掺合料对胶凝体系早期水化放热和力学特性的影响  

Effects of Mineral Admixtures on Early Hydration Heat and Mechanical Characteristic of Cementitious System

作　　者：钱文勋 陈迅捷[1,2] 韦华[1,2] 王新[1] 

机构地区：[1]南京水利科学研究院,210029 [2]水利部水工新材料工程技术研究中心,南京210029

出　　处：《混凝土与水泥制品》2017年第1期8-11,共4页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51479125;51479124);中央级公益性科研院所基本科研业务费专项资金(Y416011)

摘　　要：胶凝材料水化热是水工大体积混凝土的关键热学参数,直接影响水工混凝土的温控设计。本文采用热导式等温量热仪试验研究水泥基胶凝材料体系中各种掺合料对水泥水化放热过程的影响,结合其早期强度发展,探讨不同掺合料对水泥基胶凝材料体系早期放热过程和强度的影响规律,为大体积混凝土中掺合料的应用提供技术支撑。研究结果表明,选用的掺合料方案其早龄期水化放热量与对应的早期抗压强度有较好的线性相关,根据早期强度设计要求和水化热控制需要,优先考虑粉煤灰、矿渣粉单掺或者复掺方案。Hydration heat of cementitious materials is a key thermal parameter of hydraulic mass concrete. The tem- perature control design of hydraulic concrete is directly decided by it. In this paper, isothermal calorimeter was applied to study the effects of various blending materials on early hydration heat proceeding as well as early development of strength, which provided technical support of the mineral admixture utilization in mass concrete. Results indicated that there was a decent linear correlation between early hydration heat and compressive strength of the selected mineral admixture proportion. While in practical engineering application, considering the demands for early design strength and controlled hydration heat, fly ash, slag or their combined mix were suggested.

关 键 词：掺合料 早期 水化放热 

分 类 号：TU528.041[建筑科学—建筑技术科学]