process for the manufacture of vormlingen from calciumsulfaatdihydraat.

摘要

An improved procedure for manufacturing shaped products from dihydrated calcium sulfate, cement and sand, in which CaSO4.2H2O is compressed in the presence of cement, sand and water, characterized in that a. sand content is selected to be up to 40% by weight based on dry CaSO4.2H2O; b. the cement content is selected to be 8 to 15% by weight based on the combined weight of said CaSO4.2H2O and said sand and c. the water content is selected so as to be between 5 and 25% by weight based on the total components, the said composition of CaSO4.2H2O, sand, cement and water being compressed, after homogenization at a pressure of 5 to 40 Mpa, after which the compressed composition is left to condition for at least one day at a relative humidity of 80 to 100% (Machine-translation by Google Translate, not legally binding)