水工混凝土抗硫酸盐侵蚀性能改善研究  

Improvements of sulfate attack resistant property of hydraulic concrete

作　　者：冯小忠 刘胜松 唐修生[2,3] 黄国泓[2,3] 祝烨然[2,3] 

机构地区：[1]江苏省水利工程建设局,江苏南京210029 [2]南京水利科学研究院瑞迪高新技术有限公司,江苏南京210024 [3]江苏省瑞迪水工新材料工程技术研究中心,江苏南京210024

出　　处：《混凝土》2014年第5期41-43,48,共4页Concrete

摘　　要：通过测定砂浆试件的抗蚀系数、膨胀率、混凝土试件的质量变化来探讨大掺量磨细矿渣、膨胀剂对水工混凝土抵抗硫酸盐侵蚀能力的影响,并利用压汞(MIP)测孔技术对大掺量磨细矿渣、膨胀剂改善混凝土抗硫酸盐侵蚀性能的内在原因进行了初步分析。结果表明:大掺量磨细矿渣、膨胀剂的加入,能够显著提高混凝土的抗硫酸盐侵蚀能力,细化了硬化浆体的孔结构,使硬化水泥浆体中的中、大孔所占份额减少,小孔所占份额增加;磨细矿渣、膨胀剂等量取代水泥后显著提高了抗蚀系数、降低了砂浆的膨胀率、缓解了侵蚀后期混凝土质量的急剧损失状况。Affects of high volume of ground slag and expansion agent on the sulfate attack resistant property of hydraulic concrete were discussed by the examinations of the corrosion resistance coefficient, expansion ratio and the mass change of concrete specimens.Intrinsic causes of the improvements of sulfate attack resistant property of hydraulic concrete were analyzed by mercury intrusion prorosimentry （MIP）.It is shown that the sulfate attack resistant property of concrete improved obviously, the pore structures of harden paste refined, middle and large pore percent reduced, small pore percent increased, the corrosion resistance coefficient improved, the expansion ratio of mortar decreased, and the sharp decrease status of concrete mass in the course of the later corrosion age relieved with high volume of ground slag and expansion agent.

关 键 词：水工混凝土 硫酸盐侵蚀 磨细矿渣 膨胀剂 压汞法 

分 类 号：TU528.01[建筑科学—建筑技术科学]