MEASUREMENT OF THE PORE WATER PRESSURE OF EARLY-AGE CEMENT-BASED MATERIALS: SIGNIFICANCE, TECHNIQUES AND ENGINEERING OUTLOOKS
Cement-based materials are essentially porous media. Their physical properties are largelyinfluenced by the thermodynamic state of the internal pore water. Measuring pore waterpressure of early-age cement-based materials helps not only to study the driven force of theirearly-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 veryearly-age cement-based materials. In particular, the air leakage problem exists in themeasurement of the previous research, which is thoroughly discussed. A modified measuringsystem, which adopts a special ceramic head referenced to soil research, is introduced toimprove the air-tightness and prevent the pressure recovery error. The experimental results ofthe pore water pressure development also give promising outlooks for further engineeringapplication in the construction site.
cement pore water pressure measuring pressure recovery
Qian Tian Jiaping Liu Changwen Miao Wei Sun
Jiangsu Academy of Building Science Co.,Ltd,Nanjing,China Southeast University,Nanjing,China
国际会议
南京
英文
1439-1448
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）