What term refers to the location where two successive placements of concrete meet?

The term that refers to the location where two successive placements of concrete meet is known as a construction joint. This type of joint is specifically designed to allow for the connection of two separate pours of concrete in a way that maintains the structural integrity and strength of the overall concrete mass.

Construction joints are essential in large concrete placements, as it is often impractical to pour all the concrete at one time due to factors like volume and the workability of the material. These joints are typically reinforced with steel bars to ensure continuity and support load transfer between the two separate pours. Properly executed construction joints also help manage potential issues related to shrinkage and cracking.

Other types of joints serve different purposes. For instance, contraction joints are installed to control cracking due to shrinkage, while isolation joints allow for movement between different structures or materials in a way that provides separation. Expansion joints accommodate the thermal expansion and contraction of concrete, providing space for these movements. Knowing the specific characteristics and applications of each type of joint is critical for ensuring the longevity and performance of concrete structures.