HPC APPLICATION IN DEEP ALLURIUM FREEZING SHAFT AND MICROCOSMIC ANALYSIS

摘要：

Freezing method is often applied in the mine shaft wall construction. The paper ismainly to analyze pore micro-characteristics of high-performance concrete (HPC) at lowtemperature through scanning electron microscope (SEM). Conclusion is that the crack of lowtemperature concrete is more serious than normal temperature HPC through the SEM researchon micro-structure of pore and pore size. And the cement hydration of low temperatureconcrete is less than HPC at normal temperature. Mercury intrusion porosimetry (MIP),compared to normal temperature HPC,low temperature HPC has more complicated porestructure,larger threshold pore diameter and average pore diameter and most possible porediameter. The reason is that the volume of water which is gradually converted to ice at lowtemperatures expands and the volume of pores in HPC also expands. So the effect of lowtemperature on HPC can not be ignored in some ranges.

关键词： low temperature HPC pore characteristics micro structure

作者: Hui Cao Ren-shu Rang Wei Huang Zhao-ran Zhang Jun Zhang

作者单位: School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing 100083,PR Ch School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing 100083,PR Ch

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 430-435

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）