Investigation of the Influence of Bonding Agents on the Shear Performance of Cold Jointed Concrete Surfaces

Authors : Kutalmış Recep Akça

Pages : 630-638

Doi:10.19113/sdufenbed.1766566

View : 34 | Download : 208

Publication Date : 2025-12-25

Article Type : Research Paper

Abstract :Cold joints arising from interrupted concrete casting can weaken interfaces and cause significant structural issues in reinforced concrete elements. In this study, the aim was to investigate the effectiveness of epoxy-based bonding agents and surface preparation in improving the shear resistance weakened due to cold joint formation. Within this scope, the use and non-use of bonding agents on concrete elements with rough and smooth surfaces were experimentally examined. The shear performance was determined using a double-sided shear test, and parameters such as shear strain, shear stiffness, and energy absorption capacity (toughness) were analyzed in light of the results obtained, in addition to shear strength. While surface roughness is an important factor in shear strength, the findings revealed that the use of bonding-agent is a more effective method for improving this strength. With the use of bonding-agent, increases of up to 192% in shear strength, 500% in shear stiffness, and 227% in total energy absorption capacity were achieved. The study concluded that the use of bonding agents provides significant benefits even on smooth surfaces, but that the effect is multiplied when applied in combination with surface roughness, and that this combination optimizes shear performance on concrete surfaces with cold joints.
Keywords : Soğuk Derz, Aderans Arttırıcı, Epoksi Katkı, Kayma Dayanımı, Yüzey Pürüzlülüğü, Çift Taraflı Kayma Deneyi

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