DESIGN MIXES FOR IMPROVING THE ENGINEERING PROPERTIES OF SAND-CEMENT BASE COURSES ---PRE CONFERENCE PROCEEDINGS 3RD IRF MIDDLE EAST REGIONAL MEETING. TOWARDS BETTER ROAD PERFORMANCE, RIYADH, SAUDI ARABIA, 13-18 FEBRUARY 1988. 6 VOLUMES.

Sand-cement base courses have the economic edge over the conventional crushed stone base courses in countries where sand and cement are available in abundance. Despite the rather high compressive strength and corresponding modulus of elasticity usually obtained, the problem of shrinkage cracking associated with sand-cement is still not satisfactory solved. This research work is an extension of that published by the authors in the 2nd international conference on concrete technology for developing countries, which noted a significant increase in the tensile strength of sand-cement mixes by admixing lime or cutback into the mixes. The objective of this on going research is to determine the optimum design mix for tripoli region sand in terms of strength and cost. Optimum conditions were obtained with 10/90 lime-cement ratio and 20/80 bitumen-cement ratio for design mixes with 7 and 9% admixture contents. The cost analysis approach for the optimum design mixes indicate that the sand-cement-lime base has the lowest cost for 5, 7, and 9% admixture content and sand-cement-bitumen base with admixture content up to 7% is cheaper than the crushed rock base.(a) for the covering abstract of the proceedings see IRRD 817883.

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• Corporate Authors:

  International Road Federation

  525 School Street, SW
  Washington, DC  United States  20024
• Authors:
  • Benitayef, M A
  • Omer, M S
  • Asallai, B M
• Publication Date: 1988

Language

• Undetermined

Media Info

• Pagination: p. 5.321-5.34
• Serial:
  • Publication of: International Road Federation
  • Publisher: International Road Federation
  • ISSN: 1022-954X

Subject/Index Terms

• TRT Terms: Admixtures; Base course (Pavements); Calcium oxide; Cement; Compression; Conferences; Costs; Cracking; Developing countries; Liquid asphalt; Mix design; Modulus of elasticity; Natural resources; Optimization; Sand; Shrinkage; Soil stabilization; Stabilized materials; Strength of materials; Tension
• Uncontrolled Terms: Optimum
• Geographic Terms: Libya
• Subject Areas: Finance; Geotechnology; Highways;

Filing Info

• Accession Number: 00486950
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1989 12:00AM