• F. M. ALAYAKI Department of Civil Engineering, Federal University of Agriculture, Abeokuta
  • A. AL-TABBAA Engineering Department, University of Cambridge, United Kingdom
  • M. J. AYOTAMUNO Faculty of Engineering, Rivers State University of Science and Technology, Nigeria
Keywords: Drill Cuttings Ash, Soil, Stabilisation, road construction, Niger Delta


his study investigated potential of the use of Drill Cuttings Ash (DCA) in the stabilisation of Niger Delta soils for road construction. Most of the in-situ soils encountered in the region are fine-grained and highly plastic that would require special treatment. Four soil samples were obtained and the following tests were carried out: classification, compaction, California Bearing Ratio (CBR), and Unconfined Compressive strength (UCS). Dry DCA quantities ranging 2 – 8 percentages by weight of the soil was added to the air-dried soils for the stabilisation process. They were classified as A-6 (clayey soil), A-2-6 (clayey sand), A-3 (silty fine sand), and A-4 (silty clay soil). Generically, the unstabilised soils were fine-grained having low to medium plasticity, with low shear strength. Other results showed that 6% DCA content caused improvement in the texture, plasticity, and dry density of the clayey soil, while its CBR and UCS parameters compared favourably well with the unstabilised soil values. Also, there was increase in CBR value of the clayey soil after soaking for 24 hours. DCA increased the plasticity of the clayey sand, silty fine sand, and silty clay soil, and there was no substantial improvement in their strength properties. These results showed that DCA would be useful in improving clayey soilswhich are known to be prone to excessive swelling and difficult to handle during construction especially after heavy rainfall.





Akpokodje, E. G. 1987. The engineering – geological characteristics and classification of the major superficial soils of the Niger Delta. Engineering Geology, Vol. 23, pp. 193 – 211, Elsevier Science Publishers. B. V., Amsterdam.

Al-Ansary, M. S., Al-Tabbaa, A. 2007. Stabilization/solidification of synthetic petroleum drill cuttings. Journal Hazardous Materials,Vol. 141, 2007, pp. 410-421.

Bin-Shafique, S., Edil, T., Benson, C., Senol, A. 2004. Incorporating a fly ash stabilised layer into pavement design – case study. Geotechnical engineering, Institution of Civil Engineers, London. Vol. 157 No. GE4, 239 – 249.

Bose, B. 2012. Geo engineering properties of expansive soil stabilized with fly ash, Electronic Journal of Geotechnical Engineering, Vol. 17, Bund. J, pp. 1339-1353.

British Standards 1377. British Standard Methods of test for Soils for Civil Engineering Purposes, British Standards Institution, London, 1990.

British Standards 1924. Stabilized Materials for Civil Engineering Purposes Parts 1 and 2. British Standards Institution, 1990.

Brooks, R., Udoeyo, F. F., Takkalapelli, K.V. 2011. Geotechnical Properties of Problem Soils Stabilized with Fly Ash and Limestone Dust in Philadelphia. Journal of Materials in Civil Engineering, 23(5): pp 711-716.

BS EN 197-1 (2000): Cement — Part 1: Composition, Specifications and Conformity Criteria for Common Cements. BSI 9 July 2004, ISBN 0 580 36456 9.

Dreyfus, J. 1952. Laterites. Rev. Gen. Routes Aerodromes 22 (245): 88 – 100. In: Gidigasu, M. D.1976.Laterite soil Engineering: Pedogenesis and Engineering Principles. Elsevier Scientific Publishing Company, Amsterdam Oxford, New York. 554pp.

Edil, T. B., Acosta, H. A. Benson, C. H. 2006. Stabilising Soft Fine-grained Soils with Fly Ash. Journal of Materials in Civil Engineering, pp 283 – 294.

Federal Environmental Protection Agency (FEPA Guidelines) 1991. Assessed on 04/06/2014.

Ibrahim, H. H., Birnin-Yauri, U. A., Muhammad, C., Umar, A. 2012. Assessment of Pollution Potentialities of Some Portland cement. Nigerian Journal of Basic and Applied Science NJBAS, 20(2): 182-184.

Ifeadi, C. N.2004. The treatment of drill cuttings using dispersion by chemical reaction (DCR). DPR – HSE International Conference on Oil and Gas Industry in Nigeria. Port Harcourt, Nigeria, Dec. 2004.

Little, D. N., Nair S. 2009. Recommended Practice for Stabilization of Subgrade Soils and Base Materials. National Cooperative Research Program (NCHRP) Project 20-07, Transportation Research Board, 67pp.

Senol, A., Edil, T. B., Bin-Shafique, S., Acosta, H. A., Benson, C. H. 2006. Soft Subgrades Stabilization by using Various Fly Ashes. Resources, Conservation and Recycling, 46, pp 365–376.

Sezer, A., Inan, G., Yılmaz, H. R., Ramyar, K. 2006. Utilization of a very high lime fly ash for improvement of Izmir clay. Building and Environment, 41, 150–155.

United States Environment Protection Agency (USEPA) 6200 Method (2007): Field Portable X-ray Fluorescence Spectrometry for the Determination of Elemental Concentrations in Soil and Sediment.

Vukicevic, M., Maras-Dragojevic, S., Jockovic, S., Marjanovic, M., Pujevic, V. 2013. Research Results of Fine-grained Soils Stabilisation using Fly Ash from Serbian Electric Power Plants. Proceedings of 18th Int. Conf. on Soil Mech. and Geotech. Engrg. Paris, pp 3267 – 3270.

Walker, D. R. 2013. United States Environment Protection Agency (USEPA) 8270 Method for Semi-volatile Organic Compounds (SVOC) Analysis on the 5977A Series GC/MSD. Agilent Technologies, USA.