Page 26 - Unit 2: Pavement Material

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Type of test The objectives of tests on road construction materials

Soundness (AASHTO-T :104)
• To determine resistance to disintegration due to cycle of wetting and drying, heating and
cooling (weathering)

• Aggregates are soaked in solution of sodium or magnesium sulphate for 16-18 hours.
Remove sample and put in oven at 105C or 16-18 hours. Repeat the same process until
complete 5 circles. Then wash and dry the sample. Sieve the sample and calculate :

Soundness = Weight of loss x 100
Weight Original

Result before and after soaked in solution

Sodium or magnesium sulphate
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Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my