| 摘要 |
<p>PURPOSE:To prevent the separation of an aggregate and to obviate bleeding with this composition by incorporating a specified amt. of biological cellulose, etc., into the concrete composition contg. cement, aggregate and water. CONSTITUTION:The microorganisms such as Acetobacter pasteurianus are cultured to obtain a biological cellulose (A) contg. heteropoly-saccharides. The fungus obtained by culturing mildew, yeast, bacteria, etc., is then treated with alkali and bleached to obtain mycelia (B). The component A and/or the component B are added by 0.0001-0.05wt.% on a dry basis to a concrete composition (C) obtained by mixing cement, aggregate and water and mixed to produce a composition to be mixed in concrete.</p> |
