Welcome to Visit BULLETIN OF THE CHINESE CERAMIC SOCIETY! Today is

BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2023, Vol. 42 ›› Issue (11): 4072-4081.

Special Issue: 资源综合利用

Previous Articles     Next Articles

Mechanical Property of Bottom Ash-Tuff Based Geopolymer

WU Jianxun1, JIANG Jian1, YANG Yonghao2, KONG Yu1, ZHAN Xinyuan3, LUO Zhihao2, CHEN Liang1   

  1. 1. East China Electric Power Design Institute Co., Ltd. of CPECC, Shanghai 200063, China;
    2. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
    3. School of Resources and Environmental Engineering, Hefei University of Technology,Hefei 230009, China
  • Received:2023-07-13 Revised:2023-08-19 Online:2023-11-15 Published:2023-11-22

Abstract: In order to explore the resource utilization prospects of municipal solid waste incineration bottom ash, the feasibility of preparing geopolymer from waste incineration bottom ash and tuff was investigated. The effects of bottom ash content, silicon-sodium molar ratio and alkali equivalent content on the properties of bottom ash-tuff based geopolymer were studied through uniaxial compressive strength test, XRD, FTIR and SEM. Test results show that the curing time has a great influence on the physical and mechanical properties of bottom ash-stuff based geopolymer. The optimal process parameters of bottom ash-stuff based geopolymer are bottom ash content of 20%, the silicon-sodium molar ratio of 1.7 and the alkali equivalent content of 8%. Bottom ash-stuff based geopolymer has a uniaxial compressive strength of 23.2 MPa and bulk density of 1.56 g/cm3 for curing 28 d. The main phases of bottom ash-stuff based geopolymer are quartz, sanidine, yeelimite and calcite. A large number of aluminosilicate gels are generated during the geopolymerization process, resulting in the microscopic structure of bottom ash-stuff based geopolymer shows a binding structure of small and larger particles. Toxicity characteristic leaching procedure of heavy metals in bottom ash-stuff based geopolymer meets the requirements of safety and environmental protection.

Key words: bottom ash, tuff, geopolymer, uniaxial compressive strength, bulk density, microscopic analysis

CLC Number: