Novel Gradation Design of Porous Asphalt Concrete with Balanced Functional and Structural Performances

Abstract

To improve the permeability of porous asphalt concrete (PAC) with a small nominal maximum aggregate size (NMAS) of 10 mm (PAC10), a novel gradation design by excluding the 0.075–3 mm aggregate was developed. This study aims to evaluate the functional and structural performances of the novel PAC10 with various mineral filler contents, using the conventional PAC10 and 13 mm NMAS PAC (PAC13) as reference, and develop the optimum gradation of the novel PAC10. The performance properties evaluated include moisture susceptibility, durability, high-temperature stability, low-temperature cracking resistance and permeability. The results indicated that for the two conventional PACs with the same fine aggregate and mineral filler content, PAC10 had worse permeability and rutting resistance, similar moisture susceptibility and durability, and better low-temperature cracking resistance, compared with the PAC13. The novel PAC10 showed better permeability than the conventional PAC10. With the increase of the mineral filler content, the structural performance of the novel PAC10 is improved, but its permeability is decreased. With a mineral filler content of 6%, the novel PAC10 can have balanced functional and structural performances, which are equivalent to those of the conventional PAC13.

Determination of Optimum Bitumen Content in Porous Asphalt Pavement by Different Methods

“…The tensile strength ratio is applied only for porous asphalt design in Switzerland [9]. Various Departments and Agencies in USA applied the mix design method suggested by the National Center for Asphalt Technology (NCAT) in 2002 [12] and edited in 2004 [13,14]. The general aspect of these mix design methods depended on the assessment of volumetric characteristics, such as average air voids content as the primary factor to specify the design bitumen content.…”

Evaluation of Siltation Degree of Permeable Asphalt Pavement and Detection of Noise Reduction Degree

“…Permeable pavements can effectively reduce water accumulation on urban roads. Permeable pavements, obtained by means of porous asphalt concrete (PAC), have attracted increasing attention due to the benefits that they provide, such as reduced traffic noise, good visibility and a better pavement skid resistance on rainy days, which is achieved by the drainage capability of this type of mix and by the macro-texture that appears due to the aggregate gradation of the mixtures [1][2][3]. A permeable pavement with good water permeability can reach a penetration rate of over 130 mm/h [4][5][6][7][8][9][10][11][12][13].…”