The Mechanical Properties of Laterite Substituted with Cement and Bottom Ash

Abstract:

Bottom ash (BTA), a by-product of coal combustion in electric power plants, is commonly regarded as waste, presenting challenges in its management. Conversely, laterite, typically used in road construction, has become increasingly expensive due to its high quality. This study aims to investigate the mechanical properties of laterite replaced with BTA and cement. The replacement of BTA ranged from 10% to 50% of the dry weight of laterite, with cement contents of 1% and 3% of the dry weight of the laterite-BTA mixture. Experimental tests, including unconfined compressive strength (USC) and splitting tensile strength (STS), were conducted. The results indicate that replacing laterite with BTA and cement enhances strength by 2 to 8 times that of unstabilized laterite, with 20% BTA replacement yielding the highest strengths. This approach not only provides cost-effective road construction materials but also contributes to sustainable practices by conserving natural resources and reducing pollution.

• Periodical: Key Engineering Materials (Volume 1000)
• Pages: 43-48
• DOI: https://doi.org/10.4028/p-VLV5x3
• Online since: December 2024
• Authors: Sakda Lhajai*, Marupatch Jamnongwong, Nuttawut Thanasisathit
• Keywords: Bottom Ash, Splitting Tensile Strength, Stabilization, Unconfined Compressive Strength, Waste Materials

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