混凝土早强剂的作用机理及应用现状  

The Mechanism and Application of Concrete Hardening Accelerator

作　　者：吴蓬[1] 吕宪俊[1] 梁志强[1] 朱成志[1] 陈亚楠[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266590

出　　处：《金属矿山》2014年第12期20-25,共6页Metal Mine

基　　金：国家自然科学基金项目(编号:50974082;51406106);山东科技大学科研创新团队支持计划项目(编号:2012KYTD102)

摘　　要：混凝土早强剂是一种可以加速混凝土早期强度发展的外加剂,对于加快工程进度,提高工程作业的周转率有重要作用,其掺量一般不会超过水泥质量的5%。首先对目前早强剂的种类和用量进行分类归纳,将早强剂分为无机早强剂、有机早强剂和复合早强剂三大类,并归纳每类早强剂的主要组分和掺加量;其次,对不同种类早强剂的作用机理进行归纳总结,从理论上解释早强剂是如何提高水泥的水化反应速度,加速水泥浆体的凝结和硬化,为今后早强剂的研制及复配提供理论依据;最后,着重分析了不同研究者对早强剂应用性能的研究,指出目前早强剂存在的问题,指明今后早强剂的研究和发展方向,特别是要加强目前研究较为薄弱的低浓度低灰砂比胶凝体系早强剂的研究。Concrete hardening accelerator is a kind of admixture which can accelerate the early strength development of concrete. It＇s very important for speeding up the construction schedule and improving velocity of engineering operations. Its content is generally not more than 5% of the mass of cement. Hardening accelerator is divided into inorganic,organic,composite hardening accelerators,and the component and dosage of each one are induced. In order to provide theoretical foundation for the development and combination of hardening accelerators,the mechanism of different hardening accelerators is summarized,which can explain how to improve the hydration reaction speed of the cement,and accelerate the setting and hardening of cement paste by the hardening accelerator in theory. Further,the current problems are concluded through analyzing the application properties of hardening accelerators,and the development direction is pointed out. Especially,the hardening accelerator with low concentration and low cement-sand ratio cementitious system should be emphasized.

关 键 词：无机早强剂 有机早强剂 复合早强剂 作用机理 应用性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]