【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。更多还原

【Abstract】 Originally from 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 minus-temperature calcium-enriched fly ash concrete(amount of mixing were 42.8%,33.3% and 23.8%) were investigated under constant negative temperature(-15 ℃),constant negative temperature changing to positive temperature and natural changed negative temperature curing system.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.更多还原