Articles
  • Composition design and crack resistance optimization method of red mud based foamed lightweight soil

  • Ning Zhangb,c, Xingzhang Guoa,c, Yuyan Lia,c, Jian Zhanga,c,* and Tingting Yua,c

  • aGeotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shandong, 250061, PR China
    bShandong Hi-speed Group, Co., Ltd, Jinan, Shandong, 250098, PR China
    cSolid Waste Recycling Technology Innovation Center of Shandong Province, Jinan, Shandong, 250098, PR China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Utilizing industrial solid waste as a cementitious material for the production of foamed lightweight soil demonstrates significant potential applications in the field of road engineering. In this paper, red mud based foamed lightweight soil was developed. And the crack resistance of red mud based foamed lightweight soil was evaluated. The findings indicate that the optimum composition for the red mud based cementitious material comprises 60 wt% red mud, 40 wt% slag, and 6 wt% NaOH. The compressive strength could reach 6.02 MPa and the initial setting time was 104 min at 28 d of curing. A composite foaming agent was formulated by selecting a combination of compound alkylamidopropyl betaine and xanthan gum. With a foam agent addition of 5 wt%, the compressive strength of red mud based foamed lightweight soil reached 1.05 MPa at 28 d of curing, the fluidity reached 212 mm. Fiber can effectively inhibit the cracking of red mud based foamed lightweight soil, and 1.5 wt% glass fiber was determined to be the optimal dosage. The results can provide a certain basis for the application of red mud based foamed lightweight soil.


Keywords: Red mud, Foamed lightweight soil, Foaming property, Crack resistance.

This Article

  • 2024; 25(3): 355-364

    Published on Jun 30, 2024

  • 10.36410/jcpr.2024.25.3.355
  • Received on Feb 21, 2024
  • Revised on Mar 17, 2024
  • Accepted on Mar 19, 2024

Correspondence to

  • Jian Zhang

  • aGeotechnical and Structural Engineering Research Center, Shandong University, Jinan, Shandong, 250061, PR China
    cSolid Waste Recycling Technology Innovation Center of Shandong Province, Jinan, Shandong, 250098, PR China
    Tel : 15069192830 E-mail: zhjian1@126.com

  • E-mail: zhjian1@126.com