Evaluation of the application of the banana peel ash as a road subbase stabilizer in Uganda

Abstract

The scarcity of suitable materials for road construction is a growing concern, exacerbated by the depletion of natural resources and increasing environmental regulations. In Uganda, the demand for road infrastructure development is high, but the availability of suitable materials is limited. The traditional sources of road construction materials, such as limestone are dwindling, and alternative materials are needed to meet the growing demand. Renewable materials for sustainable road construction, such as natural food waste ash, offer a promising solution with environmental benefits by reducing landfill waste and reducing waste dumping. The United Nations Environment Program estimates that 33-50% of global food production is never consumed, leading to household food waste of 103kg/capita/year in Uganda (United Nations Environment Program, 2021). Organic waste accounts for 90% of solid waste, with banana peels and leftovers contributing 33.3% and cassava peels and stems 27.9% respectively, highlighting the need for reduction. (Ssepuuya et al, 2023). Sustainable Development Goal 12.3 aims to halve food waste by 2030, addressing climate change, biodiversity loss, and pollution. This reduction improves food security, saves money, and reduces pressure on land, water, and biodiversity. However, research is needed to evaluate the effectiveness of banana peel ash as a road subbase stabilizer and soil engineering enhancer, and to determine its potential as a sustainable alternative to traditional materials. Addressing this knowledge gap is crucial for transportation engineers and policymakers seeking to ensure a sustainable and environmentally friendly approach to road construction.