水泥特性对UHPC水化性能及抗压强度的影响分析  

Effect of Cement Properties on Hydration Performance and Compressive Strength of UHPC

作　　者：冯宇 FENG Yu(Shanghai Construction Group Co.,Ltd.,Shanghai 200080,China;Shanghai Engineering Research Center of Super High Rise Building Intelligent Construction,Shanghai 200080,China)

机构地区：[1]上海建工集团股份有限公司,上海200080 [2]上海超高层建筑智能建造工程技术研究中心,上海200080

出　　处：《建筑施工》2024年第7期993-995,1000,共4页Building Construction

基　　金：上海市博士后日常经费资助项目。

摘　　要：超高性能混凝土(UHPC)是一种新型水泥基复合材料,具有超高的力学性能、良好的材料韧性及优异的抗冲击性能与耐久性能。基于采用不同水泥制备的超高性能混凝土试件的试验研究,分析了水泥颗粒粒径、成分对UHPC体系水化放热速率和放热量、微观孔隙结构以及不同龄期抗压强度的影响规律,建立了水化动力学特性、微观孔隙结构以及宏观力学性能间的关联,揭示了水泥对UHPC水化动力学特性及力学性能的影响机理。Ultra-high performance concrete(UHPC)is a new type of cement-based composite material with ultra-high mechanical properties,good toughness,excellent impact resistance and durability.Based on the experimental study of ultra-high performance concrete specimens prepared with different cements,the effects of cement particle size and composition on the hydration exothermic rate and heat release,micro-pore structure and compressive strength at different ages of UHPC system are analyzed,and the relationship between hydration kinetics,micro-pore structure and macroscopic mechanical properties is established.The mechanism of the effect of cement on the hydration kinetics and mechanical properties of UHPC is revealed.

关 键 词：超高性能混凝土 水化动力学 临界孔隙入口半径 水化度 

分 类 号：TU528[建筑科学—建筑技术科学]