水泥细度对混凝土损伤自修复能力的影响  

Effect of cement fineness on self-healing ability of concrete

作　　者：李志强 LI Zhiqiang(Anhui Conch Building Materials Design and Research Institute Co.LTD.,Wuhu 241002,Anhui,China)

机构地区：[1]安徽海螺建材设计研究院有限责任公司,安徽芜湖241002

出　　处：《水泥》2022年第9期16-18,共3页Cement

摘　　要：基于水泥中粗颗粒水化周期长的特点,通过制备粗颗粒水泥并按照一定比例掺入成品水泥,借助超声无损检测技术,开展水泥细度对混凝土损伤自修复能力的影响研究。结果表明:粗颗粒水泥对混凝土损伤自修复起到积极作用,当粗颗粒水泥比表面积为250 m^(2)/kg、掺量为15%时,抗压强度增长率最大,超声波波速的增长率最大,混凝土损伤自修复能力最强。Based on the characteristics of long hydration cycle of coarse particles in cement,the influence of cement fineness on self-repairing ability of concrete was studied by preparing coarse particles cement and mixing it into finished cement in a certain proportion with the help of ultrasonic nondestructive testing technology.The results showed that coarse particle cement plays a positive role in the self-healing of concrete.When the content of coarse particle cement was 15%and the specific surface area of cement was 250 m^(2)/kg,both the growth rate of compressive strength and ultrasonic wave velocity were the largest,and the self-healing ability of concrete was the strongest.

关 键 词：水泥细度 粗颗粒 水化 损伤 自修复 

分 类 号：TQ172.12[化学工程—水泥工业] TU528.01[化学工程—硅酸盐工业]