1. AASHTO (1986). Standard specification for transportation materials and methods of sampling and testing, 14th Edition, Washington, D.C.
2. Effect of compactive efforts on hydraulic conductivity of black cotton soil treated with cassava peel ash;Adeyemo;Uniosun J. Eng. Environ. Sci. (UJEES),2019
3. Effect of bagasse ash on the properties of cement stabilized black cotton soil;Ahmad;Int. J. Transp. Eng. Technol.,2017
4. A comparative study on the impact of Avu and Ihie dumpsites on soil quality in southeastern Nigeria;Amadi;Am. J. Chem.,2012
5. ASTM, (1992), Annual Book of Standards, Vol. 4(8), American Society for Testing and Materials, Philadephia.