Investigating the impact of Silica Fume on the Engineering Properties of Concrete with Bama Gravel as the Coarse Aggregate

Shittu Nurudeen Jayeola, Yusuf Hadiza

Abstract


Globally, concrete is the most widely used construction material. The composition of concrete plays an important role in controlling its overall performance. Concrete is composed of approximately 70%–80% aggregates, by volume. Therefore, it is mandatory to investigate the effect of aggregates on the performance of concrete. For this purpose, this experimental study investigates the impact of silica fume on the engineering properties of concrete incorporating Bama gravel as coarse aggregate. The research focuses on compressive strength, durability, and optimal silica fume dosage. Concrete mixes with varying silica fume proportions (0%, 5%, 10%, 15%, and 20%) were tested for compressive strength at 7, 14, and 28 days, and durability characteristics were assessed through slump and permeability tests. The results indicate significant improvements in compressive strength and durability with optimal silica fume addition (15%). Compressive strength increased by 7% at 28 days, while permeability reduced by 23%. However, excessive silica fume additions compromised these benefits. The study identifies 15% silica fume as the optimal dosage for balancing strength, durability, and workability. The findings contribute to the development of high-performance concrete mixes incorporating silica fume and Bama gravel, promoting sustainable construction practices.


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References


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