基于不同粒径分布的低熟料矿渣水泥水化特征和孔结构特性

发布时间：2018-06-21 10:00

本文选题：低熟料矿渣水泥 + 粒径　；参考：《硅酸盐通报》2017年05期

【摘要】：低熟料矿渣水泥(LSC)是一种水泥熟料用量低,主要由粒化高炉矿渣和石膏组成的水硬性胶凝材料。本文研究水泥不同粒径分布(对应比表面积分别为358 m~2/kg、450 m~2/kg和516 m~2/kg)对低熟料矿渣水泥的抗压强度、电阻率和水化热、水化产物、孔结构的影响。结果表明,当比表面积从358 m~2/kg增加到450 m~2/kg可以提高低熟料矿渣水泥浆体的抗压强度,当从450 m~2/kg增加至516 m~2/kg时,强度提高甚微。低熟料矿渣水泥主要的水化产物是钙矾石和水化硅酸钙,增加水泥细度导致放热速率明显加快,电阻率变化曲线的下降段持续时间明显缩短,因而会产生更多的钙矾石。水泥细度增加,浆体的凝胶孔的体积分数增大,大孔减少,进一步提高浆体的密实度。
[Abstract]:Low clinker slag cement (LSCC) is a kind of hydraulic cementitious material which is composed of granulated blast furnace slag and gypsum. In this paper, the effects of different particle size distribution of cement (corresponding specific surface area of 358mg / kg, 450 m~2/kg and 516mg / kg) on the compressive strength, resistivity, hydration heat, hydration product and pore structure of low clinker slag cement are studied. The results show that when the specific surface area is increased from 358 m~2/kg to 450 m~2/kg, the compressive strength of low clinker slag cement paste can be improved, and the strength of low clinker slag cement paste can be increased slightly when the specific surface area is increased from 450 m~2/kg to 516 m~2/kg. The main hydration products of low clinker slag cement are ettringite and calcium silicate hydrate. Increasing the fineness of cement leads to an obvious acceleration of heat release rate, and the duration of the falling section of resistivity change curve is shortened obviously, so more ettringite will be produced. With the increase of cement fineness, the volume fraction of gel pore increases and the macropore decreases, which further improves the compactness of slurry.
【作者单位】：甘肃环通工程试验检测有限公司;
【分类号】：TQ172.1

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