セルロースエーテルを添加したコンクリートの材料分離特性に関する材料設計法

概要

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The nonionic cellulose ether, a kind of water-soluble polymer, is used for several cement matrices such as plastering mortar, ceramic tile mortar, self smoothing flooring compound, high fluidity concrete, antiwashout underwater concrete, shot concrete and cement extrusion molding e. t. c.. The purpose of this study was to clarify the influence of the moIecuIar weight and the concentration of cellulose ether on characteristic in three kind of concrete (high fluidity concrete, antiwashout underwater concrete and shot concrete) containing cellulose ether. The results obtained were as follows. 1) Characteristics of concrete (such as the resistance of segregation e. t. c.), as well as mortar and cement paste was previously reported, were affected by the molecular weight and the concentration of cellulose ether. 2) Characteristic factors were able to be expressed by the following function of the molecular weight and the oncentration on material design method. Characteristic factors ∝ M^α×C^β where M : moIecuIar weight of cellulose ether, C : concentration, α, β : (0.67, 1.0) or (-0.67, -1.0)
2000-07-30