Application of ultra-high performance concrete with coarse aggregate
In order to meet the market demand of lightweight and high strength bridge panel materials in bridge engineering,ultra-high performance concrete with coarse aggregate was prepared by mixing coarse aggregate with reactive powder concrete with particle size less than 8mm.This kind of concrete has the characteristics of good mechanical properties,light material weight,early shrinkage and low cost.Firstly,the preparation principle of ultra-high performance concrete with coarse aggregate and the influence of various admixtures on its performance are described.Secondly,its mechanical properties,fatigue properties and high-temperature properties are analyzed.Finally,the engineering application status of ultra-high performance concrete in Nanjing Jiangxinzhou Yangtze River Bridge is demonstrated,and the problems to be further studied and the development direction are put forward.
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