Investigation of the Interstitial Pore Pressure of Saturated Concrete under High Confinement

Proceedings

Daudeville, Laurent¹  Malecot, Yann²  Accary, Abdallah³ 

[1] Author to whom correspondence should be addressed.;Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018.;Univ. Grenoble Alpes, CNRS, Grenoble INP, 3SR, 38000 Grenoble, France

关键词: wet concrete;    high confinement;    pore pressure;    hydrostatic pressure sensor;   

DOI  :  10.3390/ICEM18-05397

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The objective of this study is to measure the interstitial pore pressure into saturated concrete under hundreds of megapascals of confinement. This study is carried out within a more general context aiming to understand the behavior of concrete structures under impact. It is well known that the water saturation in massive concrete structures evolves from quasi-dry state at the surface to reach a quasi-saturated state at the core. Since the response of these structures under impact is highly linked to the state of saturation into the material, it is suspected that the pore pressure plays a major effect. This paper presents a new testing technique developed to measure the concrete pore pressure at high confining pressure. This latter is generated by means of a high capacity GIGA press. The new concept consists in implementing a pressure sensor into a water collecting cap. This cap is designed specially to collect water from concrete subjected to mechanical confinement pressure. Experimental results show that concrete pore pressure can reach values of the order of the confining pressure.

【 授权许可】

CC BY