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The Influence Of Concrete Compressive Strength On Bonding Of Concrete Bundled Bars a) Department of Civil Engineering, Sekolah Tinggi Teknologi Garut, Jl. Mayor Syamsu 1, Garut, Indonesia Abstract Concrete has high compressive strength, and low tensile resistance. Placement of reinforcing steel in the tensile area is able to withstand the tensile forces that arise. One of the things that causes reinforcement and concrete to work together is bonding. Where the perfect attachment between the concrete and reinforcement produces a strain on the reinforcement is the same as the strain on the concrete around it. Reinforcement bundles as an alternative solution to the limitations of the cross-sectional dimensions are feasible to be developed. Research on the use of reinforcement bundles has not been done much. Experimental studies are needed to see the ability of the reinforcement bundle associated with the bonding stress produced by several parameters in the design of structural elements. Concrete strength as an important parameter in reinforced concrete is related to the use of reinforcement bundles needs to be examined. The design concrete strength 25 MPa, 30 MPa and 40 MPa with single bar and 2 bars steel bundles. Through the design mix that is carried out produces 27 MPa concrete compressive strength, 36 MPa and 39 MPa. The reinforcement steel tensile test produces 462 MPa yielding stress and 628 MPa ultimate stress. With the pull out test of the concrete cylindrical specimen diameter of 150 mm x 200 mm produces a variety of bonding stress values. Variations in the compressive strength of concrete in the reinforcement bundle did not appear to significantly influence the value of bonding stress. Only the visible increase in bonding stress increases with the strength of the concrete and the number of bars in the bundle. Keywords: Bundled Bars; Concrete Compressive Strength; Pull Out Test Topic: Civil Engineering |
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