Page 29 - UNIT 3 - CONSTRUCTION OF FLEXIBLE PAVEMENT

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Tests that should be carried out to ensure the quality
Concept
of the sub-base and road base layers

Following are some of the standard tests, used to evaluate the strength properties of the soil.
• C.B.R test

• Plate bearing test
• Triaxial compression test

• LOI, LL and PL

• ACV
• FI
• Soundness

• Grading

The sub-base spec: CBR soaked ≥ 30% (if ≥ 10% retained on 20mm, can be assumed passed),
PI ≤ 12, TFV ≥ 30kN, Sand equivalent ≥ 45

The roadbase spec: PI ≤ 6, ACV ≤ 25, FI ≤ 30, Soundness ≤ 18, CBR ≥ 80%, Sand equivalent ≥ 45

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Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my