摘要
采用聚合物对水淬锰渣包覆改性,将包覆改性后水淬锰渣与玻化微珠组成复合骨料制备复合保温砂浆。研究了包覆改性溶液对水淬锰渣吸水率的影响,改性锰渣掺量、胶凝材料配合比以及发泡剂掺量对保温砂浆性能的影响;利用SEM分析改性前后锰渣表面形貌的变化和胶凝材料水化产物的形貌。试验结果表明:使用质量比为1∶3的苯丙乳液与有机硅母液作为复合改性溶液时,改性锰渣的吸水率为5.34%,憎水效果最好;复合保温砂浆中,改性锰渣最佳外掺量为75%,锰渣微粉与粉煤灰的最佳比例为4∶1,发泡剂最佳掺量为0.1%,制备的复合保温砂浆28 d抗压强度为1.1 MPa、干密度为436 kg/m^(3)、导热系数为0.079 W/(m·K),符合《无机轻集料砂浆保温系统技术规程》(JGJ 253—2011)中Ⅱ型砂浆的要求。
The polymer was used for modification of water quenching manganese slag,The composite thermal insulation mortar was prepared by composite aggregate composed of coating modified water quenching manganese slag and glazed hollow bead.The effects of modified solution on the water absorption of water quenching manganese slag were studied.The effects of the amount of modified manganese slag,cementitious material ratio and the amount of foaming agent on the properties of the thermal insulation mortar were analyzed.The changes in pore structure of manganese slag after modification and microstructure of the cementitious material hydration products were analyzed by SEM.The test results show that the water absorption of modified manganese slag is 5.34%when using a 1∶3 mass ratio of styrene-acrylic emulsion and silicone hydrophobic agent as a compound modified solution,and hydrophobic effect is the best.In composite thermal insulation mortar,the optimum content of modified manganese slag is 75%,the optimal ratio of manganese slag powder to fly ash is 4∶1 and the optimal content of foaming agent is 0.1%.The 28 d compressive strength with dry density and thermal conductivity of the composite thermal insulation mortar will be 1.1 MPa,436 kg/m^(3)and 0.079 W/(m·K),respectively.The main performance parameters all meet typeⅡstandard requirements in Technical Specification for Thermal Insulating Systems of Inorganic Lightweight Aggregate Mortar(JGJ 253—2011).
作者
张建兵
刘荣进
刘朝
梁海区
陈平
ZHANG Jian-bing;LIU Rong-jin;LIU Zhao;LIANG Hai-qu;CHEN Ping(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin University of Technology,Guilin 541004,China;Guangxi Beibu Gulf Engineering Research Center for Green Marine Materials,Guilin University of Technology,Guilin 541004,China;Guangxi Yufeng Concrete Co.,Ltd.,Liuzhou 545008,China)
出处
《桂林理工大学学报》
CAS
北大核心
2021年第4期817-822,共6页
Journal of Guilin University of Technology
基金
广西重点研发计划项目(桂科AB17129014,桂科AB19259008,桂科AB18126070)
广西科技重大专项子课题(广西创新驱动发展专项)(桂科AA18242007-3)。
关键词
水淬锰渣
保温砂浆
包覆改性
工业废渣
water quenching manganese slag
thermal insulation mortar
coating modification
industrial waste slag
