セメント系押出成形材料の乾湿ムーブメントに及ぼす増粘剤の粘性係数の影響に関する実験的研究

概要

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Visco additives are one of the indispensable substances for performing the actual procedures of cementitious materials production by extrusion moulding in factories, which are also the most effective in determining the cost of the products. This paper deals with a series of experiments for examining the effects of viscosity of the additives. As a result, the following technological items are clarified from the viewpoints of reducing drying shrinkage strains; 1) The medium viscosity, that is four thousands MPa・s is the most appropriate in comparison with the lower and higher ones. 2) The residual strains after moisture and drying repetitions inversely appeared in case of the lower viscosity and higher one. 3) Increasing trend of drying shrinkage strain amplitude is experimentally related to that of residual strain.
2004-06-30