Abstract
Compaction of hot mix asphalt is influenced by several factors; some related to the environment, some determined by mix and structural design and some by contractor during construction. The temperature of asphalt mixture has the biggest influence on the compaction of asphalt mixtures and their properties. The temperature of asphalt mixture affects viscosity of bitumen and achievement of the maximum density of asphalt mixture. This paper describes a laboratory study on the effects of different installation temperatures on the physico-mechanical properties of specimens of asphalt mixtures: stability, Marshall Quotient (stiffness), density, voids and voids filled with asphalt. By regression analysis of the test results the correlation of certain properties of asphalt mix and compaction temperatures was established. For all the models observed, the coefficients of determination are very high and indicate very solid links. The obtained research results indicate a pronounced effect of compaction temperature on each tested property of asphalt mix.
Highlights
Compaction of hot mix asphalt is influenced by several factors; some related to the environment, some determined by mix and structural design and some by contractor during construction
This paper describes a laboratory study on the effects of different installation temperatures on the physico-mechanical properties of specimens of asphalt mixtures: stability, Marshall Quotient, density, voids and voids filled with asphalt
Hot mix asphalt (HMA) is a mixture of minerals and asphalt binder produced by hot process at temperatures ranging from 135 °C to 170 °C
Summary
Hot mix asphalt (HMA) is a mixture of minerals (stone chips, sand and stone dust) and asphalt binder produced by hot process at temperatures ranging from 135 °C to 170 °C. The process of transportation is considered critical because, in addition to the price, it affects the quality of asphalt mixture, and the installation is critical because it affects the quality of the embedded layer (Roberts et al 1996) In both of the aforementioned procedures, temperature changes in the asphalt mix mostly reflect the physico-mechanical properties of asphalt mixture and directly affect the layer compaction. The aim of the researches described in this paper was to determine the effect of different installation temperatures on the physico-mechanical properties of asphalt mixture specimens (under laboratory conditions) as well as to establish their dependence correlation
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