期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：5
页码：1-8
DOI：10.1088/1755-1315/304/5/052085
出版社：IOP Publishing
摘要：Frost resistance performance of concrete is very important to hydraulic structures in cold regions. In this paper, the effects of mineral admixtures, fiber and the slag content on the frost resistance performance of concrete were studied by testing the weight loss and relative dynamic elasticity modulus. At the same time, the microstructure of high frost resistance concrete was analyzed. Results show that the weight loss rate of high performance concrete with mineral admixtures and fiber is reduced by 65% and the relative dynamic elasticity modulus retention rate is increased by 12% after 300 freeze-thaw cycles comparing to single mineral admixture concrete. A decrease in weight loss rate and an increase in relative dynamic elasticity modulus retention rate with increased slag content are observed in the double-mixture and triple-mixture concrete. The concrete with the excellent freeze-thaw cycle resistance performance can be prepared by air entraining agent, fly ash, slag, silica fume and polypropylene fiber. The maximum amount of the admixture can reach 51%, which can reduce the cost and meet the demand for concrete in cold regions.
