Establishment of a new approach to optimized selection of steel bridge deck waterproof bonding materials composite system

• Published in: Construction & building materials 2020-12, Vol.264, p.120269, Article 120269
• Main Authors: Ai, Changfa, Huang, Hengwei, Rahman, Ali, An, Shaoke
• Format: Article
• Language: English
• Subjects: Bridge deck pavement; Entropy weight-TOPSIS method; Evaluation; Image processing; Optimization; Waterproof adhesive system
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2020.120269

•Successful application of entropy weight-TOPSIS method for optimized selection of bonding materials.•Significant effects of temperature and bonding materials type on interfacial bonding.•Good adhesion properties of combined CILBOND®55 (55) / CILBOND®62 (62) materials. This paper aims to compare the bonding properties of different waterproof bonding material composite systems in bridge deck pavement and select the optimal one based on a newly developed method. To fulfill this objective, four kinds of waterproof bonding material composite system were designed, and test samples were fabricated. Then, direct tensile test, direct shear test and 45-degree skew shear test at different temperatures (0 °C, 25 °C, 70 °C) were conducted on specimens to evaluate their bonding strength. In the meantime, the fatigue life of composite specimens was tested at 25 °C. Considering five indexes of direct tensile strength, direct shear strength, skew shear strength, fatigue life, and materials cost, the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method based on the entropy weight was employed to select the optimal waterproof bonding material composite system. Finally, the image binarization was used to validate the results obtained by entropy weight-TOPSIS method. Findings showed that the results obtained from both image binarization and entropy weight-TOPSIS method are in good agreement, which verifies the validity of this method in the optimal design of the steel deck waterproof bonding material composite system.