Cold-mixed epoxy bitumen (CEB) has been presented as an eco-friendly paving material used for steel bridge deck pavements. This study performed an investigation on three preparation methods of CEBs, which includes one kind of three-component and two kinds of two-component methods. The curing process was characterized through the viscosity measurement. Meanwhile, the microstructure of CEBs was observed using fluorescence microscopy. Mechanical properties of CEBs prepared with different methods were characterized by employing direct tensile tests and dynamic mechanical analysis (DMA). Finally, thermogravimetric analysis (TGA/DTG) was conducted to feature the thermal stability of CEBs. The results indicated that the preparation methods significantly affected the performance of cured CEBs, although the same mix design was adopted. The curing temperature determined the curing rate of CEBs, while the preparation methods dominated the morphological characteristic of cured CEBs. The three-component preparation method can achieve acceptable mechanical performance for engineering requirements. As for two-component methods, the curing agent is supposed to be mixed with bitumen to obtain satisfying microstructures of CEBs.
|Materials and Structures/Materiaux et Constructions
|Early online date
|23 Mar 2021
|Published - Apr 2021
Bibliographical noteFunding Information:
Open Access funding enabled and organized by Projekt DEAL. The authors would like to acknowledge the financial support provided by the German Research Foundation (OE 514/10-1) and the German Research Foundation (DFG, No. OE 514/1-2, FOR2089). The authors also gratefully acknowledge financial support from the China Scholarship Council (CSC No. 201706710009).
- Cold-mixed epoxy bitumen
- Mechanical properties
- Microscopic morphology
- Preparation method
- Thermal stability