Evaluation of Epoxy Asphalt Concrete Damping Parameters Using Impact Resonance Test

2012 ◽  
Vol 40 (5) ◽  
pp. 20120058 ◽  
Author(s):  
Leilei Chen ◽  
Zhendong Qian ◽  
Lei Zhang
Keyword(s):  
Asphalt Concrete ◽  
Epoxy Asphalt ◽  
Resonance Test ◽  
Impact Resonance ◽  
Epoxy Asphalt Concrete

Performance Evaluation of a Novel High Durability Epoxy Asphalt Concrete for Bridge Deck Pavements

2014 ◽  
Vol 488-489 ◽  
pp. 550-553
Author(s):  
Xing Song Cao ◽  
Dong Wei Cao ◽  
Shi Xiong Liu ◽  
Xio Qiang Yang ◽  
Lin Lan
Keyword(s):  
Asphalt Concrete ◽  
Bridge Deck ◽  
Asphalt Binder ◽  
Laboratory Evaluation ◽  
Suitable Material ◽  
Long Span ◽  
Epoxy Asphalt ◽  
High Durability ◽  
Specimen Test ◽  
Epoxy Asphalt Concrete

A novel high durability epoxy asphalt concrete for bridge deck pavements is introduced in this paper, including the manufacturing process of epoxy asphalt binder and laboratory evaluation for this material. Various laboratory tests were conducted to evaluate the pavement performance of the materials, such as fatigue test, wheel tracking test, moisture susceptibility test and thermal stress restrained specimen test. Test results show that epoxy asphalt concrete has 20137 cycles/mm dynamic stability at 70°C, and-28.4 °C fracture temperature. The fatigue equations of epoxy asphalt concrete at different temperatures were obtained. Findings from the research indicate that the epoxy asphalt concrete is a suitable material for the pavement of long-span steel bridges in China due to its profound performance.

INCREASING THE PROPERTIES OF ASPHALT CONCRETES BY USING THE EPOXID FORMATION

2019 ◽  
pp. 46-50
Author(s):  
Valerii Vyrozhemskyi ◽  
Ivan Kopynets ◽  
Oleksii Sokolov
Keyword(s):  
Epoxy Resin ◽  
Asphalt Concrete ◽  
Water Saturation ◽  
Asphalt Pavement ◽  
Average Density ◽  
Transverse Cracks ◽  
Epoxy Asphalt ◽  
Thermosetting Polymers ◽  
Winter Time ◽  
Epoxy Asphalt Concrete

One of the main reasons of low durability of asphalt concrete are the properties of bitumen which is the most sensitive of all its components to the action of external factors. As thermoplastic material, bitumen becomes soft at high summer temperatures leading to rutting, shear and sags formation. At low winter time temperatures it becomes fragile and rigid that due to low-temperature compression of asphalt pavement causes the occurrence of transverse cracks. The most effective direction for increasing the durability and roughness of asphalt pavement is changing the bitumen behavior by various types of additives modification. Among the issues related to all known modifiers, the least studied is the issue of using thermosetting polymers, namely, epoxy components. The main problem with the use of epoxy resins for modification is that under the influence of high process temperatures a rapid hardening of the epoxy resin after combining with the hardener occurs. Such behavior of epoxy components limits the temperature modes and the duration of process operations for the production, transportation and placement of epoxy asphalt mixtures. In this paper, the results of the study of epoxy-asphalt concrete obtained using the cut-back bitumen are presented. The dilution of bitumen allows reducing the process temperatures of the production of epoxy asphalt concrete mixtures which increases the time for their transportation and compaction. As a result of hardening of the epoxy resin, over time, a significant increase in the strength of the epoxy asphalt concrete occurs at all temperatures. The rate of hardening of epoxy asphalt depends on the temperature of the environment. As the temperature rises, the reaction rate between the epoxy resin and the hardener increases, which is reflected in the growth of the strength of the epoxy asphalt concrete at all test temperatures, the more intense evaporation of the solvent and, consequently, the growth of water saturation and the decrease in average density. Keywords. epoxy binder, epoxy asphalt concrete, epoxy resin, modification, cut-back bitumen.

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