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CEMENT STABILIZATION OF ROADS

CEMENT STABILIZATION OF ROADS. CSIR Transportek Frank Netterberg VKE/Soillab (C&CI Steering Committee). Terms of Reference. Consortium was contracted by the Cement and Concrete Institute (C&CI) on behalf of its members to:

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CEMENT STABILIZATION OF ROADS

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  1. CEMENT STABILIZATION OF ROADS CSIR Transportek Frank Netterberg VKE/Soillab (C&CI Steering Committee)

  2. Terms of Reference • Consortium was contracted by the Cement and Concrete Institute (C&CI) on behalf of its members to: • Investigate the influence of the new SABS EN 197-1 cement specifications on the use of cement as a road material stabilizer (ie is TRH 13 still appropriate).

  3. Progress and programme • Interviews within the industry (completed) • Design laboratory test programme (completed) • Carry out laboratory testing (completing ±3 weeks) • Report (end July 2003) • Workshop

  4. Test programme • Seven cements • Two materials • Initially workability and strength to be assessed

  5. Cement Source Specific characteristics CEM I 42,5 CEM I 42,5 CEM II A-M (S) 42,5 CEM II A-M (L) 42,5 CEM II A-L 32,5 CEM II B-V 32,5 CEM III A 32,5 PPC Hercules OPC Lafarge Lichtenburg Duratech Alpha Roodepoort Lafarge Lichtenburg Powercrete PPC Slurry Surebuild Alpha All Purpose NPC Eagle Pro High C3A content Mod C3A content Portland composite (Slag) Portland composite (limestone) Portland limestone cement Portland flyash cement Blastfurnace cement Cements Full range of standard and non-standard cement tests on each cement

  6. Materials Dolerite (low plasticity index (PI < 6) Dolerite (medium-high PI ±10) Full range of standard and non-standard material tests on each sample

  7. Stabilization tests All tests with 3% cement and at 100 % Mod AASHTO effort All tests use < 37.5 mm fraction Materials compacted after 2 and 4 hoursMaterials conditioned at 10, 23 and 40ºCCured for 7 days at 23°C and 95-100% humidityTested for density and strength (UCS and ITS)

  8. Results

  9. CEM 1

  10. CEM II (23oC)

  11. CEM II 40oC

  12. CEM III

  13. bryan@cnci.org.za

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