摘要
通过模拟实际项目工程中混凝土的存在环境,将搅拌成型的试块放入中等腐蚀性地下水中浸泡28 d进行试验研究。通过对浸泡后的混凝土进行抗压强度试验及MIP、XRD和电子扫描等微观试验来研究分析C02侵蚀混凝土的反应机理,研究C02侵蚀深度与混凝土强度及水胶比的关系,分析矿物掺合料对混凝土内部孔结构及抵抗CO_(2)侵蚀混凝土的反应机理。通过试验发现,抗压强度与CO_(2)侵蚀深度呈现负相关,抗压强度越高,侵蚀深度越浅,水胶比越大,侵蚀深度越深。混凝土内掺入适量的矿渣可以抵抗CO_(2)对混凝土的侵蚀,改善混凝土内部结构。
By simulating the existing environment of concrete in the actual project engineering,the specimen was immersed in moderately corrosive groundwater for 28 d.Through the compressive strength test of the immersed concrete and microscopic tests such as MIP,XRD and electronic scanning,the reaction mechanism of CO_(2) attack on concrete was studied and analyzed,the relationship between CO_(2) erosion depth and concrete strength,water-binder ratio was studied,and the reaction mechanism of mineral admixtures on concrete internal pore structure and resistance to CO_(2) corrosion was analyzed.The results showed that the compressive strength was negatively correlated with the depth of CO_(2) erosion.The higher the compressive strength was,the shallower the erosion depth was;the greater the water-binder ratio was,and the deeper the erosion depth was.Adding proper amount of slag into concrete can resist the CO_(2) erosion of concrete and improve the internal structure of concrete.
作者
葛辉
张启志
GE Hui;ZHANG Qi-zhi(Zhumadian Construction Project Quality Supervision Center,Zhumadian 463000,China;Huanghuai University,Zhumadian 463000,China)
出处
《当代化工》
CAS
2022年第4期782-785,共4页
Contemporary Chemical Industry
基金
国家自然科学基金(项目编号:51808509)
中国管理科学研究院基金(项目编号:ZGYGC1026)。
关键词
二氧化碳
微观孔结构
耐久性
抗压强度
CO2
Micro-pore structure
Durability
Compressive strength
