What is a longitudinal joint in concrete?

A longitudinal joint consists of a tie bar placed at the mid-depth of a concrete pavement and it is not intended for joint lateral movement. When uneven settlement occurs, the tie bars in longitudinal joints perform as hinges (Ministry of Transport (1955)) which allow for the settlement of concrete carriageway.

What is the function of longitudinal joints in concrete road pavements?

Longitudinal contraction joints are induced in concrete pavement to control the locations of cracks that might otherwise form due to the restraint of temperature- and moisture-related movements (i.e., shrinkage, thermal contraction, curling and warping).

Why do they put lines in concrete roads?

The main reason for those lines Jackie is for water drainage. Concrete, for all practical purposes, is a non-porous substance when it comes to rainstorms, so the groves help disperse some of the rainwater that is on the road and helps it dry out faster.

What are longitudinal joints?

A longitudinal joint is constructed when one lane of HMA is paved then the adjacent lane is paved next to this now cold joint. The joint formed can be along a free edge identified as unconfined or defined as confined when placed along a rigid edge such as another lane of pavement or concrete.

How would you construct longitudinal and transverse joint?

Longitudinal joints are placed parallel to the center line, and transverse joints are placed at right angles to the center line for the full width of the pavement. Understanding the use and function of the different types of joints is required in determining their placement.

Why longitudinal joints are provided in rigid pavement?

Warping joint: Warping joints are provided along the longitudinal direction to prevent warping of the concrete slab due to temperature and subgrade moisture variation.

What is longitudinal cracking pavement?

Longitudinal Cracking. Longitudinal cracks occur parallel to the centerline of the pavement. They can be caused by: a poorly constructed joint; shrinkage of the asphalt layer; cracks reflecting up from an underlying layer; and longitudinal segregation due to improper paver operation. These cracks are not load-related.