PERFORMANCE ANALYSIS OF CASSAVA PEEL ASH IN MITIGATING THE OCCURRENCE OF ALKALI- SILICA REACTION IN CONCRETE

AJAYI,, JOSEPH ADENIYI (2022) PERFORMANCE ANALYSIS OF CASSAVA PEEL ASH IN MITIGATING THE OCCURRENCE OF ALKALI- SILICA REACTION IN CONCRETE. Masters thesis, Landmark University, Omu Aran, Kwara State.

Text AJAYI, JOSEPH ADENIYI.docx Download (5MB)

Abstract

Concrete is a composite material created by humans that has mechanical properties similar to naturally occurring limestone pebbles. Researchers have become interested in the sustainability of concrete as a result of the increasing harm being done to the environment. As a result, they are looking for partial substitutes for Portland cement in concrete to lessen the alkali-silica reaction. In this investigation, the potential use of cassava peel ash (CPA) to stop ASR in concrete structures is explored. Cassava peels were gathered as waste, sun-dried, and then heated to 850°C in an electric furnace for 90 minutes. Using a mix ratio of 1:1:2 and replacement rates for CPA in the cement of 0, 5, 10, 15, 20, and 30% by weight, concrete samples having water-cement ratios of 0.65 and 0.7 were created. For the test, four distinct set sizes of samples—100 x 150 mm cylindrical sample, 150 x 150 x 150 mm cubic sample, 30 x 30 x 150 mm, and 100 x 100 x 1000 mm—were made and cured in water. X-ray fluorescence (XRF) spectroscopy was used to analyze the elemental makeup of CPA. Workability, compressive strength, split tensile, thermal conductivity, water and acid solubility, and electrical resistivity tests were carried out on accelerated mortar bars at 7, 14, 21, and 28 days. The results demonstrated that using cassava peel ash as a cement substitute in concrete at acceptable concentrations reduced the development of ASR (5, 10, and 15 percent). Because CPA had the greatest effect on alkali-silica reactivity, it can be used to manage alkali-silica reactions in concrete by substituting it for 10% of the cement.

Actions (login required)

View Item