PURPOSE:To obtain the cured body excellent in forming efficiency by mixing calcium aluminate powder, gluconic acid, etc., a specified inorg. compd. and water, kneading the mixture, forming the kneaded product and endothermically curing the formed product. CONSTITUTION:A composition consisting essetnailly of calcium aluminate powder, gluconic acid, etc., an inorg. compd. selected from inorg. salts, calcium oxide and calcium hydroxide is kneaded and then formed, and the formed product is cured to obtain the desired cured body. The calcium aluminate powder is the compd. of CaO, Al2O3 and other halogen compds. and expressed by C3A, C12A7, CA, CA2, C11A7CaF2, C3A3CaF2, etc., where C is CaO and A is Al2O3. The gluconic acid, etc., are gluconic acid or its salt, and the K and Na salts, etc., are preferably used. The strength developing property of the cured body is improved especially by using >=2 kinds of inorg. compds., and the setting time at the ordinary temp. of 15 to 30 deg.C can be prolonged.

Control for setting hydraulic calcium aluminates

Production of cured body

PURPOSE:To obtain the title composition that can develop high strength even at extremely low temperature without special curing, by comprising a calcium aluminate powder, a gypsum powder and a lime powder in a specific proportion. CONSTITUTION:The subject composition is composed of (A) 70-25pts.wt. of a calcium aluminate powder which is obtained by calcining or fusing alumina and lime and selected from (CaO)3.Al2O3, (CaO)12.(Al2O3)7, CaO.Al2O3, CaO.(Al2O3)2 and (CaO)11.(Al2O3)7.CaF2, which has a Blain value over 3,000cm /g, (B) 30-75pts.wt. of a gypsum powder which has a Blain value over 3,000cm /g, and is selected from anhydrous gypsum II showing no hydraulic property by itself such as commercially available gypsum or desulfurization gypsum, gypsum dihydrate, semicurable gypsum hemihydrate, and anhydrous gypsum II and 0.5-10pts.wt. of a lime powder which has a Blain value over 3,000cm /g and selected from slaked lime and quicklime, and, when needed, blended with a hydration retarder, a hydration accelerator and a dispersant.

Low-temperature hydraulic composition

PURPOSE:The selective penetrating reflection film, which is formed to have the optional film thickness containing sufficient indium oxide enough to show the infrared reflecting strength and the superior reflection inhibiting effect in the sun energy area

Control for setting hydraulic calcium aluminates

Citations

Production of cured body

Low-temperature hydraulic composition

References

Selective penetrating reflection film

Related Papers (3)

High Temperature Heat Contents of Aluminates of Calcium and Magnesium

Properties of the calcium silicates and calcium aluminates occurring in Portland cement

Method for preventing weathering of hydraulic calcium aluminate