Exploration on using solid waste-derived sulphoaluminate composite as low-cost binder for high-impermeability stabilization of sandy soil
Zhang S. Li J. Shi W. Lin F. Bigalievich B.A. Mamurovich E.A. Wang W.
September 2025Springer Nature
Waste Disposal and Sustainable Energy
2025#7Issue 3481 - 493 pp.
Large-scale utilization of solid waste is the key challenge in building sustainable infrastructure. Given the high demand for sandy soil stabilizers in subgrades, dams and other infrastructure projects and the high permeability of sandy soil, a sulphoaluminate composite cementitious material (SCCM) was developed by incorporating solid waste-derived sulphoaluminate cementitious material (SAC), desulfurized gypsum, ground granulated blast furnace slag (GGBS), and supplementary industrial byproducts, which can be used as high-permeability stabilizers for sandy soil. The economic and environmental assessment revealed that the carbon emission factor of the SCCM throughout their whole life cycle was 135.8 kg/t. The results revealed that the unconfined compressive strength (UCS) of stabilized sandy soil for 28 d was the highest among all the stabilized sandy soils, and the 28 d immersion stability rate was 72.5%. The 28 d permeability coefficient of sandy soil stabilized by SCCM decreased from 8.7×10−4 cm/s for natural sandy soil to 5.7×10−7 cm/s, which was 1–2 orders of magnitude lower than that of SAC and ordinary Portland cement (OPC) stabilized sandy soil. Both scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed the co-existence of ettringite and hydrated calcium silicate gel, and their addition improved the properties of the stabilized sandy soil. The results of the low-field nuclear magnetic resonance (LF-NMR) test revealed that the porosity of the SCCM stabilized sandy soil was lower than that of the SAC stabilized sandy soil and OPC, resulting in a dense structure. This study provides an innovative solution for the utilization of bulk solid waste in stabilizing sandy soil in infrastructure projects.
Ettringite , Low-field nuclear magnetic resonance (LF-NMR) , Microscopic morphology , Solid waste utilization , Unconfined compressive strength (UCS)
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Shandong Engineering Laboratory for Solid Waste Green Materials, Engineering Research Centre of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Green Thermal Power and Carbon Reduction, School of Nuclear Science, Energy and Power Engineering, National Engineering Laboratory for Reducing Emissions From Coal Combustion, Shandong University, Jinan, 250014, China
Tianjin Key Lab of Biomass/Wastes Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China
Institute of Ecological and Biological Resource Sustainability, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Yangiyer Branch of Tashkent Institute of Chemical Technology, Yangiyer, 121000, Uzbekistan
Shandong Engineering Laboratory for Solid Waste Green Materials
Tianjin Key Lab of Biomass/Wastes Utilization
Institute of Ecological and Biological Resource Sustainability
Yangiyer Branch of Tashkent Institute of Chemical Technology
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