Effects Of Shrink-Swell Control, Strength Improvement, And Crack Resistance On Engineering Properties Of Expansive Clay

Naheed Akhtar, Qamar Zaman, Noor Muhammad, Murad Khan, Muhammad yasir, Muhammad Munawar, Hammad Rang Shah, Syed Hassaan Mustafa

Authors

Naheed Akhtar, Qamar Zaman, Noor Muhammad, Murad Khan, Muhammad yasir, Muhammad Munawar, Hammad Rang Shah, Syed Hassaan Mustafa

Keywords:

Expansive clay, soil stabilization, shrink-swell behavior, unconfined compressive strength, crack resistance.

Abstract

Expansive clay soils pose major geotechnical challenges due to their high shrink–swell behavior, low strength characteristics, and susceptibility to cracking under environmental changes. These properties lead to severe infrastructure damage, including pavement distress, foundation failure, embankment instability, and structural cracking. This review critically evaluates recent advancements in stabilization techniques aimed at improving shrink–swell control, enhancing strength properties, and increasing crack resistance of expansive clays. Various stabilization materials, including cement, lime, fly ash, silica fume, nano-materials, industrial byproducts, agricultural waste ashes, fibers, and geosynthetics, were systematically examined based on their engineering performance. The findings indicate that hybrid stabilization systems combining pozzolanic materials and fibers provide superior multifunctional performance by simultaneously reducing free swell index, increasing unconfined compressive strength, improving shear strength parameters, and minimizing crack propagation. Nanomaterials and industrial slag systems demonstrated exceptional effectiveness in strength enhancement, while fiber reinforcement significantly improved ductility and fracture resistance. Sustainable stabilization approaches utilizing agricultural and industrial waste materials also showed promising environmental and economic benefits through waste valorization and reduced carbon emissions. Overall, the review highlights that integrated stabilization strategies offer durable, cost-effective, and sustainable solutions for enhancing the engineering performance of expansive clay soils in modern infrastructure applications.

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