期刊
INTERNATIONAL JOURNAL OF THERMOPHYSICS
卷 30, 期 4, 页码 1310-1322出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10765-009-0609-z
关键词
Cement-based composites; Hybrid fiber reinforcement; Hygric properties; Mechanical properties; Thermal load; Thermal properties
资金
- Ministry of Education, Youth and Sports of the Czech Republic [6840770031]
The tensile strength, bending strength, water vapor diffusion resistance factor, gas permeability, thermal conductivity, specific heat capacity, and linear thermal expansion coefficient of a cement-based composite with hybrid PVA-fiber reinforcement are determined as functions of thermal pre-treatment, the loading temperatures being 600 A degrees C, 800 A degrees C, and 1000 A degrees C. The experimental results show that the most important changes in all studied parameters occur between the unloaded state and the loading temperature of 600 A degrees C and then between 800 A degrees C and 1000 A degrees C. Although seemingly high, these changes are still small as compared to many other cement-based composites. The positive effect of using PVA fibers for the high-temperature behavior of the studied composite can be seen mainly in their ability to prevent thermal spalling which is a serious deterioration effect for cement-based composites.
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