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A review on sustainable stabilizing for subgrade soil by GGBS and CKD

AIP Conference Proceedings, ISSN: 1551-7616, Vol: 3249, Issue: 1
2024
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Conference Paper Description

Subgrade soil is crucial to the road pavement structure as it supports the underlying pavement layers, including the subbase, base, and wearing courses. Evaluating subgrade soil features is paramount when formulating a pavement structure design. The subgrade soil's deficiencies significantly impact all the pavement layers above, particularly in the case of flexible pavement. The stability of the subgrade must be sufficient to withstand unfavorable weather conditions and provide adequate support for the pavement. Inadequate subgrade conditions give rise to undulations, corrugations, rut formation, and shoving within asphalt pavements. Stabilization encompasses various techniques to enhance soil's engineering characteristics, optimizing its suitability for diverse civil engineering applications. The current review aims to investigate the impact of industrial waste materials, specifically Ground Granulated Blast Furnace Slag (GGBS) and Cement Kiln Dust (CKD), on the characteristics of subgrade soil. The selected articles show that using either GGBS, CKD separately, or CKD and GGBS have increased the soil strength and improved the soil characteristics.

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