摘要
采用压汞测孔法对温度影响下水泥基材料的孔隙分形特征进行了研究。得出了温度影响下压汞测孔时水泥基材料的有效压力区间,并根据孔隙介质分形模型计算出了材料在不同温度水平下的孔隙体积分维。研究表明:水泥净浆与水泥砂浆在温度影响下的损伤过程是一个分形结构,且孔隙体积分维随着温度的升高逐渐增大,与低温相比300℃以后孔隙分形特征表现的更为显著;在相同温度下水泥砂浆比水泥净浆的孔隙分形特征更明显。
The pore fractal characteristics of cement-based materials after high temperatures were investigated with MIP （Mercury intrusion porosimetry）. Under the influence of temperatures, the effective pressure range of MIP for cement-based materials is gotten. According to the fractal models of porous materials, the pore volume dimensions at different temperatures are calculated. The research shows that the damage of high temperature to cement paste and mortar is a fractal structure, and the pore volume dimensions are increased gradually with the increase of temperatures. Compared with the low-temperature, the pore fractal characteristics are more significant after 300 ℃. And the pore fractal characteristic of mortar is clearer than cement paste at the same temperature.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第23期6-10,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50408029
50778084)
教育部新世纪优秀人才支持计划(NCET-06-201)
关键词
水泥基材料
压汞
孔隙
分形特征
孔隙体积分维
cement-based materials
MIP
pore
fractal characteristics
pore volume dimensions
