【摘 要】
：
In order to understand the important role of SAP entraining water in the development of properties of high performance cement-based material, the effect of SAP entraining water on its rheological prop
【机 构】
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College of Civil Engineering, Henan University of Urban Construction, Pingdingshan 467036
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
In order to understand the important role of SAP entraining water in the development of properties of high performance cement-based material, the effect of SAP entraining water on its rheological property, compressive strength, autogenous shrinkage, pore structure and hydration were studied in this paper.The results show that the water of SAP entraining evidently decreases the autogenous shrinkage and 1-hour plastic viscosity and yield stress;appropriate water-entrained amount of SAP promotes the hydration of cement clinker and the reaction between Ca(OH)2 and silica fume or fly ash, and increases the 28-day strength;SAP raises the amount of small pores but reduces the amount of large pores.In addition, the effectiveness of SAP entraining water on the strength and hydration is much greater than that of extra-water directly added in the condition of RH 75%.The effects of SAP on the rheological property, autogenous shrinkage and hydration degree are attributed to the water release of SAP, and the effect on the strength is related to the porosity of mortar and the hydration degree of cementitious materials.
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