Friday, March 30, 2012

DENSITY AND VOIDS ANALYSIS OF BITUMINOUS MIX SPECIMEN


Soon after the compacted bituminous mix specimens have cooled to room temperature, and then the weight, average thickness and diameter of the specimen are noted. The specimens are also weighed in air and then in water. The bulk density value Gb of the specimen is calculated from the weight and volume. The voids analyses are made as given below:

Where,
            Vv = air voids in the mix, %
                        Vb = volume of bitumen
                        VMA = voids in mineral aggregates, %
                        VFB = voids filled with bitumen %

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