掺矿渣粉和减水剂的HEMC水泥砂浆物理性能

Study on Physical Properties of HEMC Cement Mortar with Ground Granulated Blast Furnace Slag and Superplasticizer

研究了掺矿渣粉和高效减水剂的羟乙基甲基纤维素 (HEMC)改性水泥砂浆的物理性能 ,其中包括新拌砂浆含气率、保水率、体积密度 ,硬化砂浆体积密度、孔隙率、毛细孔吸水率等 .结果表明 :矿渣粉和减水剂这两者对砂浆保水性和毛细孔吸水率的作用与羟乙基甲基纤维素的相同 ,而对含气率、体积密度和孔隙率的作用则与之相反 .矿渣粉、减水剂和羟乙基甲基纤维素共同掺加时 。

Physical properties of cement mortars modified by hydroxyethyl methyl cellulose (HEMC), ground granulated blast furnace slag and superplasticizer, such as air void content, water retention and bulk density of fresh mortars, as well as bulk density, porosity and capillary water adsorption of hardened mortars, were studied. The results show that effects of superplasticizer and ground granulated blast furnace slag on water retention and capillary water adsorption of mortar are similar to those of hydroxyethyl methyl cellulose. However, effects of the former on air void content, bulk density and porosity are opposite from those of the later. And hydroxyethyl methyl cellulose counteracts part effects of superplasticizer and ground granulated blast furnace slag, which results in bulk density and porosity of mortar maintaining in certain value.