硅灰对超轻水泥基复合保温材料性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (12): 4030-4036.

硅灰对超轻水泥基复合保温材料性能的影响

吴子豪¹, 王武祥^1,2, 刘晓通³, 王爱军¹, 张磊蕾^1,2, 杨俊¹

1.中国建筑材料科学研究总院有限公司,北京 100024;
2.绿色建筑材料国家重点实验室,北京 100024;
3.中国建材检验认证集团海南有限公司,海口 570100

出版日期:2021-12-15 发布日期:2022-01-07
通讯作者: 王武祥,教授级高工。E-mail:wangwuxiang@126.com
作者简介:吴子豪(1996—),男,硕士研究生。主要从事墙体保温材料方面的研究。E-mail:wuzihao319@163.com
基金资助:
国家重点研发计划(2018YFD1101002)

Effect of Silica Fume on Properties of Ultra-Light Cement-Based Composite Thermal Insulation Materials

WU Zihao¹, WANG Wuxiang^1,2, LIU Xiaotong³, WANG Aijun¹, ZHANG Leilei^1,2, YANG Jun¹

1. China Building Materials Academy Co. , Ltd. , Beijing 100024, China;
2. State Key Laboratory of Green Building Materials, Beijing 100024, China;3. China Building Material Test & Certification Group Hainan Co. , Ltd. , Haikou 570100, China

Online:2021-12-15 Published:2022-01-07

摘要/Abstract

摘要： 超轻水泥基复合保温材料(UCIM)是以水泥为胶凝材料,膨胀聚苯乙烯泡沫塑料(EPS)颗粒、掺合料、泡沫剂、改性剂和水等为主要原料,采用物理发泡工艺制备而成。UCIM由EPS颗粒与泡沫混凝土基体互穿构成,不同品种的掺合料等效替代水泥后,能不同程度影响水泥浆体对EPS颗粒的包裹性,从而影响UCIM结构的均匀性与制品性能。通过设计不同掺量的掺合料,对比硅灰、偏高岭土及矿粉所制备的UCIM的均匀性及强度,结果表明,当采用硅灰时,UCIM未产生分层离析现象且制品强度试验结果较好;通过微孔拍摄及强度、热工性能测试,系统研究了硅灰掺量对UCIM的泡沫混凝土基体的孔结构、强度和导热系数的影响,结果表明,适宜掺量的硅灰能提高UCIM的力学性能,使UCIM的泡沫混凝土基体的平均孔径减小,进而有利于降低UCIM导热系数。

关键词: 超轻水泥基复合保温材料, 硅灰, 均匀性, 孔结构, 强度, 导热系数

Abstract: In this paper, using the cement as the cementing material, expanded polystyrene foam (EPS) particles, admixture, foams and modifiers, water and others as the main raw materials, using physical foaming process to prepare the ultra-light cement-based composite thermal insulation materials (UCIM). UCIM was composed of EPS particles and foamed concrete matrix through interpenetrating, after different kinds of admixtures were equivalent to replace cement, the inclusion of cement paste on EPS particles was affected to different degrees, so that the uniformity of UCIM structure and product properties were affected. Through the design of different amounts of admixtures, the uniformity and strength of UCIM prepared by silica fume, metakaolin and mineral powder were compared. The results show that there is no delamination and segregation phenomenon, and the strength test results of UCIM are good when silica fume is used. And by photographing micropore, testing strength and thermal performance, the effect of the silica fume content on the pore structure, strength and thermal conductivity of foamed concrete matrix in UCIM was studied systematically. The results show that the appropriate amount of silica fume improves the mechanical properties of UCIM, and reduces the average pore size of foamed concrete matrix in UCIM, which is beneficial to reduce the thermal conductivity of UCIM.

Key words: ultra-light cement-based composite thermal insulation material, silica fume, uniformity, pore structure, strength, thermal conductivity

中图分类号:

TU528.2

吴子豪, 王武祥, 刘晓通, 王爱军, 张磊蕾, 杨俊. 硅灰对超轻水泥基复合保温材料性能的影响[J]. 硅酸盐通报, 2021, 40(12): 4030-4036.

WU Zihao, WANG Wuxiang, LIU Xiaotong, WANG Aijun, ZHANG Leilei, YANG Jun. Effect of Silica Fume on Properties of Ultra-Light Cement-Based Composite Thermal Insulation Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(12): 4030-4036.

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