Improved building compositions are prepared by including in CaO-containing components/SiO.sub.2 -containing components admixtures a small amount of chemically precipitates silicic acid containing flourine as an impurity. A steam-cured building material preferably prepared by first pre-grinding sand with the chemically precipitated silicic acid and water, storing the resulting slurry for at least 0.5 hour and then mixing it with the CaO-containing component. The wet grinding and storing steps have been found to have a surprisingly favorable effect on the viscosity of the pumpable sand slurry and on the behavior of the risen mixture at the cutting.
Novel 2-substituted thiazol-2-yl-oxamic acid esters, processes for their preparation, and therapeutic agents which contain these compounds and are useful in the treatment of allergic disorders.
A high porosity silicocalcareous mass is obtained by using in at least partial replacement of the usual silica, amorphous ultrafine synthetic silica particles having a specific surface between 150 and 300 m.sup.2 per gram, and a high absorption capacity, and optionally adding nonreactive synthetic fibers of either inorganic or organic origin to the mixture containing the particles. The high-porosity silicocalcareous mass can be used as a lining material for containers, which are intended for storing liquified or dissolved gases and also as an insulation material, such as sound insulation in building construction.
A high porosity silicocalcareous mass is obtained by using in at least partial replacement of the usual silica, amorphous ultrafine synthetic silica particles having a specific surface between 150 and 300 m.sup.2 per gram, and a high absorption capacity, and optionally adding nonreactive synthetic fiber of either inorganic or organic origin to the mixture containing the particles. The high-porosity silicocalcareous mass can be used as a lining material for containers, which are intended for storing liquified or dissolved gases and also as an insulation material, such as sound insulation in building construction.
A silicocalcareous mass with high porosity is obtained by using, in at least partial replacement of the usual silica, ultrafine synthetic silica with a large specific surface of 200 to 500 m.sup.2 per gram to a paste of lime and silica, and possibly adding nonreactive synthetic fibers of organic or inorganic origin. The silicocalcareous mass with high porosity can be used in the field of lining materials for containers intended to store dissolved gases and in the field of insulation materials.
