Impacts of Re-heating and compaction temperatures on hot mix asphalt volumetrics

الملخص EN

The need for accurate, consistent laboratory tests of the volumetric properties of the hot mix asphalt (HMA) has become increasingly important in the past few years.

The objective of this study was to evaluate the effect of re-heating and compaction temperatures on the volumetric properties of the HMA mixtures.

These effects were studied with two experiments.

In the first experiment, mix was compacted after 0, 3 and 20 hour's storage time.

In the second experiment, mix was compacted at three different temperatures; standard target compaction temperature for the grade of asphalt cement in the mixture, target - 14oC and target + 14o C.

Above and under superpave restricted zone graded mixtures comprised of two sources of aggregates, and one type of binder were compacted with the Marshall compactor machine and their volumetric properties measured.

The results show that there are significant differences in volumetric properties as the mix stored by 3 hours or more and changes in volumetric properties occur as the compaction temperature varies.