Abstract
Zeolite materials are used in the warm mix asphalt technology as an asphalt foaming additive, which partially replaces the filler. This article analyzes the influence of the zeolite and other fillers addition on the properties of mastic asphalt. In the research, 35/50 penetration grade asphalt and three types of fillers were used: lime filler (L), zeolite tuff (clinoptilolite) (C), hydrated lime (H) and their mixed combinations (C:L in 1:1 and 1:3 proportions as well as C:L:H in 2:2:1 ratio). The characteristics of the materials included: chemical analysis, phase composition and particle size distribution. The following properties were determined on the asphalt mastic samples: penetration, softening point, penetration index, dynamic viscosity and stiffening measured by softening point increase. It was found that clinoptilolite could partially replace the traditional lime filler, without a negative impact on the asphalt mastic properties. Additionally, the hydrated lime inclusion should have a positive effect on the frost resistance of an asphalt mix.
Highlights
Asphalt pavements are the dominant type of road surfaces in both Europe and the world
The analysis of the test results shows that the addition of lime filler, clinoptilolite or hydrated lime did not significantly affect the properties of tested bitumen such as: consistence, softening point, thermal sensitivity and dynamic viscosity
Considering the stiffening properties of zeolite tuff, just like the limestone, it can be used as a stand-alone filler in an asphalt mix, despite the greater bitumen hardening
Summary
Asphalt pavements are the dominant type of road surfaces in both Europe and the world. In addition to mineral aggregates in the asphalt mixture, the filler is one of the major components of the asphalt mixture, which constitutes from a few to several percent. The filler and asphalt mixed together form the so-called asphalt mastic, the properties of which significantly affect the adhesion of mineral aggregates and asphalt as well as the performance of final asphalt mix [3,4,5]. The use of the right type and amount of filler improves the asphalt pavement properties such as stability, durability or even skid resistance. Too much filler causes the asphalt mix to become more fragile and susceptible to low-temperature cracking [6]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call