李 响1,王佳男1,胡江海1,付文翔1,徐 方2,*
李响,王佳男,胡江海,等.基于复合胶凝材料体系的超高性能混凝土性能研究[J].混凝土与水泥制品,2024(2):1-5.
LI X,WANG J N,HU J H,et al.Research on performance of ultra-high performance concrete based on composite cementitious material system[J].China Concrete and Cement Products,2024(2):1-5.
基于复合胶凝材料体系的超高性能混凝土性能研究
李 响1,王佳男1,胡江海1,付文翔1,徐 方2,*
李响,王佳男,胡江海,等.基于复合胶凝材料体系的超高性能混凝土性能研究[J].混凝土与水泥制品,2024(2):1-5.
LI X,WANG J N,HU J H,et al.Research on performance of ultra-high performance concrete based on composite cementitious material system[J].China Concrete and Cement Products,2024(2):1-5.
摘 要:针对桥梁伸缩缝过渡区频繁出现的混凝土破损问题,研发了一种用于桥梁伸缩缝过渡区修复的硅酸盐-硫铝酸盐复合水泥胶凝材料体系超高性能混凝土(UHPC),并对其性能及微观结构进行了研究;优选了硫铝酸盐水泥的掺入比例,在某公路伸缩缝修复工程中进行了实际应用。结果表明:合适掺量的硫铝酸盐水泥能够有效提高UHPC的综合性能;当硫铝酸盐水泥质量为水泥总质量的10%时,所制备的UHPC在实际修复工程中的应用效果较好,养护24 h后抗压强度已经达到40 MPa。
Abstract: In response to the frequent occurrence of concrete damage in the transition zone of bridge expansion joints, a ultra-high performance concrete(UHPC) based on silicate sulfoaluminate composite cement cementitious material system was developed for the repair of bridge expansion joint transition zone, and its performance and microstructure were studied. The mix proportion of sulfoaluminate cement was optimized, which was actually applied in a highway expansion joint repair project. The results show that a suitable amount of sulfoaluminate cement can effectively improve the comprehensive performance of UHPC. When the mass of sulfoaluminate cement is 10% of the total cement mass, the prepared UHPC has a good application effect in practical repair project, and the compressive strength has reached 40 MPa after 24 h curing.
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