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Comparative Study of the Effects of Key Factors on Concrete-to-Concrete Bond Strength | ||
| Civil Engineering Infrastructures Journal | ||
| مقاله 12، دوره 57، شماره 1، شهریور 2024، صفحه 205-223 اصل مقاله (554.76 K) | ||
| نوع مقاله: Research Papers | ||
| شناسه دیجیتال (DOI): 10.22059/ceij.2023.353447.1903 | ||
| نویسندگان | ||
| Vahag Mack1؛ Reza Salehfard2؛ Asghar Habibnejad Korayem* 3 | ||
| 1M.Sc., School of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran. | ||
| 2Post-Doctoral Researcher, School of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran. | ||
| 3Associate Professor, School of Civil Engineering, Iran University of Science and Technology (IUST), Tehran, Iran. | ||
| چکیده | ||
| This study aims to investigate the effects of key parameters on the interfacial bond strength between two concrete members. Different types of overlay in terms of strength (normal-strength concrete, high-strength concrete), surface roughness, and adhesive type are considered as variable factors influencing the bond behavior. First, the surface roughness of the old concrete and the compressive strength of the concrete overlay are evaluated separately. Then among the specimens, the composite with the highest bond strength is chosen as the optimum concrete composite. After finding the optimum composite, epoxy adhesive and cellulose mortar are applied to the optimum sample, and its corresponding interfacial strength is evaluated by bi-surface shear and splitting tensile strength tests. The results showed that, as the compressive strength of new concrete and concrete roughness increases, the bond strength increases. The highest bond strength achieved in composites containing high-strength concrete is 23.37% higher than that of samples with normal-strength concrete. Moreover, the interfacial bond strength of composite with the wire-brushed surface is the highest among other treatment methods, due to the interlocking action it provides. The bond strength of concrete composites containing epoxy adhesive is ∼100-200% higher than that of samples without epoxy resin. However, the addition of cellulose mortar slightly reduces the adhesion resistance of the optimum sample. Therefore, it is anticipated that the use of high-strength concrete concomitant with wire-brushed surface treatment and epoxy resin adhesive shows substantial potential as an excellent method for repair of concrete structure. | ||
| کلیدواژهها | ||
| Adhesive Agent؛ Concrete Repair؛ High-Strength-Concrete؛ Interfacial Strength؛ Surface Preparation | ||
| مراجع | ||
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