摘要
通过实验和理论分析,研究了粉煤灰活化措施、基本效应以及粉煤灰混凝土的工作性、力学特性和耐久性,为粉煤灰混凝土的应用和研究提供参考.研究认为机械活化措施中细磨加工优于分选加工,细磨加工能提高粉煤灰的活性和利用率;强碱激发剂的掺量要适量,引入硫酸盐复合激发剂是必要的,也是有效的,水泥是粉煤灰最有效、最经济的活性激发剂;粉煤灰的作用机理主要有取代效应、火山灰效应、形态效应和微集料效应等;粉煤灰使混凝土的工作性得到改善,早期强度低,后期强度增长快,抗拉强度明显提高,抗裂性、抗渗性、抗冻性、耐蚀性、抗碳化性和对钢筋的保护能力提高,水化热降低,能消除或减轻碱骨料反应的危害.
The activation measure and basic effect of fly ash were studied,as well as the workability,mechanical character and durability of concrete by experiment and theory analysis,for supplying reference for the application and study of fly ash concrete. In mechanical activation measure,fine abrade preceded sifting. Fine abrade could advance the activation and using ratio of fly ash. The mixing quantity of alkali should be suitable. Sulfate is necessary and effective. Cement is the most effective and economical activator. There are some main effects of fly ash,such as replacement,eruption,shape and tiny aggregate. Fly ash enables the workability of concrete to improve,tensile strength and durability to increase.
出处
《宁夏工程技术》
CAS
2005年第1期90-92,96,共4页
Ningxia Engineering Technology
基金
宁夏大学自然科学基金资助项目(033).
