Joints in concrete pavements, Civil Engineering

Joints in Concrete Pavements:

Concrete pavements in India are of the jointed plain (unreinforced type). The following types of joints are needed in them :

(a) Transverse Contraction Joints

(b) Longitudinal Joints

(c) Expansion Joints

Transverse contractions are provided at 3.5-5.0 m spacing for relieving the tensile stress induced when the temperature of the concrete falls below the laying temperature. The modern practice is to lay the slab continuously and cut the transverse joints to a depth of 1/3rd the slab thickness by a joint cutting saw, and allow the crack to travel downwards in due course. A dowel bar is provided to transfer the load. For low volume roads, the dowel bars are omitted and the load transfer takes place by aggregate interlock. A sketch of a contraction joint is given in Figure. The joint is sealed with a sealant.

1853_Joints in Concrete Pavements.png

Figure: Contraction Joint

Longitudinal joints are provided on pavements which are wider than one lane to relieve warping stresses. They are also cut by joint cutting saws. Tie rods are provided to prevent the adjoining slabs from separating. The joints also need to be sealed. A sketch of a longitudinal joint is given in Figure.

1809_Joints in Concrete Pavements1.png

Figure: Expansion Joint

Expansion joints are provided to allow for the expansion of slabs. The current practice is to provide expansion joints only at culverts and bridges. A typical expansion joint is shown in Figure.

549_Joints in Concrete Pavements2.png

Figure: Longitudinal Joint with Tie Bar

Posted Date: 1/22/2013 4:56:03 AM | Location : United States







Related Discussions:- Joints in concrete pavements, Assignment Help, Ask Question on Joints in concrete pavements, Get Answer, Expert's Help, Joints in concrete pavements Discussions

Write discussion on Joints in concrete pavements
Your posts are moderated
Related Questions
Q. Acetylene gas cylinder for gas welding to be erected in upright position Acetylene gas is normally used for gas welding due to its simplicity in production and transportati

Define Sulphate Attack - underwater inspection of bridge? Cement contains a proportion of tricalcium aluminates, which takes part in the hydration process. These can react with

applying quadratics in civil engineering


Q. How to design banks? When approach banks are of medium height upto 3 m, the material may be homogeneous. For bigger heights zoned section with impervious core and pervious o

Question During piling works, normally founding levels of bored piles are definite by using total core recovery or rock quality designation (RQD). Are there any problems by

Question In assortment of dams in drainage channels, what are the main advantages of using rubber dams instead of steel-gate dams ? Answer Key Advantages of rubber d

Define Types of Inspection of Bridge? Underwater inspections are generally categorised into five types: - Inventory - Routine - Damage - In-depth - Interim

Under which situation shall engineers use jacking in agreement end only and from both ends in pre-stressing work?

The Passage of time is single reason. Buildings also collapse because of weak foundations. Earthquakes, hurricanes and other natural disasters can also damage the structure of the