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Volume 12 (1962 - 196･･･
- Issue 2 Pages 31-
- Issue 1 Pages 1-
Volume 12, Issue 2
Displaying 1-3 of 3 articles from this issue
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Makoto MORI1963 Volume 12 Issue 2 Pages 31-35
Published: 1963
Released on J-STAGE: November 14, 2013
JOURNAL FREE ACCESSThe first test on physical properties of asbestos cement boards A. (flexible boards) showed the increase of bending strength at 300～400°C, and the decrease of its strength at 500～900°C. But asbestos cement boards B. (flat sheet) showed the decrease of its bending strength at 200～900°C. The second test of chemical properties on asbestos cement boards showed that both asbestos cement boards A and B. absorbed the minimum amount of carbon dioxide at 400°C and the amount of soluble Silica decreased at higher temperature. The free lime of both boards A and B decreased its amount at about 500～600°C.View full abstractDownload PDF (391K) -
Teruya SHIMBASHI, Tomio IZUMI1962 Volume 12 Issue 2 Pages 36-50
Published: 1962
Released on J-STAGE: November 14, 2013
JOURNAL FREE ACCESSA study on the preparation of alcohol-resistant air foam compounds was made on various systems.
Adding to the tests of the foaming capacity, the alcohol resistancy of foams, and etc., small scale fire tests were conducted some selected samples, which afford the ranking of them and other practical informations.
The results are :
(1) The alcohol-resistancy is given by means of building up a metal soap film on the surface of foams.
(2) Addition of surface active chemicals affects very much the appearances of compounds and the various abilities such as the foaming capacity and the alcohol-resistancy of foam.
(3) An adverse trend between the foaming capacity and the alcohol-resistancy was recognized.
(4) Aluminum laurate and aluminum soap of coconut fatty acid are suitable for increasing the alcohol-resistancy of foam.
(5) The alcohol-resistancy of foam is sensible to the temperature of solvents and the concentration of water in solvents.
(6) No sample sufficiently resistant to any pure solvent fire was found in this study.View full abstractDownload PDF (1254K) -
Minoru HAMADA, Shoichi HOSHINO1963 Volume 12 Issue 2 Pages 51-60
Published: 1963
Released on J-STAGE: November 14, 2013
JOURNAL FREE ACCESSThough light weight sandwich panels are often being used and are very useful materials for curtain wall and other insulating constructions, its fire protectivity is not even now fully investigated, moreover the light panels have a tendency to burn more easily.
Thereupon, we tested 23 sandwich panels (as shown in Table 1), two sizes of 90×90cm and 90×180cm, on its fire protectivity, in accordance with the procedures of JIS A-1321～1302 and JIS A-1301. (Fig. 1, 2) Test results are shown in Table 3～6. Through the results of both tests, it may be generally said that, panels consisting of PVC covered steel plate (0.3mm thick) for surface, and paper honeycomb, microwool, cemented excelsior board and asbestos felt (all more than 34mm thick) for core, have the best fire protectivity (endurable over 30 minutes’ heating), but panels using ERP plate for surface are proved to be combustible in spite of its core materials.
In Fig, 3, the fire protectivity with relation to the unit weight of panels is shown.View full abstractDownload PDF (597K)
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