Measurement of the pore water pressure of early-age cement-based materials: significance, techniques and engineering outlooks
Title: Measurement of the pore water pressure of early-age cement-based materials: significance, techniques and engineering outlooks
Author(s): Q. Tian, J. Liu, C. Miao, W. Sun
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Publisher: RILEM Publications
Publication year: 2008
Pages: 1439 - 1448
Total Pages: 10
Nb references: 18
Abstract: 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.
Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00