复掺矿粉和粉煤灰对道路混凝土抗盐冻性能的影响  

Effect of Slag Powder and Fly Ash on Salt-Frost Resistance of Pavement Concrete

作　　者：伏永祥[1] 王睿[2] FU Yongxiang;WANG Rui(Department of Transportation Surveying and Mapping,Gansu Vocational and Technical College of Communications,Lanzhou Gansu 730207,China;School of Civil Engineering,Northwest Minzu University,Lanzhou Gansu 730070,China)

机构地区：[1]甘肃交通职业技术学院交通测绘系,甘肃兰州730207 [2]西北民族大学土木工程学院,甘肃兰州730070

出　　处：《当代化工》2024年第12期2839-2843,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:51508465);甘肃省高等学校创新基金项目(项目编号:2021B-462)。

摘　　要：盐冻破坏已成为当前混凝土工程最常见的破坏形式之一,掺入矿物掺合料是提高混凝土抗盐冻性能的有效措施。研究了单掺粉煤灰、矿粉以及复掺粉煤灰和矿粉对混凝土工作性能、强度和抗盐冻性能的影响规律,并分析其影响机制。结果表明:单掺粉煤灰会增大混凝土的坍落度和含气量,降低混凝土的强度,增大混凝土盐冻融循环下的质量损失率和强度损失率。与之相反的是,单掺矿粉则会减少混凝土的坍落度和含气量,提高混凝土的强度和抗盐冻性能。通过复掺粉煤灰和矿粉可以有效调控混凝土的坍落度和含气量,且在强度和抗盐冻性能方面,粉煤灰和矿粉的最佳复掺质量比为1∶1。The salt freezing destroy has become one of the most common forms of concrete destruction.Adding mineral admixtures is an effective measure to improve the salt-frost resistance of concrete.In this experiment,the effects of fly ash,slag powder and composite admixture of them on the workability,strength and salt-frost resistance of concrete were studied,and the influencing mechanism was also analyzed.The results showed that fly ash could increase the slump,gas content of concrete and reduce the strength of concrete,and meanwhile increase the quality loss rate and strength loss rate of concrete in the salt salt-frost environment.On the contrary,the addition of slag powder could reduce the slump,gas content of concrete and improve the strength,salt-freeze resistance of concrete.The slump and gas content of concrete could be controlled effectively by adding the composite admixture of fly ash and slag powder.In terms of strength and salt-freeze resistance,the optimum mass ratio of fly ash and slag powder was 1∶1.

关 键 词：粉煤灰 矿粉 工作性能 力学性能 抗盐冻性能 

分 类 号：TQ178[化学工程—硅酸盐工业] TU528[建筑科学—建筑技术科学]