| 摘要 |
<p>For use in cementitious systems, a modifier is disclosed comprising a solid polydispersed organic-mineral composition consisting essentially of a water reducing component, a mixture of water-soluble organic and inorganic salts and a mineral base. The water reducing component comprises an organic polymer with low adsorbent activity. The mineral base comprises a mixture of two or more active mineral substances with specific surface areas of no less than 1500 cm2/gm and a high adsorbent capacity with respect to water. The water reducing component preferably comprises a homopolymer obtained by a polymerization regulated by formaldehyde mixed with formalin with a mineral starting system followed by adding a regulator for the degree of polymerization. The solid polydispersed organic-mineral composition is obtained without using external heating sources.</p> |
