摘要:
To provide a method for producing granules as glass raw material without using a binder that contains an alkali metal or boron. In the method, granules are produced by mixing a glass raw material composition and water. A method for producing granules to be used for the production of alkali-free glass, which comprises mixing a glass raw material composition and water, wherein the glass raw material composition essentially comprises an aluminum source containing calcium aluminate represented by CaO·2Al 2 O 3 , a calcium source containing one or both of calcium oxide and calcium hydroxide, and a silicon source.
摘要:
Provided is a practically valuable and economically excellent insolubilizing material for a specific toxic substance: that is useful for insolubilizing treatment for a heavy metal or the like conducted by applying the insolubilizing material for a specific toxic substance to soil or on the surface of the soil; that is capable of effectively insolubilizing and immobilizing the heavy metal or the like; that is capable of making treated matter neutral so as to be reusable and environment-friendly; and moreover that is capable of imparting strength to the treated matter as necessary; and with which the heavy metal or the like is not re-eluted even when the treated matter is exposed to an environment under a neutral condition or an acidic condition. An insolubilizing material for a specific toxic substance to be used so that soil does not reach a strongly alkaline region of a pH of 11 or more, wherein the insolubilizing material for a specific toxic substance comprises an amorphous aluminum compound or a derivative thereof as a main component, or an insolubilizing material for a specific toxic substance to be used so that soil containing a heavy metal or the like does not reach a strongly alkaline region of a pH of 11 or more, the insolubilizing material for a specific toxic substance functioning also as a solidifying material, wherein the insolubilizing material for a specific toxic substance comprises gypsum obtained by adding and mixing, to the gypsum, the amorphous aluminum compound and the derivative thereof in a range of 0.5 to 60 mass parts relative to 100 mass parts of the gypsum, and a method for improving soil using the insolubilizing material for a specific toxic substance.
摘要:
Hydrophobic aggregates for use in refractory castables and gunning mixtures and methods of their preparation. The aggregates here are formed by crushing insulating fire brick and coating the resulting particles with a hydrophobic component. The hydrophobic component may be a polydimethylsiloxane having a terminal silanol group. As a result of the coating process, the coated aggregate has very low levels of alkalis. The aggregates may be used to form refractory castables that do not undergo substantial alkaline hydrolysis due to the reduced levels of alkalis. The castables made from these aggregates display superior physical properties, including lower water content, lower permanent linear change, high strength, and superior thermal conductivity/insulation properties, while at the same time possessing lower density and requiring less water to be used during castable formation. These improved properties also are observed in gunning mixtures formed from these aggregates.
摘要:
The present invention relates to a pulverulent binder-based composition comprising at least one mineral binder, an anti-dust additive which is a nitrogen-containing, phosphorus-containing or sulphur-containing organic compound comprising at least 8 carbon atoms, and aggregates and/or sand, or other inert fillers, to the process for preparing such a composition and to construction materials obtained after mixing said composition.
摘要:
The invention relates to a process for the preparation of a hardening accelerator composition by reacting a calcium source selected from calcium hydroxide, calcium oxide with a water-soluble silicate compound in the presence of at least one water-soluble polymeric dispersing agent and the hardening accelerator composition obtainable by said process. The composition has a low content of anions and of alkali cations and is therefore broadly applicable in building material mixtures.
摘要:
Disclosed are an exterior insulation mortar for cold weather which may prevent freezing and improve strength at temperatures below 0°C, and an exterior insulation system using the same.
摘要:
The invention relates to a composition comprising, based on the dry weight of said composition,(A) 10 to 70 % by weight of one or more hydraulic binder and (B) 20 to 85% by weight of one or more filler, wherein the composition contains 0,05 to5 % by weight, based on the amount of the hydraulic binder, of at least one terpenoid alcohol, wherein the terpenoid alcohol is not terpineol or borneol. Additionally disclosed is a hardened product made by the composition and the use of at least one terpenoid alcoholin a composition, comprising hydraulic binder and filler, to reduce the shrinkage of the wet composition during curing.