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Chemical-composition-based design of self-leveling geopolymer stabilized soil: Performance optimization and
Jianhua Li1,2, Haipeng Wu3, Zihang Shen3
1Huzhou Vocational and Technical College, Huzhou 313000, China.
Iscience
|April 10, 2026
Summary
This research introduces self-leveling geopolymer stabilized soil (SLGS) made from fly ash and slag, offering a sustainable alternative to cement. The new material shows superior water stability and strength compared to traditional cement-stabilized soil.
Area of Science:
- Geotechnical Engineering
- Materials Science
- Environmental Science
Background:
- Traditional soil stabilization often relies on cement, contributing to significant CO2 emissions.
- Construction and industrial waste, such as fly ash and slag, present disposal challenges and environmental concerns.
- Developing sustainable alternatives for soil stabilization is crucial for reducing environmental impact and promoting waste recycling.
Purpose of the Study:
- To develop a self-leveling geopolymer stabilized soil (SLGS) using fly ash and slag as binders.
- To establish a precise mix proportioning system for SLGS.
- To evaluate the performance of SLGS and compare it with cement-stabilized soil.
Main Methods:
- Fly ash and slag chemistries were utilized for geopolymer binder development.
- X-ray fluorescence (XRF) analysis, molar ratio control, and modeling were employed for mix proportioning.
- Sodium silicate modulus was investigated to optimize the geopolymer formulation, with an optimal range of 2.0 to 1.2 identified.
Main Results:
- The developed SLGS, with 15% binder content, achieved 84.67% water stability after 7 days.
- The SLGS exhibited a 28-day unconfined compressive strength (UCS) of 3.03 MPa.
- The material demonstrated excellent flowability of 170 mm, surpassing cement-stabilized soil in key performance indicators.
Conclusions:
- The developed SLGS offers a viable and environmentally friendly alternative to cement-based soil stabilization.
- This geopolymer-based approach effectively utilizes industrial waste, promoting circular economy principles.
- The study provides a reliable technical framework for sustainable construction practices and waste management.
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