Structures with cold joints may have a shorter service life due to accelerated deterioration. Proper planning, adequate consolidation, and use of bonding agents can minimize the negative. This article takes a closer look at the key issues related to cold joint concrete. Cold. The cold concrete joint is formed (when there is a long delay – more than 30 minutes-) between the first and second concrete pours, this delay can obviously vary depending on the conditions. This discontinuity occurs because the older material has passed its initial setting time, preventing a true chemical bond with the fresh mix. Cold joints typically occur when fresh concrete meets hardened concrete (or partially set), creating a structural discontinuity that can lead to many issues, such as water infiltration, decreased structural strength, and bad aesthetics.
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