Abstract
To improve the safety of orthotropic steel bridge decks and the construction efficiency of bridge deck pavement by enhancing the performance of pavement materials, a new-generation, high-performance cold-mix resin was prepared by carrying out the combination of micro-characteristic analysis and performance test. Meanwhile, the pavement performance and fatigue performance of high-performance cold-mix resin mixtures and hot-mix epoxy saphalt mixtures as a control group were studied experimentally. The results show that different kinds of epoxy resins show bisphenol structure in essence. The curing exothermic peak temperature of the cold-mix resin increases with the heating rate. Both the specific heat capacity (△CP) of cold-mix resin and cold-mix resin asphalts exhibit a sudden change between −20 °C and 40 °C. In resin asphalt mixtures, cold-mix resin forms the network structure skeleton whereas the asphalt distributed in the form of tiny particles. The dosage of respective component has a significant effect on the tensile strength and elongation at break of cold-mix resin. Compared with hot-mix epoxy asphalt mixtures, cold-mix resin mixtures exhibit comparable water stability and high and low-temperature performance, as well as greater fatigue life.
Highlights
Orthotropic steel bridges have advantages, such as being light, able to span large distances, a high bearing capacity and convenient construction [1,2,3,4]
Epoxy asphalt materials widely employed in China mainly includes hotmix epoxy asphalt (HMA) and warm-mix epoxy asphalt (WMA)
In order to obtain and maintain the fluidity of hot-mix epoxy asphalt during construction, a large amount of heat was supplied by machinery through energy consumption [10]
Summary
Orthotropic steel bridges have advantages, such as being light, able to span large distances, a high bearing capacity and convenient construction [1,2,3,4]. In the construction of long-span bridges (such as river and sea-crossing bridges) and overpass bridges (such as bridges over railways and highways), light-weight orthotropic steel bridge structures with the employment of epoxy asphalt as a paving material are more extensively used [5,6]. In order to obtain and maintain the fluidity of hot-mix epoxy asphalt during construction, a large amount of heat was supplied by machinery through energy consumption [10]. Researchers paid more attention to improving the performance of epoxy asphalt mixtures
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