Strength and Leaching Characteristics of Crude Oil Contaminated Sandy Soil Stabilized with Sawdust Ash-Cement

Utilization of waste sawdust ash to enhance the engineering properties of soil and the beneficial reuse of contaminated soils would foster environmental sustainability in developing countries, especially Nigeria. This research investigates the safe reuse of crude oil contaminated sandy soil in highway pavement construction application. Sandy soils (Patani sand) sampled from the Forcados River in Niger Delta, Nigeria and were artificially contaminated with crude oil from Afisere Flow Station Delta State, Nigeria. An innovative and traditional binder mix, saw dust ash-cement (SDAC) mixed in the ratio of 2:1, was added to aged contaminated sandy soil at 5% and 10% by weight. Strength, environmental performance evaluation and microstructural tests were performed on the samples to evaluate the strength characteristics and environmental suitability of stabilized crude oil contaminated soils (COCSs). The strength evaluation tests include California bearing ratio (CBR), unconfined compression and direct shear tests. The soaked CBR value increased from 41% - 57% when stabilized with 5% SDAC and from 58% - 79% when stabilized with 10% SDAC. The leaching of a selected sample (COCSs) stabilized with 10% binder over a period of 90 days, shows the reduction of leachate TPH from 66.25mg/l after 7 days to 47.38 after 90 days.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 582-590
  • Monograph Title: Geo-Chicago 2016: Sustainable Waste Management and Remediation

Subject/Index Terms

Filing Info

  • Accession Number: 01611818
  • Record Type: Publication
  • ISBN: 9780784480168
  • Files: TRIS, ASCE
  • Created Date: Aug 11 2016 3:15PM