Your browser doesn't support javascript.
loading
Designing low-carbon fly ash based geopolymer with red mud and blast furnace slag wastes: Performance, microstructure and mechanism.
Li, Zhiping; Zhang, Junyi; Lei, Zuxiang; Gao, Mengshi; Sun, Junbo; Tong, Lihong; Chen, Shunman; Wang, Yufei.
Afiliación
  • Li Z; School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China; State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China.
  • Zhang J; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. Electronic address: j2zhang@polyu.edu.hk.
  • Lei Z; School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China; State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China. Electronic address: zxlei@ecjtu.edu.cn.
  • Gao M; School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China.
  • Sun J; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang 213300, China.
  • Tong L; School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China; State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang 330013, China.
  • Chen S; School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China.
  • Wang Y; School of Design and the Built Environment, Curtin University, Perth, WA 6102, Australia.
J Environ Manage ; 354: 120362, 2024 Mar.
Article en En | MEDLINE | ID: mdl-38364543
ABSTRACT
In order to tackle the environmental problems induced by Portland cement production and industrial solid wastes landfilling, this study aims to develop novel ternary cementless fly ash-based geopolymer by recycling red mud and blast furnace slag industrial solid wastes. The fresh-state properties, mechanical strength, water permeability, phase assemblage and microstructure were systematically investigated to evaluate the performance variation and reveal the hydration mechanism for geopolymers with different mixing proportions. The results showed that a higher slag content or a lower red mud content could result in the higher fluidity and shorter setting time for fresh mixture. The existence of slag promoted the transformation of N-A-S-H to C-A-S-H gel, which contributed to higher compressive strength and better resistance to water penetration. However, an excessive incorporation of 30% red mud may impede the generation of N-A-S-H gel and form more flocculent-like loose hydrates, thus to mildly degrade the mechanical strength and anti-permeability. The synergetic utilization of red much and blast furnace slag in fly ash-based geopolymer led to much less CO2 emission compared with the condition that red much or slag was singly added, which demonstrated prominent environmental advantages for such kind of ternary cementless geopolymer with equivalent mechanical strength.
Asunto(s)
Palabras clave

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Residuos Sólidos / Ceniza del Carbón Idioma: En Revista: J Environ Manage Año: 2024 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Residuos Sólidos / Ceniza del Carbón Idioma: En Revista: J Environ Manage Año: 2024 Tipo del documento: Article País de afiliación: China