电阻率法研究粉煤灰掺量对低热水泥水化进程的影响  

Influence of Fly Ash Content on the Hydration Process of Low-heated Cement by Resistivity Method

作　　者：焦雪梅 谢刚川 秦灿 JIAO Xuemei;XIE Gangchuan;QIN Can(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》2020年第12期124-128,共5页Water Power

摘　　要：采用电阻率测试仪分别对普通硅酸盐水泥、高抗硫水泥及单掺和未掺粉煤灰条件下的低热水泥水化的电阻率进行测试。对比分析3种水泥早期水化差异,并揭示粉煤灰掺量对低热水泥基胶凝体系水化进程的影响机理。试验结果表明:在水化早期,低热水泥浆体的电阻率随粉煤灰掺量的增加而增大;在水化后期,电阻率随粉煤灰掺量的增加而减小;与普通硅酸盐水泥和高抗硫水泥相比,低热水泥在水化早期电阻率值最小,而在水化后期电阻率值最大。The resistivity tester is used to test the hydration resistivity of ordinary Portland cement,high-sulfur cement,and low-heat cement with and without fly ash content respectively.The early hydration differences of the three types of cements are compared and analyzed,and then the influence mechanism of fly ash content on the hydration process of low-heat cement-based cementing systems is revealed.The test results show that the resistivity of low-heat cement paste increases with the increase of fly ash content in the early stage of hydration,and moreover,the resistivity decreases with the increase of fly ash content in the later stage of hydration.Compared with ordinary Portland cement and high-sulfur cement,the low-heat cement has the smallest resistivity value in the early stage of hydration and the largest resistivity value in the later stage of hydration.

关 键 词：电阻率 粉煤灰 低热水泥 水化进程 影响 

分 类 号：TV423[水利工程—水工结构工程]