不同水灰比和养护龄期下高炉矿渣掺量对混凝土毛细孔结构的影响  

Influence of Blast Furnace Slag Content on the Pore Structure of Concrete under Different Water-Cement Ratio and Curing Age

作　　者：张树俊 黄冬辉[2] 杨兵 郑一夫 ZHANG Shu-jun;HUANG Dong-hui;YANG Bing;ZHENG Yi-fu(Nanjing Municipal Design and Research Institute Co. , Ltd. , Nanjing 210098, China;Jinling Institute of Technology, Nanjing 211169, China)

机构地区：[1]南京市市政设计研究院有限责任公司,江苏南京210098 [2]金陵科技学院建筑工程学院,江苏南京211169

出　　处：《金陵科技学院学报》2022年第1期79-84,共6页Journal of Jinling Institute of Technology

基　　金：江苏省基础研究计划青年基金项目(BK20160106);金陵科技学院智慧建造产业学院培育项目;金陵科技学院智慧建筑与建造产教融合示范基地培育项目。

摘　　要：目前高炉矿渣(BFS)混合混凝土在基础设施中被广泛应用。通过试验研究了高炉矿渣混合混凝土的毛细孔结构与抗氯离子渗透性能之间的关系。试验结果表明:1)BFS能够通过降低混凝土结构毛细孔的连通性和有害毛细孔的占比来优化BFS混合混凝土的毛细孔结构,进而影响BFS混合混凝土的抗氯离子渗透性能;2)水灰比(W/C)和养护龄期可通过影响最可几孔径和有害毛细孔的占比,进而影响BFS混合混凝土的抗氯离子渗透性能;3)BFS混合混凝土快速氯离子迁移系数与直径大于50 nm的有害毛细孔占比相关性较高,与毛细孔隙率和最可几孔径的相关性较弱。At present,blast furnace slag(BFS)mixed concrete is widely used in infrastructure.This paper studies the relationship between the pore structure and chloride penetration resistance of BFS mixed concrete.The test results show that:1)BFS can optimize the pore structure of BFS mixed concrete by reducing the connectivity of pores and the proportion of harmful pores,and then affect the chloride penetration resistance of BFS mixed concrete.2)Water-cement ratio(W/C)and curing age can affect the chloride penetration resistance of BFS mixed concrete by affecting the most probable pore diameter and the proportion of harmful pores.3)The rapid chloride ion migration coefficient of BFS mixed concrete has a high correlation with the proportion of harmful pores with diameter greater than 50 nm,but has a weak correlation with the capillary porosity and the most probable pore diameter.

关 键 词：高炉矿渣 水灰比 养护龄期 混凝土 毛细孔结构 

分 类 号：TU528.33[建筑科学—建筑技术科学]