负温增钙粉煤灰混凝土强度发展规律的研究  

Study on the strength development law of minus-temperature calcium-enriched fly ash concrete

作　　者：崔金江 赵亚丁[2] 朱卫中[3] 朱广祥[3] 

机构地区：[1]北京市住宅建设设备物资公司,北京100025 [2]哈尔滨工业大学,黑龙江哈尔滨150090 [3]黑龙江省寒地建筑科学研究院,黑龙江哈尔滨150080

出　　处：《混凝土》2012年第12期69-73,共5页Concrete

摘　　要：从利废、环保的角度出发结合增钙粉煤灰具有需水量低、活性高和可自硬的特征,研究了3种增钙粉煤灰掺量(42.8%、33.3%、23.8%)的负温混凝土在恒负温(-15℃)、恒负温转正温和自然变负温养护条件下的抗压强度的发展变化规律;同时分别利用X射线衍射和扫描电子显微镜技术,分析其不同龄期的水化程度及产物和显微结构,探讨其水化机理,为实际工程应用提供参考依据。Originally fi＇om waste recycling and environment protecting, combining to the characteristics of calcium-enriched fly ash, such as low water requirement, high activity and self-hardening property, compressive strength and dynamic modulus of elasticity development law of mi- nus-temperature calcium-enriched fly ash concrete （ amount of mixing were 42.8%, 33.3% and 23.8% ） were investigated under constant nega- tive temperature （- 15℃ ）, constant negative temperature changing to positive temperature and natural changed negative temperature curing sys- tem.And then, by using of XRD and SEM, the products of hydration and fine texture under different ages were analyzed.Discussed the principle of hydration;provided a reference for engineering application.

关 键 词：增钙粉煤灰 负温混凝土 抗压强度 XRD SEM 

分 类 号：TU528.041[建筑科学—建筑技术科学]