Types of joints in rigid pavement

Types of joints in rigid pavement

1. Types of Joints in Rigid Pavement Pavement Design Bhavya S. Jaiswal Btech civil, Mtech Transportation Engineering

2. Introduction 2 Load transfer is done by slab action. Rigid pavement has a significant flexural strength because it behaves like a slab. Presence of various joint is observed. Design is based on elastic theory. High initial cost and low maintenance cost. IRC-58:2012 CC pavement Base Course Sub Grade Prepared by: Bhavya S. Jaiswal

3. Types of joints in rigid pavement 3 Majorly the joints in the rigid pavement can be categorized in two categories according to the provision of the joint Joints in rigid pavement Longitudinal joints Transverse joints Such joints are parallel to the flow of the traffic Such joints are Perpendicular to the traffic flow Construction joints Contraction joints Expansion joints Prepared by: Bhavya S. Jaiswal

4. Longitudinal joints 4 Provided along the length of the rigid pavement and are parallel to the flow of the traffic In the rigid pavement, shrinkage cracks are generally formed when the length or width of the slab exceed 4.5m to 5m. Hence, longitudinal joints are provided whose spacing is depended on the width of the lane. That means if the width of the lane is 3.75m than the spacing of the longitudinal joint is also 3.75m Prepared by: Bhavya S. Jaiswal

5. Transverse joints 5 1 .Construction Joints, 2 .Contraction joints, 3 .Expansion Joints Prepared by: Bhavya S. Jaiswal

6. 1.Construction Joints 6 These joints indicate the discontinuity in the rigid pavement. These joints are placed in a pavement to define the extent of the individual placements. Construction joints must be designed to allow displacement between both sides of the pavement slab and at the same time they must transfer flexural stresses produced in the pavement slab due to vehicular loading. Prepared by: Bhavya S. Jaiswal

7. 2.Contraction joints 7 Such joints are purposely made weak planes which relive the tensile stresses in the concrete, caused due to shrinkage and also provided to prevent the formation of irregular cracks due to contraction/shrinkage of the concrete. Spacing of contraction joints depends upon the type of coarse aggregate used in the construction and the average temperature fluctuation in various climate change. Prepared by: Bhavya S. Jaiswal

8. 3.Expansion Joints 8 In the rigid pavement, expansion joints are provided to allow the expansion of the concrete due to rise in the temperature. The space kept as an expansion joint get clogged due to dirt and other incompressible materials which causes failure of the expansion joints and the concrete can not have the expansion. Prepared by: Bhavya S. Jaiswal