AASHTO T 37-07 (2020) PDF Download

The AASHTO T 37-07 (2020) standard, which is similar to ASTM D546-05 with some specific provisions, focuses on the sieve analysis of mineral filler used in hot-mix asphalt (HMA). The purpose of this standard is to determine the particle size distribution of the mineral filler, which is an essential component of HMA. The mineral filler acts as a binder and helps to improve the performance and durability of the asphalt mixture.

The test described in this standard involves sieving the mineral filler through a series of sieves with different mesh sizes. The sieves are arranged in a stack, with the coarser sieves placed at the top and the finer ones at the bottom. The mineral filler is then placed on the top sieve and subjected to mechanical agitation to ensure proper separation of particles.

Once the sieving process is complete, the retained material on each sieve is weighed and expressed as a percentage of the total sample weight. This data is used to determine the particle size distribution of the mineral filler. The standard provides guidelines on the calculation and reporting of the results, including the percentage passing each sieve size.