大掺量矿物掺和料普通硅酸盐水泥基胶凝材料体系水化放热分析  

Exothermic Analysis of Hydration for Ordinary Portland Cement-based Cementitious Systems with High Volume Mineral Admixtures

作　　者：焦雪梅 秦灿 宫经伟[2] 朱鹏飞[2] 姜春萌 JIAO Xuemei;QIN Can;GONG Jingwei;ZHU Pengfei;JIANG Chunmeng(China Renewable Energy Engineering Institute,Beijing 100120,China;College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,Xinjiang,China)

机构地区：[1]水电水利规划设计总院,北京100120 [2]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052

出　　处：《水力发电》2019年第11期130-134,共5页Water Power

摘　　要：胶凝材料水化放热是造成大体积混凝土温度裂缝的主要原因之一,工程中多采用低热水泥或掺加矿物掺和料的普通水泥基胶凝材料的方法降低水化热,而目前关于二者水化放热规律的对比研究较少。为此,采用电阻率测定仪对普通硅酸盐水泥与低热水泥的电阻率进行测量,对比分析两者在水化进程、水化速率、水化放热量、水化加速期与减速期持续时间方面的规律;同时,采用直接法,对不同掺量粉煤灰、矿渣条件下,普通硅酸盐水泥基胶凝材料与低热硅酸盐水泥的水化热进行了测试和对比分析。The hydration exothermic heat of cementitious materials is the main cause of temperature cracks of mass concrete.In engineering,low heat Portland cement and ordinary Portland cement-based cementing material with mineral admixtures are mostly adopted to reduce hydration heat.At present,there are few comparative studies on the hydration heat release laws of the twos.In view of this,the resistivity of ordinary Portland cement and low heat Portland cement is measured by non-contacting electrical resistivity meter,and the laws of hydration process,hydration heat release rate,hydration heat release,hydration acceleration period and deceleration period duration are compared and analyzed.The hydration heat of ordinary Portland cement base cementing materials and low heat Portland cement with different fly ash and slag content are also measured and analyzed by direct method.

关 键 词：大掺量矿物掺和料 普通硅酸盐水泥 低热水泥 胶凝材料体系 水化热 

分 类 号：TQ172.73[化学工程—水泥工业] TV421.5[化学工程—硅酸盐工业]