快硬型水下不分散剂水下混凝土裂缝修补应用研究  

Research on application of fast-hardening underwater non-dispersant agent for underwater concrete crack repair

作　　者：王冬[1,2,3,4] 樊金光 唐修生 石明建[2,3,4] WANG Dong;FAN Jinguang;TANG Xiusheng;SHI Mingjian(Nanjing Hydraulic Research Institute,Nanjing 210024,China;Nanjing R&D Hi-Tech Co.Ltd.,Nanjing 211161,China;Research Center on New Materials in Hydraulic Structures,Ministry of Water Resources,Nanjing 210024,China;Anhui R&H New Materials Co.Ltd.,Anhui Academician Workstation,Maanshan 238281,China;Ningbo Hangtong Prefabricated Components Co.Ltd.,Ningbo 315221,China)

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]南京瑞迪高新技术有限公司,江苏南京211161 [3]水利部水工新材料工程技术中心,江苏南京210024 [4]安徽瑞和新材料有限公司安徽省院士工作站,安徽马鞍山238281 [5]宁波航通预制构件有限公司,浙江宁波315221

出　　处：《新型建筑材料》2021年第9期138-140,共3页New Building Materials

基　　金：科技部“科技助力经济2020”重点专项(SQ2020YFF0426367)。

摘　　要：研究了快硬型水下不分散剂在不同水胶比、不同掺量条件下对灌浆料水上/水下性能的影响,确定了水下混凝土裂缝缺陷修补灌浆料配合比方案。研究结果表明:快硬型水下不分散剂配制的水下灌浆料可灌性好,水下1~3 h内可终凝,水陆7、28 d抗压强度比分别>80%、>90%,0~4℃配制水下大流动度灌浆料7 d抗压强度>25 MPa,28 d抗压强度>60 MPa,粘结性能优良。The influence of fast hardening underwater non-dispersant on the surface/underwater properties of grouting material under different water-binder ratios and different mixing amounts was studied,and the grouting material mix ratio scheme for repairing the cracks and defects of underwater concrete was determined.The results show that the underwater grouting material prepared with fast-hardening underwater non-dispersant agent can be filled well,and can be final set within 1~3 h underwater,the 7 d and 28 d compressive strength ratio of water and land is greater than 80% and 90% respectively.The 7 d compressive strength and 28 d compressive strength of underwater high-fluidity grouting material prepared under 0~4℃ is greater than 25 MPa and 60 MPa,respectively,the bonding performance is excellent.

关 键 词：快硬 水下不分散剂 水下混凝土 裂缝修补 

分 类 号：TU528.32[建筑科学—建筑技术科学]