Improving the Mechanical Properties of Natural Soil Using Rice Husk Ash and Soy Bean Hull Ash in Biu – Borno State. International Journal of Builders in Academia, [S. l.], v. 1, n. 2, 2026. DOI: 10.36108/ijba/5202.10.0280. Disponível em: https://www.ijba.org.ng/index.php/ijba/article/view/67. Acesso em: 29 aug. 2026.