摘要
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。
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 analy- sis 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.
出处
《石家庄铁道大学学报（自然科学版）》
2013年第1期55-60,92,共7页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
关键词
水泥基材料
磨细矿渣
微结构
矿渣反应程度
非蒸发水
孔径分布
cement-based materials
blast-furnace slag
microstructure
reaction degree of slag
non-evap-orated water
pore size distribution
