摘要
针对高寒山区环境下,用于工程建筑的机制砂混凝土极易发生冻融破坏和腐蚀破坏的现象,引入高性能矿物掺合料对其耐久性能进行改性,分别研究了粉煤灰和矿渣微粉两种矿物掺合料在单掺和复掺条件下对C40机制砂混凝土抗冻及抗渗性能的影响,并结合其界面区形貌和孔结构进行了微观机理分析.研究结果表明:粉煤灰与矿渣微粉复掺能够显著提升C40机制砂混凝土的耐久性能,两者复掺对C40机制砂混凝土耐久性能的改善提升作用要优于两者单掺;以质量分数为21%粉煤灰与质量分数为9%矿渣微粉复掺时,C40机制砂混凝土的早期抗冻、抗渗性能显著提高,后期抗冻、抗渗性能得到了大幅度提升,界面区形貌和孔结构得到显著改善.
To solve the serious freeze-thaw and corrosion damage of machine-made sand concrete for engineering construction in alpine areas,the mineral admixture with high performance was used to modify the durability. The incorporation effects of fly ash,flag powder and the mixtures on frost resistance and impermeability of C40 grade machine-made sand concrete were analyzed. The micro-mechanism was discussed based on the interfacial zone morphology and pore structure. The results show that the mixing of fly ash and flag powder can significantly improve the durability of C40 grade machine-made sand concrete better than the single one. Mixing with 21% fly ash and 9% flag powder,the frost resistance and the impermeability of C40 grade machine-made sand concrete are greatly improved in both early and late stages,and the interfacial zone morphology and pore structure are significantly improved.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第1期115-119,共5页
Journal of Jiangsu University：Natural Science Edition
基金
交通运输部建设科技项目(2013318J16490)
四川省交通科技项目(2011A7-4-1)
