LEI Yiming¹,LI Jinkai¹,QIAO Lin²,ZHAO Piqi¹,LIU Zongming¹

(1.College of Materials Science and Engineering,University of Jinan,Jinan 250022,China; 2.Shandong Chuangwei External Wall Thermal Insulation Material Co.,Ltd.,Jinan 250013,China)

Abstract：A large amount of particle waste is produced during the production of extruded polystyrene board (XPS).In order to avoid environmental problems,XPS particle waste is used to prepare lightweight aggregate concrete.The influence of the content of polystyrene particles,XPS waste particles and redispersible latex powder on the performance of lightweight aggregate concrete was studied by the external mixing method.The results show that when the volume of polystyrene particles is less than 1 200 mL,it has a linear relationship with the compressive strength,flexural strength and density of concrete.When the volume of polystyrene particles is 1 500 mL,it tends to be saturated in concrete.Redispersible emulsion powder can improve the interface between polystyrene particles and concrete.When the content is 6 g,the compressive strength increases 28% and the flexural strength increases 48%.When XPS particles are used to replace polystyrene particles in equal volume,the larger porosity of XPS particles leads to the increase of thermal conductivity.After removing the gap between particles in the calculation,XPS particles replace polystyrene particles in equal volume,and the thermal conductivity decreases to 0.0 896 W/(m·K) when replacing 2/3 of polystyrene particles.

Keywords：light aggregate concrete;plastic extruded board;polystyrene particle;thermal conductivity

Get Citation:LEI Y M,LI J K,QIAO L,et al.Preparation of light aggregate concrete with extruded plate particles[J].China Powder Science and Technology,2023,29(3)：72-80.

Received： 2022-09-29,Revised：2022-11-10,Online：2023-04-17 10：04。

Funding Project：国家自然科学基金项目,编号：52172021。

First Author：雷一鸣(1997—),男,硕士研究生,研究方向为混凝土。E-mail：2768068263@qq.com。

Corresponding Author：李金凯(1985—),男,副教授,博士,硕士生导师,研究方向为无机非金属材料。E-mail：mse_lijk@ujn.edu.cn。