Mechanical properties and microstructure of High-Performance Concrete with bamboo leaf ash as additive

Odeyemi, S. O. and Atoyebi, O. D. and Kegbeyale, O. S. and Anifowose, M. A. and Odeyemi, O. T. and Adeniyi, A.G and Orisadare, O. A. (2021) Mechanical properties and microstructure of High-Performance Concrete with bamboo leaf ash as additive. Cleaner Engineering and Technology, 6.

Text 45. Mechanical properties and microstructure of High-Performance Concrete with bamboo leaf ash as additive.pdf - Published Version Download (5MB)

Abstract

The demand for High-Performance Concrete (HPC) is on the increase for its good workability, high strength, and better durability. HPC are obtained by incorporating supplementary Cementitious Materials (SCM) into concrete to attain a long-term strength and durability performance. Though, several SCM have been investigated in HPC, the use of Bamboo Leave Ash (BLA) in HPC as an SCM has not been considered. Thus, this research investigated the use of BLA as SCM in HPC. The bamboo leaves were calcined in an electric furnace at a temperature of 700 ◦C. The ash was characterized using Energy Dispersive X-ray Fluorescence (EDXRF) and were found to possess pozzolanic properties with silica content above 70%. Cement was replaced by BLA at 5%, 10%, 15%, and 20% by weight of cement. Concrete made from these combinations were tested for compressive and splitting tensile strengths at 7, 28 and 56 days of curing. It was observed that optimum strength was attained at 5% replacement at 56 days of curing. The microstructures of the concrete revealed that at 5% incorporation of BLA in concrete, there was a better interlocking of concrete grain. It was concluded that cement can be replaced with 5% BLA in High Performance Concrete.

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