巻号一覧
前身誌
1960 巻, 46 号
選択された号の論文の5件中1～5を表示しています
- |<
- <
- 1
- >
- >|
-
大坪 正典, 大野 良雄1960 年 1960 巻 46 号 p. 79-84
発行日: 1960/05/01
公開日: 2011/03/07
ジャーナル フリーIn previons report (Gypsun & Lime No. 34, 16-23 1958), we concluded that a mixture of 30 to 40% of portland cement, 50 to 60 % of fine ground limestone and about 5% of Keisan-hakudo powder gives good results in practice. We present here some test results on masonry cements prepared using materials such as “perlite” and “asbestos tailing”.
From the fundamental tests, we picked 5 kinds of cements out of 23 samples made in combination of portland cement, mixture of limestone (90 parts) and Keisan-hakudo (10 parts), serpentine, perlite, asbestos tailing, and fly ash. Then, we applied these cements to adhesion tests and practical plastering works. A mixture of portland cement, limestone, perlite and asbestos tailing (30 : 30 : 30 : 10) gave the best results in workability and tint. Admixing of fly ash shows no the properties, but it brings some darkness in the cement. So this will suite for undercoating mortar or out side final coating. The quality of this kind of cement is between gypsum plaster and dolomitic plaster, but the best in abrasion resistability, which means posibility of washing and brushing. The amount of portland cement to be mixed is thought to be enough in about 20%.抄録全体を表示PDF形式でダウンロード (928K) -
永井 彰一郎, 徳竹 久治, 山川 弘之1960 年 1960 巻 46 号 p. 85-89
発行日: 1960/05/01
公開日: 2011/03/07
ジャーナル フリーIn continuing the previous studies (Gypsum & Lime No. 35, 5-10, No. 37, 18-22 1938, No. 40, 12-16 and No. 41, 19-24 1959), the present authors reported here the results of further studies on the special lime-slag or slag-lime cement (or a kind of so-called masonry cements) prepared by mixing water granulated blast furnace slag (50-60 parts), dust from cement kiln obtained by the electric dust catcher (30-50 parts) and slaked lime from carbide acetylene generator by dry process (0-20 parts). In the present paper, the cement dust from rotary kiln collected by the electric dust catcher as the Cottrell treater, was used as the admixture containing free lime, alkali sulfates, calcium sulfate, etc., which were determined already in the previous reports to be the effective accelerator for the hardening of water a granulated slag, lime and siliceous mixture of the present masonry cement.
The amounts of alkali sulfates (Na2SO4 and K2SO4) and calcium sulfate (CaSO4) were contained in the cement dust samples were determined to be about Na2SO4 3-5%, K2SO4 2-4% and CaSO4 3-5%, and also these alkali sulfates were determined already in the previous papers (Loc. cit.) to be very useful accelerator for the latent hydraulic property of granulated slag of the main component part of the present masonry cement. Five samples cements were prepared and tested on various important properties as masonry cement for tile and wall plastering uses.抄録全体を表示PDF形式でダウンロード (649K) -
笠井 順一, 太田 秀雄, 中原 万次郎1960 年 1960 巻 46 号 p. 89-93
発行日: 1960/05/01
公開日: 2011/03/07
ジャーナル フリーBurned lime has a tendency to hydrate easily with water, if NaCl (or KCl) was added on the lime burning. On the other hand, lime products which do not contain Na2O (or K2O) or Cl-, are demanded for certain use. Present authors stutied how much Na2O (or K2O) or Cl- is contained in lime products and how much of them volatilize on burning.
The results are summarized as follows :
(1) On the burning of lime the added NaCl or KCl is almost volatilized, and KCl volatilizes more easily than NaCl.
(2) Na2O and K2O are not contained in limestone, but in shells or aragonite.
(3) And Na2 O (or K2O) is not contained in the soft burned lime, but is found in the hard burned lime, the latter case being caused by the fire bricks, which have been used in the construction of the furnaces, or coal ashes.
(4) Cl- in the hydrated lime is not caused by the lime or limestone, but by the water used for the hydration of lime.抄録全体を表示PDF形式でダウンロード (597K) -
寺岡 一郎, 伊藤 集〓1960 年 1960 巻 46 号 p. 93-98
発行日: 1960/05/01
公開日: 2011/03/07
ジャーナル フリーThe vibrating-plate viscometer enable use to measure the change in viscosity of slurris (clay slips) as it sets up in the plaster mold. The phenomenon of the dehydration of slurries by the plaster mold is similar to that is the flow of fluid through packings. We studied the relation of setting time t and x the distance from wall. It is seen that on a log-log chart the experimental points fall close to a straigt lime. We obtained an equation as follows :
log t= 2 logx-A (A= constant)
When t is the setting time of slurries and x is the distance from wall of the plaster mold抄録全体を表示PDF形式でダウンロード (583K) -
中富 慶介1960 年 1960 巻 46 号 p. 99-102
発行日: 1960/05/01
公開日: 2011/03/07
ジャーナル フリーPDF形式でダウンロード (453K)
- |<
- <
- 1
- >
- >|