碳化硼对超高性能混凝土准静态力学性能的影响分析  

Effect of boron carbide on quasi-static mechanical properties of UHPC

作　　者：丁庆军[1] 龚金华 周鹏[1] DING Qingjun;GONG Jinhua;ZHOU Peng(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《混凝土》2023年第5期1-4,共4页Concrete

基　　金：国家自然科学基金(U21A20149)。

摘　　要：碳化硼是一种高强集料,其掺量对超高性能混凝土(UHPC)的准静态力学性能有着很大影响。为了探究碳化硼掺量对UHPC准静态力学性能的影响规律。通过抗压强度、抗弯曲强度、弹性模量以及弯曲韧性等试验,以高钛重矿渣砂为基准砂,研究了不同碳化硼掺量UHPC的准静态力学性能。结果表明:碳化硼的加入有利于抗压强度和弹性模量的发展,但不利于弯曲韧性的发展,适量碳化硼和高钛重矿渣砂混掺可同时提升UHPC强度与韧性。Boron carbide is a kind of high-strength aggregate,and its admixtures have a significant impact on the quasi-static mechanical properties of ultra-high performance concrete(UHPC).To investigate the effect law of boron carbide doping on the quasi-static mechanical properties of UHPC.The quasi-static mechanical properties of UHPC with different boron carbide admixtures were investigated by compressive strength,flexural strength,elastic modulus,and flexural toughness tests using high titanium heavy slag sand as the reference sand.The results show that the addition of boron carbide is beneficial to the development of compressive strength and elastic modulus,but will reduce the flexural toughness,and the mixture of boron carbide and high titanium heavy slag sand can simultaneously improve the strength and toughness of UHPC.

关 键 词：超高性能混凝土 碳化硼 准静态力学性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]