原状磷石膏用作混凝土添加剂的性能研究  

Study on the properties of additives in undisturbed phosphogypsum concrete

作　　者：于万增 潘俊廷 朱会荣[1] 温永钦[1] YU Wanzeng;PAN Junting;ZHU Huirong;WEN Yongqin(College of Materials Science and Engineering,Jilin Jianzhu University,Changchun 130118,China)

机构地区：[1]吉林建筑大学材料科学与工程学院,吉林长春130118

出　　处：《新型建筑材料》2020年第4期28-30,42,共4页New Building Materials

基　　金：吉林省科技发展计划项目(20190303028SF);吉林省大学生创新创业计划训练项目(8570051204)。

摘　　要：在C30混凝土基准配合比的基础上,内掺占胶凝材料总质量1.0%~6.0%的磷石膏,研究了磷石膏掺量对混凝土坍落度及经时损失、胶凝材料膨胀性能、矿物掺合料活性指数和抗压强度的影响。结果表明,磷石膏对混凝土具有缓凝和膨胀作用,可以激发矿物掺合料的活性,其在C30混凝土中的最佳掺量为3.0%~4.0%,研究结果为提高磷石膏资源化利用水平开辟一条新径。Phosphorus gypsum which accounts for 1%~6% of the total cementing material was added based on the benchmark mix ratio of C30 concrete.The influence of phosphogypsum mixing amount on the concrete slump loses through time,expansion performance of cementitious material,activity index of mineral admixture and the compressive strength of concrete were analyzed.The results show that phosphogypsum has the effect of retarding and expanding on the concrete,which can stimulate the activity of mineral admixture,and the optimum content in C30 concrete is 3%~4%,which is a new way to improve the utilization level of phosphogypsum.

关 键 词：混凝土 磷石膏 缓凝作用 膨胀作用 活性激发 

分 类 号：TU528.04[建筑科学—建筑技术科学]