High Temperature Performance of High Volume Fine Mineral Mixture of Reactive Powder Concrete

This paper researches the burst properties of high temperature and compressive strength after heating of high volume fine mineral mixture of reactive powder concrete.Results show that with the decrease of the water-cement ratio,the burst temperature of the specimen decreases and the burst probability increases.The initial time and temperature of high-temperature burst decrease with increasing amount of fine mineral mixture.Polypropylene fiber can effectively improve the anti-burst performance of reactive powder concrete.Reactive powder concrete after 200 ℃ heating can increase the compressive strength.In addition,adding polypropylene fiber can improve the compressive strength of reactive powder concrete and residual strength ratio in the range of 200 ℃.