基于不同外掺材料改善混凝土抗裂性能研究进展  

Research progress on improving cracking resistance of concrete based on different external admixture materials

作　　者：李福贵 Li Fugui(Qinghai Traffic Engineering Technology Service Center,Xining 810001,China)

机构地区：[1]青海省交通工程技术服务中心,西宁810001

出　　处：《青海交通科技》2024年第4期151-158,共8页Qinghai Transportation Science and Technology

摘　　要：近年来,随着我国沿海平原地区基建工程的饱和,基建重心开始向内陆高原山区转移。由于高原山区气候条件恶劣,对混凝土的设计要求也越来越高。目前混凝土在实际应用中依旧存在前期水化速率快、钢筋锈蚀、冻融损伤、强度倒缩、盐类腐蚀等问题,这些与混凝土的开裂息息相关。本文分别从膨胀混凝土、纤维增强混凝土和SAP内养护混凝土三个方向总结了混凝土的抗裂技术,最后从实际应用角度出发提出了未来混凝土抗裂技术可能的发展方向和研究热点,以期为相关人员提供科学参考。In recent years,with the saturation of infrastructure projects in my country’s coastal plains,the focus of infrastructure has begun to shift to inland plateau and mountainous areas.Due to the harsh climatic conditions in plateau and mountainous areas,the design requirements for concrete are becoming increasingly higher.At present,concrete still has problems such as fast initial hydration rate,steel corrosion,freeze-thaw damage,strength shrinkage,and salt corrosion in practical applications,which are closely related to the cracking of concrete.This article summarizes the anti-cracking technology of concrete from three directions:expansive concrete,fiber-reinforced concrete,and SAP internal curing concrete.Finally,from the perspective of practical application,it proposes the possible development direction and research hotspots of concrete anti-cracking technology in the future,in order to provide scientific reference for relevant personnel.

关 键 词：混凝土 收缩开裂 膨胀混凝土 纤维增强 超吸水性树脂 内养护 

分 类 号：TU528[建筑科学—建筑技术科学]