Cassava Peel Ash Stabilized Lateritc Soil as Highway Pavement Material

Cassava peel ash (CPA) was used to stabilize lateritic soil (LS) as highway material. The treated soil was subjected to British Standard heavy (modified Proctor) compactive effort and tested in order to determine the index properties, compaction characteristics (maximum dry density, MDD and optimum moisture content, OMC) and strength characteristics (unconfined compressive strength, UCS and California bearing ratio, CBR) of the treated soil. Test results show that the properties of LS improved when treated with CPA. The particle size grading for 100% LS shows a composition of predominantly 99.6% coarse aggregates and 0.4% fines. This composition, however, improved with the addition of CPA to contain 94.3 - 99.6% coarse aggregates and 0.4 - 5.7% fines for the various LS - CPA mixes. The optimum mix of 70% LS + 30% CPA which gives the maximum UCS values of 630.59 kN/m² (1st day-unsoaked), 577.67 kN/m² (7th day-unsoaked) and 1009.40 kN/m² (7th day-soaked) and CBR values of 55% (soaked for 24 h) and 35% (unsoaked) can be used as subbase and subgrade materials in road construction. Further works may be assessed in terms of the resilience modulus of the material.


  • English

Media Info

  • Media Type: Web
  • Pagination: pp 375-382
  • Monograph Title: Pavement Materials, Structures, and Performance

Subject/Index Terms

Filing Info

  • Accession Number: 01527769
  • Record Type: Publication
  • ISBN: 9780784413418
  • Files: TRIS, ASCE
  • Created Date: May 22 2014 3:03PM