| 摘要 |
<p>PURPOSE:To form an ultra-high strength cement compsn. which has high strength, has strength developability for a long period of time, is less wearable and has high bending strength by essentially consisting said compsn. of a hydraulic material, superfine powder, high-performance water reducing agent, ground powder of ferrochromium slag and water. CONSTITUTION:This ultra-high strength cement compsn. contains the hydraulic material, superfine powder, high-performance water reducing agent, ground powder of ferrochromium slag and water as the essential components. The hydraulic material is exemplified by various kinds of Portland cement, blended cement, alumina cement, etc. The superfine powder is particularly preferably the silica dust and siliceous dust byproduced in the production stage of silicon, silicon alloys, etc. The high-performance water reducing agent is exemplified by the agents essentially consisting of, for example, the salt of condensation product of naphthaline sulfonic acid and formaldehyde, the salt of the condensation product of melamine sulfonic acid and formaldehyde, high mol.wt. lignin sulfonate and polycarboxylate, etc.</p> |
