Assessment of compressive strength, durability, and erodibility of quarry dust-based geopolymer cement stabilized expansive soil

Excessive swelling and high compressibility of soil have posed countless challenges such as poor dynamic shear strength for engineers dealing with cyclic loading in pavement structure. To address this challenge, the durability and mechanical properties of the investigated subgrade were treated with 10%, 20%, and 30% of activated nano-disilicate fly ash (NDFA) to the dry mass of the subgrade soil. A series of swelling pressure tests, One-dimensional compression tests, and dynamic triaxial (DT) tests were conducted on the samples fabricated using altered moisture content. The findings demonstrated that the swelling pressure and compressibility of the NDFA-treated specimens significantly decreased to an average of 15.3% and 18.4% respectively upon 20% inclusion of NDFA beyond which the swelling stress and compressibility values further decreased signifying the impact of NDFA on the expansive subgrade. The consolidation results also revealed that the treated soil’s consolidation parameters greatly decreased compared to the untreated soil with a high void ratio and compression index ($${C}_{c}$$ C c ). The dynamic shear resistance of the subgrade soil increased by 36% upon the addition of 10% NDFA content compared to the untreated soil which portrayed a very low resistance against dynamic shear modulus ($${G}_{max}$$ G max ) with a corresponding high damping ratio. The investigation revealed a strong correlation between $${C}_{c}$$ C c and dynamic shear modulus which is closely correlated to a coefficient determination of 0.99 due to the parameter’s dependency on porosity, particle shape, and stiffness.

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Applications of preloading pressure on expansive subgrade treated with nano-geopolymer binder for cyclic crack resistance

Ikechukwu

Onyelowe

2022

Nanotechnol. Environ. Eng.

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Assessment of compressive strength, durability, and erodibility of quarry dust-based geopolymer cement stabilized expansive soil

Cited by 6 publications

References 33 publications

Study on the physical properties of red clay cured by different external admixtures combined with enzyme induced carbonate precipitation technology

Study on the physical properties of red clay cured by different external admixtures combined with enzyme induced carbonate precipitation technology

Enhancing Dynamic Shear Resistance and Efficient Micro-Void Reduction of Expansive Soil Using Activated Nano-Desilicated Fly Ash

Applications of preloading pressure on expansive subgrade treated with nano-geopolymer binder for cyclic crack resistance

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