高性能地铁混凝土管片的配合比设计及性能研究

Mix Proportion Design and Properties Research on High-performance Concrete for Subway Tunnel Segments

基于骨料最紧密堆积理论,提出了高性能地铁混凝土管片的配合比设计原则及计算步骤,通过试验确定了配合比计算中的相关参数。研究结果表明:与具有相同原材料的地铁管片混凝土相比,高性能地铁管片混凝土具有浆体体积用量更小,28d抗折强度、劈裂抗拉强度和弹性模量更高(即抗裂性好)、耐久性好、性价比高等性能。

Based on the theory of the most compact of aggregates, the principle and calculating steps of mix proportion design of high-performance concrete for subway tunnel segments are put forward, and the correlated parameters in calculating steps of mix proportion design are also determined by experiment. The research results show that the paste volume is smaller, and the bending strength, splitting tensile strength and elasticity modulus of concrete cured 28 days are higher for the concrete for high-performance subway tunnel segments compared with the eoncrete produced by the enterprise with the same raw materials.