Preliminary assessment of the properties of composite layers based on porous asphalt and coloured mortar

Bialystok University of Technology, Wiejska 45E, 15-351 Bialystok, Poland

^* Corresponding author: dominik.grzyb@doktoranci.pb.edu.pl

Abstract

The paper presents the results of the properties of composite layers made of porous asphalt, with a void content above 30%, filled with a special-coloured mortar. Three mortars of white, red and blue colours were selected, whose compressive strength after 2 days was over 60 MPa and the flexural strength was over 7 MPa. The study of composite layer aimed at determination of the water sensitivity expressed in ITSR (Indirect Tensile Strength Ratio) according to the standard EN 12697-12 (method A) and rutting resistance according to standard EN 12697-22 in the small apparatus (method B). The results indicate that such solutions will be justified in places with extremely heavy traffic, such as bus stops. In addition, the condition of the layer surface after simulating its wear was assessed using of the CTM (Circular Track Meter), the BPT (British Pendulum Tester) and a reflectometer. The results indicate that they can be used in areas with low speed limits. On the other hand, the possibility of introducing the pigment into the mortar has a positive effect on surface of those elements of the communication system, which should have a different color than the road surface. These are the surfaces of bicycle paths, pedestrian and bicycle routes, areas of intersections, where their visibility plays an important role due to the safety of users.