摘要
针对高温环境、高含泥量骨料、长距离输送严酷施工条件,以及高碱活性骨料应用、多离子作用的高侵蚀环境、高水头大泄量严酷运行条件下水工混凝土所面临的系列重大技术难题,本文从施工性能调控技术、碱骨料反应评价和抑制技术、抗侵蚀性能评价技术、磨蚀-空蚀作用评价和抗冲磨性能优化技术4个方面进行了系统探讨和总结.详述了保坍抗泥型聚羧酸系减水剂在混凝土中的长效保坍机制,碱骨料反应风险快速评价方法和"自免疫"机理及其抑制技术,氯离子扩散、硫酸盐侵蚀理论模型,以及磨蚀-空蚀试验设备、方法和优化技术.本研究成果丰富了水工混凝土性能调控理论与技术,可为重大工程科学决策提供重要的技术支撑.
In view of the series of major technical problems faced by hydraulic concrete in harsh construction and service conditions such as high temperature environment, high clay content aggregate, long distance transportation, high alkali activated aggregate application,high corrosive environment with multiple ions, high water head and large discharge, the technologies for construction performance control, the evaluation and inhibition of alkali aggregate reaction, the evaluation of corrosive resistance, and the effect evaluation and performance optimization of abrasion and cavitation are systematically explored and summarized herein. Furthermore, the long time slump-retaining mechanism of polycarboxylate superplasticizer with slump-retaining and clay-tolerance properties in concrete, the rapid risk assessment method of alkali aggregate reaction, the mechanism of self-immunity to alkali-aggregate reaction, the theoretical models of chloride ion diffusion and sulfate attack, as well as the equipment, method and optimization of abrasion and cavitation are expatiated. These study achievements enrich the theory and technology of hydraulic concrete performance control, and can provide important guarantee for scientific decision-making of major engineering.
作者
蔡跃波
唐修生
蒋林华
丁建彤
段国荣
白银
CAI YueBo;TANG XiuSheng;JIANG LinHua;DING JianTong;DUAN GuoRong;BAI Yin(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Research Center on New Materials in Hydraulic Structures of Ministry of Water Resources,Nanjing 210029,China;Nanjing R＆D Hi-Tech Co.,Ltd,Nanjing 210024,China;The College of Mechanics and Materials,Hohai University,Nanjing 210098,China)
出处
《中国科学：技术科学》
EI
CSCD
北大核心
2018年第10期1081-1091,共11页
Scientia Sinica(Technologica)
基金
国家自然科学基金(批准号:50539040和51372118)
国家重点研发计划(编号:2016YFC0401600)资助项目
关键词
严酷条件
水工混凝土
性能调控
碱骨料反应
侵蚀
harsh conditions
hydraulic concrete
performance control
alkali aggregate reaction
erosion
