In Concrete Construction, What Is a Cold Joint?

Cold joint is improper construction. During the construction process, for some reason, the pre-concrete has been initially set, and the post-concrete continues to be poured, so that a weak joint surface appears at the front and rear concrete links.

Cold stitch

Right!

Cold joint is improper construction. During the construction process, for some reason, the pre-concrete has been initially set, and the post-concrete continues to be poured, so that a weak joint surface appears at the front and rear concrete links.

What is the difference between cold joints and construction joints in construction projects?

Cold joints refer to construction quality joints formed when the time interval between the top and bottom layers of concrete exceeds the initial setting time.

Construction joint refers to a joint between new and old concrete that is "intentionally" produced due to construction process, construction strength, and concrete temperature control measures. Construction joints need to be treated with chiseling, reinforcement, and waterstop .

The biggest difference between the two is that the former is improper construction and the latter is construction needs.