高强度低导热泡沫混凝土性能研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (4): 1186-1192.

高强度低导热泡沫混凝土性能研究

周学军¹, 咸国栋¹, 王振¹, 刘哲¹, 王兴博¹, 王卫东²

1.山东建筑大学土木工程学院,济南 250101;
2.山东联兴绿厦建筑科技有限公司,德州 253500

收稿日期:2020-10-20 修回日期:2021-01-14 出版日期:2021-04-15 发布日期:2021-05-11
作者简介:周学军(1965—),男,博士,教授。主要从事钢结构理论、空间钢结构和建筑保温等方面的研究。E-mail:xuejunzhou@sdjzu.edu.cn
基金资助:
国家重点研发计划(SQ2020YFF0426523)

Performance of High Strength and Low Thermal Conductivity Foamed Concrete

ZHOU Xuejun¹, XIAN Guodong¹, WANG Zhen¹, LIU Zhe¹, WANG Xingbo¹, WANG Weidong²

1. College of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China;
2. Shandong Lianxing Lvsha Construction Technology Co., Ltd., Dezhou 253500, China

Received:2020-10-20 Revised:2021-01-14 Online:2021-04-15 Published:2021-05-11

摘要/Abstract

摘要： 在工程实践中,作为装配式建筑的墙体材料,既要有较好的保温隔热性能,又要满足一定的力学性能。轻质泡沫混凝土是一种很好的选择,但普通的泡沫混凝土材料在满足热工性能时其力学性能往往表现较差。本文提出一种高强度低导热泡沫混凝土制备方法,研究了水胶比、泡沫掺量、粉煤灰掺量和聚丙烯(PP)纤维掺量对泡沫混凝土的抗压强度和导热系数的影响,并采用扫描电镜(SEM)探究了粉煤灰和PP纤维对泡沫混凝土微观形貌的影响。结果表明:当水胶比为0.6、泡沫掺量为4%(质量分数,下同)、粉煤灰掺量为25%以及PP纤维掺量为0.2%时,泡沫混凝土的抗压强度较高且导热系数较低。

关键词: 泡沫混凝土, 粉煤灰, 聚丙烯纤维, 抗压强度, 导热系数

Abstract: In engineering practice, as the wall material of prefabricated buildings, this wall material not only requires better thermal insulation performance, but also meets certain mechanical properties requirements. Light foamed concrete is a good choice for this wall material. But the mechanical properties of light foamed concrete are often poor when it meets the thermal properties requirements. A preparation method of high strength and low thermal conductivity foamed concrete was proposed. The effects of water-binder ratio, foam content, fly ash content and polypropylene (PP) fiber content on the compressive strength and thermal conductivity of foamed concrete were studied through mix ratio experiment. In view of scanning electron microscope (SEM) of foamed concrete, the influences of fly ash and PP fiber on compressive strength and thermal conductivity of foamed concrete are revealed. The results show that when the water-binder ratio is 0.6, the content of foam is 4% (mass fraction, the same below), the content of fly ash is 25% and the content of PP fiber is 0.2%, the foamed concrete has higher compressive strength and lower thermal conductivity.

Key words: foamed concrete, fly ash, polypropylene fiber, compressive strength, thermal conductivity

中图分类号:

TU528.2

周学军, 咸国栋, 王振, 刘哲, 王兴博, 王卫东. 高强度低导热泡沫混凝土性能研究[J]. 硅酸盐通报, 2021, 40(4): 1186-1192.

ZHOU Xuejun, XIAN Guodong, WANG Zhen, LIU Zhe, WANG Xingbo, WANG Weidong. Performance of High Strength and Low Thermal Conductivity Foamed Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1186-1192.

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