Which of the following types of joints is a temporary joint left between subsequent concreting operations?

Construction Joints in Concrete:

In concrete construction, different types of joints are used to manage the movement of concrete and ensure the integrity and durability of the structure. Each type of joint has a specific purpose, and the selection of the appropriate joint depends on the requirements of the construction project.

Explanation of the Correct Option:

• Option 3: Construction Joint
  • A construction joint is a temporary joint left between subsequent concreting operations. These joints are necessary when concrete cannot be placed in a single continuous operation. They allow for the continuation of concrete placement without compromising the structural integrity of the overall concrete element.
  • Construction joints are typically used at planned locations where concreting operations stop and will be resumed later. The joint is designed to ensure a good bond between the previously placed concrete and the new concrete, often incorporating specific details like keyed surfaces or additional reinforcement to maintain continuity and strength.
  • Proper treatment and preparation of the construction joint surface are crucial to ensure a good bond and prevent any potential weak points in the concrete structure.