Experimental on bonding performances of UHPCthin asphalt
layer with epoxy adhesive agents for ultrahigh
performance composite bridge deck
(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年1期
- Page:
- 49-57
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Experimental on bonding performances of UHPCthin asphalt
layer with epoxy adhesive agents for ultrahigh
performance composite bridge deck
- Author(s):
- LI Jia1; 2; DONG Liang1; 3; ZHANG Jian1; 4; YUAN Peng1
- 1. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. Key Laboratory for
Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, Hunan, China;
3. Shenzhen Comprehensive Transportation Design and Research Institute Co., Ltd., Shenzhen
518003, Guangdong, China; 4. Investment Management Company of China Construction
Fifth Engineering Bureau, Changsha 410004, Hunan, China
- Keywords:
- road engineering; epoxy adhesive agent; bonding performance; ultrahigh performance concrete (UHPC); composite bridge deck
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to ensure strong bonding between ultrahigh performance concrete (UHPC) and thin surface layers, and prevent early damage such as cracking, upheaval, slipping, thin 〖JP2〗surface layer lifting, etc., the performances of epoxy interface adhesives were investigated to reduce construction costs. The ultrahigh performance lightweight composite bridge deck system consisted of a steel plate (35 to 50 mm) UHPC and thin asphalt surface layer. The epoxy adhesion agents 202 imported and domestic 2766 were selected to carry out laboratory tests, and their interfacial mechanical properties and aging resistance were compared. Under normal temperature and hightemperature conditions,〖JP〗 the interlaminar oblique shear test, tensile test, and interfacial adhesion pull test were conducted on UHPCSMA composite specimens to investigate the bonding performances both 202 and 2766. The deterioration of mechanical properties of epoxy interfacial agents were summarized after repeated freezethaw cycles at high temperature with saline water, which simulated water damage and chlorine salt erosion. The results show that adhesion agents 2766 and 202 have high bonding strength. At normal temperature，the shear strengths of 2766 and 202 are almost the same, however, the drawing strength of 2766 is 18% lower than that of 202. At high temperature, the bonding performances of 2766 and 202 decreased, but are still better than those of asphalt adhesive materials. The shear strength and drawing strength of 2766 are 131% and 109% higher than that of 202, respectively, and it also has better hightemperature stability. In the unfavorable natural environments of water immersion damage and chloride erosion, the degradation laws of 2766 and 202 are similar, but the degrees of deterioration are different. The aging resistance of 2766 is better than that of 202. The effect of the freezethaw cycle is greater than that of the hightemperature cycle of chloride salt on both 2766 and 202. Therefore, the local epoxy adhesion agent 2766 can replace imported products because its comprehensive unit price is approximately 40% lower than that of 202, it is widely available, the construction/application process is simple, and the dosage control is accurate.
Last Update: 2020-01-17