In Free State, South Africa, engineers explored the use of untreated Kalahari sand for road construction through an innovative trial. Various road sections were built using different materials, including untreated sand and crushed rock. Remarkably, after 55 years, these roads remained structurally sound and traffic-worthy. Following successful tests in Botswana, this groundbreaking method offers a budget-friendly alternative for rural road development in dry climates.
Read more at Times of India
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