CEMENT STABILIZATION OF ROADS

1
CEMENT STABILIZATION OF ROADS

• CSIR Transportek
• Frank Netterberg
• Soillab
• (CCI Steering Committee)

2
Terms of Reference

• Consortium was contracted by the Cement and
  Concrete Institute (CCI) 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

• Interviews within the industry (completed)
• Design laboratory test programme (completed)
• Carry out laboratory testing (commencing shortly)
• (First material identified and being collected)
• (Cements being organised)

4
Laboratory test programme

• Initial programme was to
• Test five suitable materials
• Use 7 different cements
• Study effect of
• Time ?
• Temperature ? on strength, workability
• Cement composition ? and durability
• This would require about R8 million and about 196
  tonnes of material

5
Revised programme

• Seven cements
• Two materials
• Initially workability and strength to be assessed

6
Cements
Full range of standard and non-standard cement
tests on each cement
7
Materials
Dolerite (low plasticity index (PI lt 6)
Dolerite (medium-high PI (10 - 16)
Full range of standard and non-standard material
tests on each sample
8
Stabilisation tests

• All tests at 3 cement and 100 Mod AASHTO
  effortMaterials compacted after 2 and 4
  hoursMaterials conditioned at 10, 23 and
  45ºCCured for 7 days at 23C and 95-100
  humidity Tested for density and strength (CBR,
  UCS and ITS)

9
Proposed programme

• Initiate material testing Mid November 2002
• Complete initial tests End February 2003
• Report End March 2003