TY - JOUR
T1 - Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete
AU - Sun, Nannan
AU - Song, Yifan
AU - Hou, Wei
AU - Zhang, Hanhao
AU - Wu, Datong
AU - Li, Yuan
AU - Gong, Yuan
N1 - Funding Information:
This study was sponsored by the Natural Science Basic Research Program of Shaanxi (Grant no. 2020JQ-377). The financial support is gratefully appreciated. The assistance for experimental studies from China Chengdu Datong Road Bridge Machinery Company Limited, Chang'an University, is also appreciated. The China Scholarship Council is acknowledged for the financial support and assistance to the first author.
Publisher Copyright:
© 2021 Nannan Sun et al.
PY - 2021/9/25
Y1 - 2021/9/25
N2 - It is necessary to pay attention to the bonding strength of the interface between precast normal strength concrete (NSC) and cast-in-place epoxy resin concrete (EMR) when using EMR as a repair or filling material or an overlay in bridges' rehabilitation. However, the performances of epoxy concrete are different due to differential mix ratios; thus, the bonding properties between various epoxy resin concrete and cement concrete are not completely the same. This article investigated the interfacial bond properties between NSC and ERC by direct tensile, push-out, and slant shear test with specimens of special size and structure and observed the interfacial bond strength and corresponding failure modes. The minimum bond strength under direct tension was 0.72 MPa, while the minimum bond strength was 1.71 MPa and 3.19 MPa for the push-out test and slant shear test, respectively. Results indicated that the slant shear test specimens with an inclination angle of 45° are not suitable for the slant shear test due to higher compressive stress. Furthermore, the cohesion and friction coefficient of interface bond strength were calculated inversely in accordance with the results obtained from the corresponding direct tensile and slant shear tests. The minimum cohesion value was 1.71 MPa, and the minimum friction coefficient value was 0.46.
AB - It is necessary to pay attention to the bonding strength of the interface between precast normal strength concrete (NSC) and cast-in-place epoxy resin concrete (EMR) when using EMR as a repair or filling material or an overlay in bridges' rehabilitation. However, the performances of epoxy concrete are different due to differential mix ratios; thus, the bonding properties between various epoxy resin concrete and cement concrete are not completely the same. This article investigated the interfacial bond properties between NSC and ERC by direct tensile, push-out, and slant shear test with specimens of special size and structure and observed the interfacial bond strength and corresponding failure modes. The minimum bond strength under direct tension was 0.72 MPa, while the minimum bond strength was 1.71 MPa and 3.19 MPa for the push-out test and slant shear test, respectively. Results indicated that the slant shear test specimens with an inclination angle of 45° are not suitable for the slant shear test due to higher compressive stress. Furthermore, the cohesion and friction coefficient of interface bond strength were calculated inversely in accordance with the results obtained from the corresponding direct tensile and slant shear tests. The minimum cohesion value was 1.71 MPa, and the minimum friction coefficient value was 0.46.
UR - http://www.scopus.com/inward/record.url?scp=85116692887&partnerID=8YFLogxK
U2 - 10.1155/2021/5561097
DO - 10.1155/2021/5561097
M3 - Article
AN - SCOPUS:85116692887
SN - 1687-8434
VL - 2021
JO - Advances in Materials Science and Engineering
JF - Advances in Materials Science and Engineering
M1 - 5561097
ER -