废弃玻璃粉在复合胶凝材料水化硬化过程中的作用机理及ASR风险研究

项目名称： 废弃玻璃粉在复合胶凝材料水化硬化过程中的作用机理及ASR风险研究

项目编号： No.51208391

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 刘数华

作者单位： 武汉大学

项目金额： 25万元

中文摘要： 废弃玻璃粉作为一种新型潜在辅助胶凝材料，既能改善混凝土性能、降低成本，又具有重要的生态环境效益。由于玻璃粉具有某些独特的材料性质，导致复合胶凝材料的水化硬化机制发生改变，而当前对玻璃粉的作用机理、复合胶凝体系的水化动力学机制及ASR风险尚不明确。为此，本申请项目将研究不同条件下玻璃粉-硅酸盐水泥复合胶凝体系的水化产物和浆体微结构的形成与演化，明确玻璃粉的水化特性及其对胶凝体系水化的影响；依据不同条件下复合胶凝材料的水化速率、玻璃粉的反应速率和程度，确定水化硬化进程，构建胶凝体系水化程度的预测模型及水化动力学方程，揭示胶凝体系化学反应的宏观和微观机理以及玻璃粉在不同水化阶段的作用机制；确定玻璃粉发生火山灰反应或ASR的条件，完善玻璃粉化学反应模型，分析ASR风险。通过本项目研究，深化对玻璃粉作用机理的认识，不仅有利于废弃玻璃的高效回收利用，而且为其在混凝土中的合理应用提供科学依据。

中文关键词： 废弃玻璃粉；复合胶凝材料；水化特性；作用机理；碱-硅反应

英文摘要： As a new potential supplementary cementitious materials, waste glass powder not only can improve the properties of concrete and reduce the cost, but also has important ecological and environmental benefits. Glass powder has some unique characteristics, which leads to the change in hydration and hardening mechanisms of composite cementitious materials, however, the effect mechanisms of glass powder, the hydration kinetic mechanism of composite cementitious system and its Alkali-Silica Reaction (ASR) risk are not known clearly. Therefore, in this project, the formation and changing of hydration products and microstructure of glass powder-Portland cement composite system at different conditions will be investigated, and then the hydration properties of glass powder and its effect on hydration of the system will be confirmed; based on the hydration rate of composite cementitious material, the reaction rate and degree of glass powder at different conditions, the hydration and hardening process will be determined, and the prediction model of hydration degree and hydration kinetic equation of composite system will be established, which will reveal the macroscopic and microscopic mechanism of the chemical reaction of cementitious system and the effect mechanisms of glass powder at various hydration periods; the chemical

英文关键词： waste glass powder；composite cementitious materials；hydration properties；effect mechanism；alkali-silica reaction