复杂环境下矿物掺合料混凝土的耐久性研究  

Study on Mineral Admixture Concrete Durability under the Complex Environment

作　　者：陈剑毅[1] 胡明玉[2] 肖烨[1] 李建平[1] 

机构地区：[1]东华理工大学土木与环境工程学院,南昌330013 [2]南昌大学建筑工程学院,南昌330031

出　　处：《硅酸盐通报》2011年第3期639-644,共6页Bulletin of the Chinese Ceramic Society

基　　金：东华理工大学校长基金资助项目(DHXK1007)

摘　　要：以粉煤灰、矿渣、硅藻土和沸石作为矿物掺合料,通过设计矿物掺合料种类和掺量对混凝土改性的正交试验,研究在氯盐-硫酸盐-冻融复杂环境下掺活性矿物掺合料混凝土的耐久性,并通过X射线衍射和扫描电子显微镜分析,探求矿物掺合料对混凝土改性的微观机理。研究表明,矿物掺合料能够抑制碳硫硅钙石晶体的生成和改善混凝土孔结构,从而明显提高混凝土的耐久性,其中硅藻土效果最佳。Using fly ash, slag, diatomite and zeolite as mineral admixtures, by designing orthogonal test with types and dosages of mineral admixtures for concrete improvement, to study the concrete durability adding various different active mineral admixtures under the complex conditions of chloride, sulfate and freeze-thaw erosion, to get the types and dosages of mineral admixtures of the best durability concrete by analyze of experimental results, with the aid of analysis methods such as X-ray diffraction and scanning electron microscope, study micro-mechanism of concrete improvement mixing mineral admixtures. The research results show that the mineral admixtures can restrict the formation of Thaumasite and improving the concrete pore structure, in order to improve evidently the concrete durabilyty, and diatomite is the best mineral admixture among them.

关 键 词：复杂环境 矿物掺合料 混凝土 耐久性 微观分析 

分 类 号：TU528[建筑科学—建筑技术科学]