Abstract
Zeolite can be used as an ingredient in warm bituminous mixes to reduce manufacturing temperatures. The zeolite for this purpose is usually synthetic, but natural zeolite can also be used. The research presented in this paper analyzed the use of natural zeolite from Cuba in the form of sand and filler as an additive in warm asphalt mixes and compared it to asphalt mixes with synthetic zeolite. The mixes were given the Marshall tests, and their moisture sensitivity and stiffness modulus values were also obtained. The results showed that both types of mix had a similar performance, which was only slightly lower than that of the reference mix. The use of different dosages of natural zeolite in the mixes gave the best results when the zeolite was incorporated as filler. This study demonstrated that the use of natural zeolite is an effective way of reducing the temperature of bituminous mixes.
Highlights
In the world today, road vehicles of all types have become the principal transportation mode for people as well as for goods and services
The main objective of this research was to evaluate the use of natural zeolite in the manufacture of warm asphalt mixes
The results showed that the mixes made with zeolite filler had a similar performance to those made with zeolite sand
Summary
Road vehicles of all types have become the principal transportation mode for people as well as for goods and services. Over the last thirty years, the traffic volume on road networks has soared, and this has led to increased loads on pavement surfaces. There is a growing need to find sustainable alternatives for the design and construction of roadways, which will increase their useful life and make them more cost-efficient and environmentally friendly. Research on sustainable materials focuses on innovative methods that can effectively deal with environmental issues such as global warming. Many nations signed it in an effort to attenuate global warming by increasing international awareness of the urgent need to reduce greenhouse gas concentrations from the emissions of substances such as carbon dioxide (CO2). In 2010, the European Union approved a 15% reduction of greenhouse gas emissions [6, 7]
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