Laboratory:
Highway Pavements And Materials Lab The function of binder in bituminous mixtures are very much affected by the percentage of binder and the grading of aggregates in road mixtures. The behavior of those mixture under traffic loads and climatic condition depends largely on the binder content . Based on the grading of aggregates , as the number of fine particles increases, the amount of bituminous binder needed to coat these surfaces also increase. As a result , grain –size distribution were developed for percentage of bitumen . To check these proportions to meet the specifications, this test is performed.
Standard : B.S. 598
Test - equipment
- Sieving extractor.
- centrifuge extractor.
- Cylindrical vessel.
- Volumetric flask of 250 ml.
- Metal bottle of about 2500 ml .
- Recovery apparatus comprising a water bath , with an electrical heater
- Vacuum gauge .