市政技术2024，Vol.42Issue(3)：164-170,205,8.DOI:10.19922/j.1009-7767.2024.03.164
高抗折矿渣硫铝酸盐水泥混凝土抗疲劳性能研究
Fatigue Resistance Performance of High-Flexural-Strength Mineral Slag-Calcium Sulfoaluminate Cement Concrete
摘要
Abstract
The main problems of traditional cement concrete road surfaces include susceptibility to cracking,degra-dation,and poor fatigue resistance,a significantly shortened lifespan and severely hindered the development and application of cement concrete road surfaces.Slag-calcium sulfoaluminate cement(S-CSA)is a novel binding ma-terial with high flexural strength,which is applied in concrete road surfaces preparation and show the potential to address the poor fatigue performance in existing road surfaces.Through three-point bending fatigue tests and acoustic emission tests,the fatigue resistance of high-flexural-strength S-CSA concrete and ordinary portland cement(OPC)one was compared and analyzed.The research results indicate that high-flexural-strength S-CSA concrete has more coarse aggregate fracture events under the same loading conditions;With different strength grades,the fatigue life of high-flexural-strength S-CSA concrete surpasses that of OPC one,and significantly increase with the strength grade rises with the longest of approximately 7.2 times;The formation of ettringite effectively improves the interfacial transition zone,thereby enhancing the fatigue resistance of high-flexural-strength S-CSA concrete.关键词
高抗折矿渣硫铝酸盐水泥/抗疲劳性能/三点弯曲疲劳试验/声发射试验/微观形貌Key words
high-flexural-strength mineral slag-calcium sulfoaluminate cement/fatigue resistance/three-point bending fatigue test/acoustic emission test/microstructure分类
建筑与水利引用本文复制引用
李振中,马晨,龚博,李辉,皮振宇,徐名凤,周健..高抗折矿渣硫铝酸盐水泥混凝土抗疲劳性能研究[J].市政技术,2024,42(3):164-170,205,8.基金项目
河北省自然科学基金(52008151) （52008151）
