[in Japanese]

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A variety of studies about tile finishing on concrete have been made, on the other hand, those studies on ALC panels are little. Especially, studies about stress transfer mechanism between ALC panels and tile, deformation behavior between two materials under compression and tensile stress is not seen much. And mortar is often used for tile facing, in recent years has also increased organic adhesive used. So studies about these adhesive using for tile facing is required. Thus, this paper reports on the results of investigation into the deformation performance of tile facing on ALC panels under compression and tensile stress.

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It is expected that method of exterior wall tiling with organic adhesives can prevent delamination of tile to reduce delamination stress in the interfaces between concrete and finishing tiles. In this study, we evaluated the long-time durability of that method. We made specimens of exterior wall tiling with organic adhesives considering rough construction as underfilling of organic adhesives. And we carried out accelerrated weathering test supposed outdoor environment. Thereafter We attempted to evaluate deformation performance in tensile adhesion test and to assess by chemical analysis before and after accelerrated weathering test.

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The Evaluation of adhesive ability of tile finishing extrior wall coated with tranceparent acryl urethane water-proofing menbrane carried out by accelation test. In this method, major cause of decrease in adhesive strength turned out to be the distortion gap caused by water adsorption expantion of the concrete. Therefore, the tranceparent acrykic urethane water-proofing menbrane was effective in preventing deterioration of tile adhesive strength.

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Ohya stones are used as inner and exterior materials of a modern building.As a degradation factor of an ohya stone,change of the surface accompanying water absorption expansion,the freeze-thaw in a cold district,etc.are mentioned as a degradation factor.This reseach is done for the purpose of grasp the degadation phenomenon by frose damage of ohya stones.

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Precast concrete curtain walls tend to be a large size and light-weight, and cracks of 0.1mm width can form at the original of concrete,in spite of flat painting texture in chosen by for design. And at the light-weight precast concrete used particular aggregate, new problem has occurred that it`s percentage of water content doesn’t goes down quickly. On one hand, recently it is requested to use the water-based coating materials that exhaust non volatile organic compounds to take care of environment. Therefore, we took notice the polyethylene emulsion that are high adhesion strength to high percentage of water content concrete, and we applied that to develop the water-based undercoat. Developed water-based undercoat adhere to concrete under 11 percentage of water content and prevent the formation the blister. And it has verified that developed water-based undercoat can control to width of clack that to be prevent the formation, by to control the thickness of it’s coated film.

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In general, concrete substrate is coated with urethane waterproof material after contained water has dried enough.Because troubles of blistering and peeling of urethane waterproof membrane are found here and there after urethane waterproof material has become hardened.On the other hand,take account of quality and durability of concrete substrate, completely dry of it is not necessarily appropriate.With all these factors, we continue the investigation of relation between the amount of contained water of concrete substrate and the blistering of urethane waterproof membrane.In our previous report,we demonstrated that frequency of blistering is derived from thickness of the coating and drying time of primers.In this report, we describe the experimental result of primers to promote curing and consider the factor of reducing means of blistering of urethane waterproof membrane.

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The purpose of this paper is to clarify persistence of the surface protection effects environment in outdoor exposure and suppress degradation of the penetrant by increasing the reactivity of the Alkoxy group in the pores of the concrete. Here, we report the results of evaluation based on the JSCE-K571-2004 by using the two different types of Silane. It was found that: 1) Performance of Silane has been improved surface protection effects by increasing the reactivity than the depth of penetration. 2) Surface protection effects of concrete were significantly improved by combining the Silane and Silane-Siloxane. 3) The effectiveness of reforming the surface properties of concrete was confirmed that surface protection effects has been maintained Even after 48 weeks of outdoor exposure.

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It publishes the results of research work that studied to prevent the deterioration and conserve the building of architectural concrete. We accepted and compare the two coverings of concrete which were surface impregnation materials and coating agent, and verify the effect of moisture, gas permeability and neutralization control. As a result, it was clarified as follows. (1)The surface impregnation materials don’t change appearance compared with plane concrete, but it have not neutralization control. (2)The surface coating agents have visual change, but it have high effect on neutralization control. (3)It anticipates the correlation between gas permeability and neutralization control, but not between moisture concrete and neutralization control. It is necessary to apply the other methods of inspection.

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Finishing materials applied to reinforced concrete buildings are known for the improvement effects of durability of reinforced concrete, however, it is not clarified the chloride resistance effect. Chloride resistance of finishing materials is evaluated by apparent chloride diffusion coefficient generally, however, the evaluation methods have not been established. This study deals with the evaluation methods for apparent chloride diffusion coefficient of coating materials for textured finishes. We tried to evaluate by three methods which were literature survey, outdoor exposure test and salt water absorption test. As a result, we showed the extent of apparent chloride diffusion coefficient each type of coating materials for textured finishes. We also showed possibility to estimate the apparent chloride diffusion coefficient based on initial absorption rate of salt water absorption test and moisture permeability of the coating materials for textured finishes.

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In order to develop the tool which contributes to decision of future maintenance and management, the technique of predicting the life of external finishing is built. However, it is not easy for construction, environment, material characteristics, an operating condition, and other complex factors to be contained in degradation of external finishing, to accumulate the degradation mechanism for every factor, and to predict the whole. So, in this research, the degradation situation of external finishing is grasped through real structure investigation, a degradation factor is quantified, and establishment of the life prediction technique of the building materials by the degradation simulation using a probability theory model is tried.

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Gloss retention is known as indicator on durability of coating materials. It seems important to estimate the gloss retention in order to estimate the service life of coating materials for maintenance of buildings. Previous study proposed some methods on the gloss retention estimation, however, it was not established. In this paper, we dealt with the estimation methods on gloss retention decrease of coating materials exposed to outdoor based on literature survey. From the results, we proposed estimation equation on the gloss retention, and clarified correlation between outdoor exposure test results and the estimation results. We also calculated the service life of coating materials from the view point of beauty.

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Almost all of natural materials have preserved a strengthening and durable properities in itself and have composed a physical body in a reasonable system such as a wood so on. The objectives of this research is to make clear the fundamental properties of inorganic-organic composite material preserving organic material character using loofah for the structure frame. With the result, the organic frame of loofah make an effectiveness to develop the machanical properties of inorganic-organic composite material as building finishing materials.

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It painted, the interior of a room became bright, and it examined illumination measurement paying attention to the high diffuse reflective interior paint with which the energy-saving / power-saving effect is acquired.　And　the examination object which painted the lusterless paint for interiors, a mortar paint, and a total of three sorts of products was prepared for comparison, illumination measurement was performed, and comparison verification of energy saving of the high diffuse reflective interior paint and the power-saving effect was carried out.

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It was examined whether the low stain technology by the hydrophilic paint surface that was mainly used for the purpose of lowering striped soiling due to rainfall on outer wall is applicable to prevention of solar reflectance degradation of high solar reflectance paint.　As a result, the hydrophilic treatment of paint surface was effective to a certain degree for prevention of solar reflectance degradation. Moreover, the effect was not based on exposure angle, the brightness of paint, thermal barrier pigment.

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In late years the use of high reflectance paint is promoted, and markets are increasing year by year.We carried out various experiments about the effect of high reflectance paint.It is often that the high reflectance paint is painted as a main use on a roof part, which deterioration generally accelerates on most rapidly among the parts of buildings and it is thought that the durability of the paint is related to the durability of the performance to block the heat.In this report,it followed a previous report(part5), we conducted an investigation of the durability of the performance to block the heat with the high reflectance paint by a test of natural wethering test for four years and accelerated weathering test for 5000 hours.

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We reported outdoor revelation four years later and a result 5,000 hours after the promotion weatherability about the weatherproof examination that continued by a previous report(part5）.By these weatherproof examinations, I went mainly on a gray color.　It is often that the high reflectance paint is painted as a main use on a roof part, which deterioration generally accelerates on most rapidly among the parts of buildings and it is thought that the durability of the paint is related to the durability of the performance to block the heat.In this report,it followed a previous report(part3), we conducted an investigation of the durability of the performance to block the heat with the high reflectance paint by a test of natural wethering test for two years and accelerated weathering test for 3000 hours.

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In recent years, energy saving have become an important subject. This is resulting from issuessuch as exhaustion of resources, environmental issues such as global warming and atmosphericpollution. Under these circumstances, cooling load has become an important issue concerningwindow panes used in buildings. IR reflecting window panes/heat absorbing window panes are usedto shield sunshine as one solution for saving energy. However use of such window panes hasseveral issues, one of which is the window panes having to be colored. Use of heat absorbingwindow panes has a large effect on shielding sunshine. However, when the sun is shining,elevation of room temperature tends to be greater compared to transparent window panes. Webelieve that the room temperature rise is caused by the fact that the temperature of heatabsorbing window panes themselves elevates by absorbing sunshine. This report details ourproduct that we have developed which is a transparent insulation coating. This product wasdeveloped byreviewing the relevancy of surface temperature and internal temperature of variousglasses with different solar absorptivities and also by reviewing room temperature change andcondition of dew condensation when difference of outside temperature and room temperatureexists

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The purpose of this study is to evaluate anti-algae and anti-mold performance of photocatalytic coating, and to compare such performance with coating materials including anti-algae and anti-mold chemicals. Laboratory tests for evaluation of anti-algae and ant-mold performance under rather low level of UVlight irradiation were carried out by consulting with JIS Z 2911 (Methoods of test for fungus resistance) and JIS R 1705 (Fine ceramics (advanced ceramics,advanced technical ceramics)- Test method for antifungal activity of photocatalytic under photoirradiation). As a result, it was found that photocatalytic activity was confirmed in the early stage of algae and mold development even in the low level of UV irradiation. However, the ordinal coating materials including ant-algae and anti-mold chemincals showed higher performance than the photocatalytic coating materials

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The authors are studying on the construction of infection controlled toilet system as a tool of controling infection at hospitals. In order to prevent contact infection, the authors have improved on antibacterial performance of finishing materials by applying photocatalyst coating material. This paper describes the development of photocatalyst coating material, the evaluation of antibacterial performance and the testing method of antibacterial performance outside of laboratory. As a result, it was clarified as follows. (1)This photocatalyst coating material shows superior antibacterial performance. (2)It might be possible to evaluate antibacterial performance of materials which is applied to the buildings by using bouillon.

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Oiented Structural Straw Board and is a molded plywood pressurized MDI is heated by the fiber of wheat. This study, as a factor changing the thickness of the Oiented Structural Straw Board, in addition to its properties and durability, we make a study of its applicability to woodenwalls. As a result, Young's modulus is in comparison with the reference value of the structural panel JAS-, in the axial direction and the bending strength was lower than the flexural strength, the strength of anisotropy were very few. In addition, the in-plane shear test was performed using the Oiented Structural Straw Board of 12mm thickness, it has the strength magnification wall becomes about 2.9 times to 3.3 corresponding to the pair axis put the braces of wood over angle 90mm is clear

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Long-term durability is an important factor from the trail tarp which is one of the target uses having a use life for about 10~20 years in utilization of a reproduction resin sheet.However, although the fundamental durability experiment is conducted in past research, the examination about long-term durability has not been started. Moreover, with the increase in a scrap wood mixing rate, quality and durability fall and have been a subject of efficient material recycle. So, in this research, while examining long-term durability, when quality double-stratifies a low reproduction resin sheet, improvement in quality and improvement in durability are aimed at at a monolayer.

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Discoloration of vinyl floor coverings is caused by a number of possibilities, thus it is difficult to determine the various causes. In order to study on discoloration of vinyl floor coverings, vis-UV spectroscopy and infrared spectroscopy were carried out. The spectroscopic studies showed possibility of degradation of vinyl resin and colorants.

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At a food-processing plant or a factory, chemical coating is used as a flooring material in many cases. The bad smell at the time of construction of a coating floor is high, and organic solvents, such as toluene and xylene, are contained as an ingredient. The main ingredients of these bad smells may remain as a bad smell ingredient, even after the hardening reaction of resin which is TVOC (the total volatile organic compound) and is the main ingredients of a coating floor is completed, and they may bring a bad influence to a product and work. Moreover, the primer used for ground processing work also caused a bad smell in many cases, and the bad smell has generated it over a long period of time in this case. Although "low bad smell type" chemical coating is put on the market on the other hand, what is conventionally compared with elegance and is shown about reduction transition of TVOC is little. This time about epoxy resin system chemical coating and MMA resin system chemical coating which are used in many cases, Since the simple examination which is possible in a testing laboratory was devised and each chemical coating was actually measured in order to predict change of the TVOC amount of emergence by about 8 hours which care-of-health time completes from immediately after construction, the result is reported.

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The deck materials using the WPRC receive quite a few worn in outdoor walk environment, and it is thought that it becomes easy to be slippery. We changed a surface state and examined it to grasp that how performance decreased when deck materials were remarkable worn．The examination have done both with a method by JIS and the method by ASTM. As a result that　when the surface became smooth, there was no difference in big sliding characteristics if the surface was in a dry state, and the surface became hard to be slippery when it was the water wet. In addition, it became easy to glide slightly when mud attached to the surface. But, in the case of the water wet, the tendency that was reverse to test method by JIS appeared by ASTM. We are going to continue to examine it in order to suggest the test method that is a real walk sense.

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The purpose of this study is to grasp the climatic loads to estimate the durability of ceramic sidings in different part, region or direction. In this research, a simultaneous heat and moisture transfer analysis was conducted, focusing on the vent layer which has a large influence on durability of exterior materials. From the results of full scale exposure test, it is observed that the temperature in vent layer near the surface of the ground was lower than the other parts, the temperature below the window was observed to be higher due to the air strage. The temperature below the breather was not affected by the ambient temperature but by the indoor temperature. Also the results were examined by the simultaneous heat and moisture transport analysis in unsteady state which showed a smaller temperature than the measured temperature. In addition, by using the local durability factor obtained by the exposure test , the climatic degradation loads are examined by the analysis.

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This study is intended to establish maintenance technique of the cementious siding. The outer wall receives directly detarioration factors including a temperature change, wind, rain and ultraviolet rays. However maintenance technique of cementious siding has not been established yet. This study particularly focused on the behavior of the joint that is the weak point of the outer wall. Numerous data has been collected in order to grasp the behavior under the real environmental conditions, and to establish maintenance technique consisting of a deterioration prediction.

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In this research, the outdoor exposure test was conducted to examine the climatic loads depending on the directions and the areas of materials. Two different specimens for the exposure test were built in Asahikawa and Tsukuba. In this paper, the degradations of 2 years exposure test were discussed, focusing on the effect of moisture behavior and the wet condition of the walls. From the results, it is confirmed that the moisture content at the surface of the wall was brought by rain. Furthermore, the moisture at the surface was calculated by the method of Dr. Ishikawa with standard meteorological data in each region.

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We have developed aqueous graffiti removal agent. In this report, we describe the development summary and result of graffiti removal and spray workability evaluation. As a result, it was clarified as follows. (1)It can remove graffiti without dissolving under-coating. It can remove graffiti on concrete block walls that can’t be removed by solvent mixture very well. (2)It has spray suitability without sagging by viscosity control. (3) It is a non-hazardous material in the Fire and Disaster Management Act, does not fall under the Industrial Safety and Health Act.(4)Its suitability was verified under actual use by volunteer group.

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This paper deals with optimum lighting conditions for good appearance of rough surface illuminated a spotlight for building finishing surface.Flexible boards(900mm×1800mm)finished with 8kinds of rough surface pattern were used for the test wall.A halogen lamp was fixed to the top of test wall,and the wall was illminated by the lamp with 11 kinds of brightness at the center of wall.The luminance was measured at 12 points par a unit (300mm×450mm).The wall was divided in 12 small unites.Relationship between the luminance distribution of test wall and the appearance of rough surface was analyzed.The test results are as follows.It can seen very well when luminance is 500 to 1000cd/㎡,however it cannot seen very well when luminance is 500cd/㎡　or less and more than 2000cd/㎡

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Various wallpapers have been producing in Japan recently. Although the selection method of these wallpaper tends to be dependent on the judgement of designers and special construction vendors, it comes to be an aging society and people's activity for creating the interior of a room for pursuiting beauty or comfort would be important. For the reason, the visible change of the design of wallpaper depending on the interior space is useful technology toward the near future. This research uses the wallpaper which making differences an image and an encaustic pattern by moving amang observation distance, the sensory test were conducted and the tendency of impressive were evaluated.

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In Japan, toward the aging society, the oppotunity and the activity for lots of people in the interior have been increasing, and it becomes a new situation such the changes of the design of wallpaper as the typical interior space are required a high-level demand conditions so as to pull up the comfort and beauty in the space. So, the first study of part.1 is evaluated the impression of the texture of new-materials wallpaper including some kinds of texture patterns by the sensory test in the darkroom.In this pepar, the cerebral-blood-flow of the test parson using a near-infrared part cerebral function imaging instrument is measured, and the influence which the pattern changes of a texture for brain activity is evaluated by the sonsory test uding a digital image.

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The rain dropped on draining board flows down on the building external wall during raining. And then the flowed rain marks remain on the wall as dirt after raining. The dirt mark is called “rain streak dirt” in this paper. The rain streak dirt often can be seen where under of window, top of parapet, and etc.. The rain streak dirt is caused by the flowing water with dust accumulated on the draining board. The acceleration test method was developed to evaluate the dirt-resisting building external materials. This paper describes the comparison between the outdoor exposure test results and the acceleration test results for building paints. The steel sheets coated with 13 kinds of paint were used as test specimens. As a results, the higher water contact angle of specimen, the grater the color difference. In addition, the color differences of acceleration test results are larger than that of outdoor exposure test at six months.

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In this study, including high-quality amenities and produced in Tokyo Disney Resort complex, hospitality, experience (acoustics, lighting, beautification of the environment, aging), and the fake service architecture, filled with entertainment in Las Vegas about the appeal beyond the experience worked here for two years, from the awareness that occur when the earthquake, and the splendor of Disney, who diction of the light ofchange of impression by the sound effect, extend the life of finishing materials. report that was obtained.

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A new quality and performance standard for anchor pins with inlet for epoxy injection was proposed based on a series of experiment. Shear strength of anchor pins, pull out strength for cement mortar layers, pull out strength for concrete, resin leakage protection performance were evaluated in the study. As a result, the anchor pins whose diameter is more than 4.5 mm could meet the current standards for the anchor pins whose diameter is more than 6.0 mm.

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For long-term and effective use of the building stock, external wall repairing is getting more important. Pin-Net external wall repairing is one of the external wall repairing. Now, there are some studies for evaluation of each Pin-net external wall repairings, but there are only a few studies to compare the characteristic of them in term of the same viewpoint. In addition, it is necessary to compare the repairings from the viewpoint of resistance of concrete crack opening. In this study, using 6 types of the multi-axis fiber net, we did a tensile test for bond strength of the nets and 3-point bending test, to compare the characteristic of the nets in Pin-Net external wall repairing.

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Some kinds of renewal method for existing external walls by application of net overlaying and anchoring have been developed. Characteristics, progress and durability of a method from them are reported in this paper. The method has been confirmed standard specifications based on many experimental evaluations in the biginnings of the devopment and investigation into the actual conditions have been continued for 20 years to evaluate the durability of the method. It is judged that physical properties change of applied materials has not been recognized in the present states.

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People put an emphasis on regeneration of apartment building .Now, the Urban Renaissance Agency made and carried out the plan about the renovation of the apartment building that is based on “repair Up-grading”.We make a report of the renovative design of outer wall coating which carried out in the “repair Up-grading”.First, we consider the future of the community, and determined “concept by total coordination” as all renovation concept. Next, we made the coating design by “outer wall coating idea” based on “concept by total coordination”.In order to improve weather resistance and contamination resistance, this design adopted the hybrid inorganic-organic paint (polysiloxane) which isn’t standard specification of the Urban Renaissance Agency.

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Recent years, thermal insulation of remodeling of a complex housing has been reviewed accroding to social demand of energy and resource saving. Therefore,number of pair glass windows are increased instead of conventional single glass windows in remodeling of window. On the other hand,result of an improvement of an air tight and a thermal insulation performance on the surface of pair glass are often caused problem that is dew condensation occcring on the case and architrave. This paper addresses that the dew condensation prevention method using plastic architrave. Two cases are studied to compare the performance of the proposed method and another method which is used aluminum architrave. The effectiveness of proposed method was verified throgh experiments.

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Recently, water leak issues have been caused by breaking, peeling and deformation of sealants or FRP membrane by degradation over time and contact of marine lives in aquariums. Repair materials that can be used in water are needed to repair the water leak without any concern for the marine lives. However it is known that peeling issues would be seen if an epoxy putty is used as a repair material. Because the epoxy putty shows poor followability to existing sealants. In this report, test results of lab and field evaluations on adhesion properties, curing properties, workability and establishing quantitative assessment with one component “silyl terminated polyether” based sealant are repoeted as a repair material for aquarium maintenance.

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It is known that pollution, cracks, sticky surface, bubbles and peeling of finishing materials may be occurred if a finishing material is painted on a construction sealant.It is also reported that using a non-bleed type sealant is effective to reduce risk of pollution of finishing material.This report is evaluation results of adaptability to finishing materials with a newly developed silyl terminated polyether based non-bleed type sealant.The evaluation on adhesion and pollution have been done with combinations of nine(9) sealants, six(6) finishing materials and w/wo barrier-primer.

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Tokyo tower, which is the one of famous tower in japan, was constructed in 1958 and has kept good condition as a radio tower. Body of Tokyo tower consists of steel and zinc plating and it was painted 9 times with phthalic resin coating every five years from it's completion in order to maintain it's beautiful appearnace and prevent from corrosion. It will be the most important concering to matintain it's beauty in future. As accounting to hold beauty of Tokyo tower, it has been necessary to study and apply eco-friendly coating because of recent concering for enviroment. Therefore we did test for water paints which is a major method in order to reduce more VOC than conventional coating. And durability had been evaluated for 5 yeaes from 2006. According to a result of evaluation of durability, we proposed possible coating.

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Previous studies reported that finishing materials improve durability of concrete, however the mechanism was not clarified. There is a correlation between the water properties of concrete and the durability. So, in former report, the author investigated the moisture contents in concrete by using electrode method and reported the effect of finishing materials on the water transfer properties of concrete in drying and wetting process. In this report, we investigated the water properties of concrete with finishing materials exposed to drying in long period, seventeen month. In addition, the author investigated seventeen month drying shrinkage strain of concrete with finishing materials which would be correlated with water properties.

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This paper is testing to nondestuctively estimate of compressive concrete by changing lightness of concrete surface by moisture movement on concrete surface part by using image processing. In this report, as a fundamental study, concrete specimen. As a result, the higher water to cement ratio, the time for moisture movement is shorter, so that, we forecast we are able to estimate of compressive strength of concrete by changing lightness of concrete surface by moisture movement.

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The objectives of this research are to make clear the properties of concrete using scallop shells for fine aggregate. The author made specimens which are let crack at finishing part of reinforced concrete and measured time of reaching permitted crack mouth .As the results of this study, scallop shells are superior to resist aging deterioration

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In recent years, masonry joint construction methods are diversified. However, it is not clear mechanical characteristics of masonry system with the various joint form, especially, joint mortar strength. It is not established investigation methods of the joint mortar strength. So, by this research, as a joint strength investigation method in a concrete block construction system, scratch test is considered.We scratched specimens which consists of masonry unit and joint mortar, and measured wide of cracks. We inquire influences by masonry unit, joint mortar, joint width, grade of dryness at the time of construction, and measurement position.

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In residential concrete foundations constructed on sulfate-bearing ground, sodium sulfate contained in the soil attacks concrete, and the scaling of the concrete foundation above the ground level often arises from the crystallization pressure of the sodium sulfate. In this study, we tried to establish a repair method using a coating material. As a result of laboratory experiment, following conclusions were obtained. Before applying a coating, it is necessary to chip the deteriorated part carefully. Coating has to be applied from underground part of the concrete foundation. Polyurethane resin coating, which has high strength, high adhesiveness, and low water permeability, is useful to protect the concrete from the deterioration.

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Organic and inorganic hybrid type paint, the final coating that undercoating combined stratified formation clay minerals with the coating in adhesion with the groundwork as for the neutralization restraint painting system with the organic no machine hybrid paint are three levels of constitution to give fine dressing-related weatherability. With (Part 1), I reported the validity on the basis of the evaluation results such as interception-related flattery characteristics of this system. With (Part 2), I reported performance for the long terms such as durability, fatigue characteristics of an evaluation of the hybrid paint which was middle coating and this system. Because I develop an expensive clear painting system of the needs of neutralization restraint characteristics from a customer and a designer for makeup strong beat concrete in this report and was of practical use, I report various performance evaluation results or construction examples such as interception-related pollution-related crazing flattery characteristics of the development process of the hybrid paint which is the middle coating and neutralization restraint-related carbon dioxide and steam as the system-resistant.

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Various studies has been examined the effect of carbonation suppressive for concrete by coating materials. In order to evaluate the effect of carbonation suppressive for concrete of a large number of coating materials rapidly, it is desirable to develop a more simple and rapid method. In this paper was studied to evaluate the carbon dioxide Permeability of coating materials with a method of permeability box. In addition, we confirm the amount of reagent effects and humidity conditions to give carbon dioxide permeability. As a result, it was found that the permeability of carbon dioxide can be evaluated quantitatively by the box method.

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The Plaster can expect the sterilization because slaked lime which is the main ingredients is tinged with alkalinity. However, slaked lime(calcium hydroxide) reacts with the carbon dioxide in the air, with progress of time, it will change to calcium carbonate (neutralization) and the effect will fade.It is expected that neutralization has a relation to the carbon dioxide levels and humidity in the air since calcium hydroxide reacts with the carbon dioxide in the air, turns into calcium carbonate and generates water. In this research, the action of neutralization was pursued in the long run, and it has grasped what kind of action is shown.And, change was given to humidity and the carbon dioxide levels in the air, the conditions of dryness were set as them, and it was verified what kind of influence humidity and carbon dioxide levels would bring the action of neutralization.

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