Skip to main content

ORIGINAL RESEARCH article

Front. Mater.
Sec. Structural Materials
Volume 11 - 2024 | doi: 10.3389/fmats.2024.1499691
This article is part of the Research Topic Structural Applications of Concrete with Recycled Solid Wastes and Alternatives for Cement View all 8 articles

Investigation of the performance and life cycle carbon emission assessment of alkali-activated sintered sludge-slag-based permeable concrete

Provisionally accepted
Ning Xiangbo Ning Xiangbo 1Zhang Jiayang Zhang Jiayang 2*Zhuang Can Zhuang Can 3*Su Qunyong Su Qunyong 4*Zhong Sunjie Zhong Sunjie 3*
  • 1 CHINA MCC22 GROUP CORPORATION LTD, Hebei, China
  • 2 School of Civil Engineering, Tianjin University, Tianjin, China
  • 3 FUJIAN ZHANGLONG CONSTRUCTION INVESTMENT GROUP CO, Zhangzhou, China
  • 4 ZHANGZHOU MUNICIPAL ENGINEERING CENTER., Zhangzhou, China

The final, formatted version of the article will be published soon.

    As urbanization continues to accelerate, the application of permeable concrete is becoming an increasingly prevalent practice. Nevertheless, the carbon dioxide emission issue associated with traditional permeable concrete cannot be overlooked. In this study, alkali-activated sintered sludge and slag were employed as raw materials to prepare alkali-activated sintered sludge-slag-based permeable concrete. The effects of sludge calcination temperature, sludge content, and binder-to-aggregate ratio on the compressive strength, porosity, and permeability coefficient of the permeable concrete were investigated through the implementation of one-way experiments. The formation mechanism of permeable concrete materials was analyzed using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), and a carbon emission assessment was performed. The findings indicated that an increase in sludge content resulted in a notable decline in the 28-day compressive strength, accompanied by a reduction in the Ca / Si ratio of the C-A-S-H hydration products, from 1.08 to 0.35. Conversely, the carbon emission assessment demonstrated that abiotic losses declined markedly with an increase in sludge content, effectively mitigating the carbon emission burden associated with construction materials.

    Keywords: Alkali-activated permeable concrete, sludge, slag, formation mechanism, carbon emissions

    Received: 21 Sep 2024; Accepted: 28 Oct 2024.

    Copyright: © 2024 Xiangbo, Jiayang, Can, Qunyong and Sunjie. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Zhang Jiayang, School of Civil Engineering, Tianjin University, Tianjin, 300350, China
    Zhuang Can, FUJIAN ZHANGLONG CONSTRUCTION INVESTMENT GROUP CO, Zhangzhou, China
    Su Qunyong, ZHANGZHOU MUNICIPAL ENGINEERING CENTER., Zhangzhou, China
    Zhong Sunjie, FUJIAN ZHANGLONG CONSTRUCTION INVESTMENT GROUP CO, Zhangzhou, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.