Influence of Surface Textures on Shear Capacity of High Strength Concrete Interfaces
Prebhakumari K. S1, N. Ganesan2, Safeer A.3

1Prebhakumari K. S, Associate Professor, College of Engineering, Trivandrum India.
2Dr. N Ganesan, Professor, National Institute of Technology Calicut, Kozhikode (Kerala), India.
3Safeer A, Junior Structural Engineer Europostech, (Kerala), India. India.

Manuscript received on 10 December 2017 | Revised Manuscript received on 18 December 2017 | Manuscript Published on 30 December 2017 | PP: 5-9 | Volume-7 Issue-2, December 2017 | Retrieval Number: B5226127217/17©BEIESP
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Abstract: Construction joints cannot be avoided in any type of construction when the size of a structure is too large or construction is carried out in stage-by-stage. As construction is made on stages, joints between concretes is formed and these interfacial joints play a major role in overall efficiency of the structural system which take part in transferring loads and stresses from one section to other section. Shear stress transfer mechanism between two concrete layers is a complex phenomenon. Several parameters like roughness of interfaces, dowel action due to aggregates used, compression resistance of weaker concrete and reinforcement crossing the interface influence the shear transfer mechanism. Performance of the joints should be studied since the sections connected by the joints may be of different properties. Concrete layers having difference in aggregate types, cement content and water cement ratio should be analyzed for interface shear. This paper reports tests in which direct shear forces are applied across the High Strength Concrete joints between concretes forming a composite action. Push-off specimens are used for experimental study. Specimens were cast with Manufactured sand (M sand) and river sand as fine aggregates. Surface textures are varied by imparting smoothness and roughness at interface and shear transfer mechanism is studied. Also effect of variation in shear transfer capacity due to fine aggregates used at interface is studied
Keywords: Construction joints, Dowel action, High Strength Concrete, Push-off, Shear transfer.

Scope of the Article: Concrete Engineering