This report presents recommended guidelines for hot mix asphalt pavement construction to achieve satisfactory levels of in-place air voids and permeability. These guidelines were developed from the findings of a research project that examined the relationship of air voids content to permeability and hot mix asphalt lift thickness. (Author/publisher) This report may be accessed by Internet users at http://gulliver.trb.org/publications/nchrp/nchrp_rpt_531.pdf
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