硅烷偶联剂改性超细粉煤灰增强泡沫混凝土防水和隔热性能研究  

Waterproof and Thermal Insulation Performance Study of Foam Concrete Reinforced by Ultrafine Fly Ash Modified by Silane Coupling Agent

作　　者：李阳春 庞雪飞 LI Yang-chun;PANG Xue-fei(Zhanjiang University of Science and Technology,Zhanjiang 524084,China)

机构地区：[1]湛江科技学院,广东湛江524084

出　　处：《塑料科技》2024年第12期77-80,共4页Plastics Science and Technology

基　　金：2019年广东海洋大学寸金学院校级科研项目(CJKY201905);2019年广东省本科高校教学质量与教学改革工程建设项目(ZLGC2017001);2022年湛江市非资助科技攻关计划项目(2022B01230)。

摘　　要：研究通过硅烷偶联剂改性粉煤灰制作泡沫混凝土,探究改性粉煤灰添加量对泡沫混凝土防水和保温性能的影响。结果显示,当硅烷偶联剂改性粉煤灰的添加质量分数为1.5%时,泡沫混凝土的干密度较未添加改性粉煤灰的混凝土降低5.85%,孔隙率增加3.67%,吸水率降低23.62%,导热系数达到最低,为0.029 W/(m·K)。因此,适量添加改性粉煤灰能够有效改善泡沫混凝土的保温性能和防水性能,但泡沫混凝土的力学性能有小幅度的损失。硅烷偶联剂改性粉煤灰的添加质量分数为1.5%可以在改善保温性能的同时尽量保持泡沫混凝土的抗压强度。The study involves the preparation of foam concrete using fly ash modified by silane coupling agents,and investigates the effects of the amount of modified fly ash added on the waterproof and thermal insulation performance of the foam concrete.The results showed that when the mass fraction of silane coupling agent modified fly ash was 1.5%,the dry density of foam concrete decreased by 5.85%,the porosity increased by 3.67%,the water absorption decreased by 23.62%,and the thermal conductivity reached the lowest,0.029 W/(m·K).Therefore,the proper addition of modified fly ash can effectively improve the thermal insulation performance and waterproof performance of foam concrete,but lead to a small loss of the mechanical properties of foam concrete.The 1.5%addition mass fraction of silane coupling agent can improve the thermal insulation performance and try to maintain the compressive strength of foam concrete.

关 键 词：硅烷偶联剂 超细粉煤灰 泡沫混凝土 防水性能 隔热性能 

分 类 号：TU528[建筑科学—建筑技术科学]