Characteristics of cold joints

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Key characteristics of cold joints include: They are unplanned and unintentional, often caused by interruptions or delays in the concrete pouring process. The delayed placement prevents full integration and knitting between the concrete batches and might lead to reduced structural robustness, increased. A cold joint in concrete construction is a plane of weakness that forms when new, wet concrete is poured against concrete that has already begun to harden. This discontinuity occurs because the older material has passed its initial setting time, preventing a true chemical bond with the fresh mix.

Cold Joints | Concrete Society

Cold joints, unlike cracks that form in hardened concrete through tensile restraint, are not gaps in the concrete but merely seams containing no appreciable void structure.

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