含渣土的EPS轻质混凝土用于复合夹芯墙板芯材的研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (6): 2053-2062.

所属专题：资源综合利用

含渣土的EPS轻质混凝土用于复合夹芯墙板芯材的研究

肖家冬¹, 万惠文¹, 张高科¹, 沈聪¹, 李源², 彭玻尔³

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.武汉理工大学矿物资源加工与环境湖北省重点实验室,武汉 430070;
3.深圳地铁集团有限公司,深圳 518000

收稿日期:2022-01-19 修订日期:2022-04-11 出版日期:2022-06-15 发布日期:2022-07-01
通信作者: 万惠文,博士,教授。E-mail:wanhw@whut.edu.cn
作者简介:肖家冬(1997—),男,硕士研究生。主要从事生态建筑材料的研究。E-mail:xiao_jiadong@163.com
基金资助:
国家自然科学基金面上项目(22176151)

EPS Lightweight Concrete Mixed with Muck as Core Material of Composite Sandwich Wall Panels

XIAO Jiadong¹, WAN Huiwen¹, ZHANG Gaoke¹, SHEN Cong¹, LI Yuan², PENG Bo'er³

1. State Key Laboratory of Silicate for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. Hubei Provincial Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan 430070, China;
3. Shenzhen Metro Group Co., Ltd., Shenzhen 518000, China

Received:2022-01-19 Revised:2022-04-11 Online:2022-06-15 Published:2022-07-01

摘要/Abstract

摘要： 为提高地铁渣土资源化利用率,将其掺入膨胀聚苯乙烯(EPS)轻质混凝土中,并用此混凝土为芯材制备复合夹芯墙板,研究了浆体的流变性,并探讨了硬化EPS混凝土的抗压强度、导热系数及EPS颗粒在浆体中的面分布。结果表明:随着渣土掺量增加,浆体屈服应力增加,流动度降低;浆体塑性黏度随渣土掺量增加大幅度增加,使得EPS颗粒分布更加均匀;EPS混凝土的干密度、抗压强度与导热系数随渣土掺量增加而逐渐降低。当干渣土与水泥质量比为0.8时,EPS混凝土的干密度为857 kg/m³,抗压强度为4.16 MPa,导热系数为0.231 W·m^-1·K^-1;采用干渣土与水泥质量比为0.8的EPS混凝土制备复合夹芯墙板(硅钙板作面板),墙板粘结性能良好,面密度为81 kg/m²,抗压强度为3.75 MPa,软化系数为0.83,耐火极限大于1 h,其性能满足轻质隔墙条板国家标准要求。

关键词: 渣土, EPS轻质混凝土, 复合夹芯墙板, 流变性, EPS面分布

Abstract: To achieve more comprehensive utilization, subway muck was incorporated into expanded polystyrene (EPS) lightweight concrete, and composite sandwich wall panels were prepared with this concrete as the core material. The rheological properties of slurry were studied. Besides, the compressive strength, thermal conductivity and EPS beads areal distribution of EPS concrete were investigated. The results show that the addition of muck slightly increases the yield stress of slurry, but exhibits limited effect on the fluidity. With the increase of muck dosage, the plastic viscosity of slurry increases greatly, contributing to more uniform distribution of EPS. The dry density, compressive strength and thermal conductivity of EPS concrete decrease with the increase of muck dosage. EPS concrete with dry muck to cement mass ratio of 0.8 demonstrates the dry density of 857 kg/m³, the compressive strength of 4.16 MPa and the thermal conductivity of 0.231 W·m^-1·K^-1. The composite sandwich wall panel (silicon calcium board as panel) with dry muck to cement mass ratio of 0.8 reveals good bonding performance, and the areal density is 81 kg/m², the compressive strength is 3.75 MPa, the softening coefficient is 0.83 and the fire resistance is greater than 1 h. All indexes meet the performance requirements for the composite sandwich wall panels in Chinese standard.

Key words: muck, EPS lightweight concrete, composite sandwich wall panel, rheological property, EPS areal distribution

中图分类号:

TU528

肖家冬, 万惠文, 张高科, 沈聪, 李源, 彭玻尔. 含渣土的EPS轻质混凝土用于复合夹芯墙板芯材的研究[J]. 硅酸盐通报, 2022, 41(6): 2053-2062.

XIAO Jiadong, WAN Huiwen, ZHANG Gaoke, SHEN Cong, LI Yuan, PENG Bo'er. EPS Lightweight Concrete Mixed with Muck as Core Material of Composite Sandwich Wall Panels[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 2053-2062.

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含渣土的EPS轻质混凝土用于复合夹芯墙板芯材的研究

EPS Lightweight Concrete Mixed with Muck as Core Material of Composite Sandwich Wall Panels

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