磨细矿渣掺量对水泥基复合材料微结构的影响

利用压汞、背散射电镜、X射线衍射(XRD)和综合热分析以及化学测试手段系统研究了水胶比为0.48、矿渣掺量为10%~70%的硬化浆体中孔隙率、孔径分布、CH(OH)2(称简CH)含量、非蒸发水量和矿渣反应程度,以确定矿渣掺量对水泥基材料微结构的影响以及最佳掺量。结果表明：矿渣在大掺量情况下也能够改善浆体孔结构分布,相比较而言,矿渣掺量在30%～50%之间时浆体的孔隙率最小;非蒸发水曲线的变化趋势以及矿渣自身反应程度说明,在其掺量30%左右时,存在一个最佳掺量使非蒸发水含量和反应程度最高。

Influence of Dosage of Blast furnace Slag on Microstructure of Cement based Materials

To determine the influence of blast furnace slag on microstructure of cement based materials and its the reasonable dosage, the harden hydrated cement with 10%~70% slag replacement at a fixed water to binder ratio of 0.48 was measured its porosity, pore size distribution, content of calcium hydroxide and non evaporable water and the reaction degree of slag by using mercury intrusion porosimetry, backscattered electron microscopy, X ray diffraction, thermogravimetry analysis Differential Scanning Calorimetry and Chemical analysis methods. The results show that pore structure can be improved by adding slag even at high incorporating proportion. Comparatively speaking, the porosity of harden slag cement paste is smallest under the conditions of the slag content in the range of 30% to 50 %. In addition, according to the non evaporated water curve trend and the reaction degree of the slag, an optimum content can be obtained, that is the non evaporated water content and the highest reaction degree of slag, when the slag is replaced with 30 per cement content.