Journal
MATERIALS
Volume 13, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/ma13173731
Keywords
self-compacting concrete; uniaxial compression; dynamic properties; experimental study; mechanism analysis
Categories
Funding
- Natural Science Foundation of Qinghai Province in China [2017-ZJ-933Q]
- National Natural Science Foundation of China [51769028]
- Science and technology projects of Ministry of housing and urban-rural development of China [2018-K9-054]
- key research and development projects in Hainan Province
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To investigate the dynamic performance of self-compacting concrete (SCC), the dynamic uniaxial compression tests at eight different loading strain rates were performed on the ordinary concrete and SCC cubic specimens. Based on the tests, the compression failure patterns and stress-strain curves of both kinds of concrete were obtained. The results show that SCC performs more brittle than ordinary concrete by showing the diagonal crack failure pattern of SCC at a high strain rate. Besides, with the increase of loading strain rate, the peak compressive stress of SCC is slightly lower than that of ordinary concrete, but the increase of elastic modulus is slightly higher than that of ordinary concrete. The peak compressive strains of the two kinds of concrete are discrete under the influence of loading strain rate, thus putting forward the relation equation for the loading strain rate and peak compressive stress increase coefficient of the two kinds of concrete. Besides, based on the theory of elastic-plastic damage and considering the dynamic extension of damage, the dynamic constitutive relation with good applicability between ordinary concrete and SCC was established.
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