MEASUREMENT OF THE PORE WATER PRESSURE OF EARLY-AGE CEMENT-BASED MATERIALS: SIGNIFICANCE, TECHNIQUES AND ENGINEERING OUTLOOKS

被引：0
|
作者：
Tian, Qian [1 ]
Liu, Jiaping [1 ]
Miao, Changwen [1 ]
Sun, Wei
机构：
[1] Jiangsu Acad Bldg Sci Co Ltd, Nanjing, Peoples R China
来源：
MICROSTRUCTURE RELATED DURABILITY OF CEMENTITIOUS COMPOSITES, VOLS 1 AND 2 | 2008年 / 61卷
基金：
中国国家自然科学基金;
关键词：
cement; pore water pressure; measuring; pressure recovery;
D O I：
暂无
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Cement-based materials are essentially porous media. Their physical properties are largely influenced by the thermodynamic state of the internal pore water. Measuring pore water pressure of early-age cement-based materials helps not only to study the driven force of their early-age shrinkage behavior but also to investigate their early-age microstructure evolution. This paper gives an overview of the measuring techniques of pore water pressure in very early-age cement-based materials. In particular, the air leakage problem exists in the measurement of the previous research, which is thoroughly discussed. A modified measuring system, which adopts a special ceramic head referenced to soil research, is introduced to improve the air-tightness and prevent the pressure recovery error. The experimental results of the pore water pressure development also give promising outlooks for further engineering application in the construction site.
引用
收藏
页码：1439 / +
页数：3
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