再生微粉泡沫保温材料的制备及性能研究  

Preparation and Properties of Foam Insulation Material with Recycled Powder

作　　者：姚田帅 田青 张苗 祁帅 王成 许鸽龙 蔡基伟 YAO Tianshuai;TIAN Qing;ZHANG Miao;QI Shuai;WANG Cheng;XU Gelong;CAI Jiwei(School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,China;State Key Laboratory of Green Building Materials,Beijing 100024,China;Anhui Institute of Strategic Study of Carbon Emissions Peak and Carbon Neutrality in Urban-Rural Development,Hefei 230601,China)

机构地区：[1]河南大学土木建筑学院,开封475004 [2]绿色建筑材料国家重点实验室,北京100024 [3]安徽省建设领域碳达峰碳中和战略研究院,合肥230601

出　　处：《硅酸盐通报》2023年第1期222-230,共9页Bulletin of the Chinese Ceramic Society

基　　金：绿色建筑材料国家重点实验室开放基金(2021GBM01);河南省高等学校重点科研项目计划(22B560002);安徽省建设领域碳达峰碳中和战略研究院开放课题(AHSTY-2022-02)。

摘　　要：采用湿泡沫拌合法以再生微粉(RP)为主要原料制备了泡沫保温材料,通过测量泡沫的稳定时间、浆体的流动特性与凝结过程,结合试件的抗压强度、干密度、孔隙率以及导热系数等指标,探讨了浆体组成对泡沫存活状态的影响规律以及RP的最大掺量。结果表明:泡沫的稳定性与浆体的黏度、凝结过程存在适宜的匹配状态,当水固比为0.80、浆体黏度为1.7 Pa·s左右、终凝时间小于30 min时,预制泡沫具有较好的存活状态;RP的最大掺量可达70%,所制备泡沫保温材料的抗压强度为1.15 MPa,导热系数为0.118 W/(m·K),符合JG/T 266—2011泡沫混凝土标准A06等级要求。Foam insulation material was prepared by recycled powder(RP)using wet foam mixing method.The effect of slurry composition on foam survival state was discussed by measuring foam stability time,slurry setting process,compressive strength,dry density,porosity and thermal conductivity.The maximum content of RP was also investigated.The results show that there is a suitable matching state between the stability of foam and the viscosity and setting process of slurry.The preformed foam has a good survival state when the water to solid ratio is 0.80,the viscosity of slurry is about 1.7 Pa·s,and the final setting time of slurry is less than 30 min.The maximum content of RP can reach 70%.The compressive strength of prepared foam insulation material is 1.15 MPa,and the thermal conductivity is 0.118 W/(m·K),which meet the requirements of JG/T 266—2011 foam concrete standard A06 grade.

关 键 词：再生微粉 泡沫保温材料 废弃混凝土 孔径分布 抗压强度 导热系数 

分 类 号：TU528.42[建筑科学—建筑技术科学]