Joints in concrete pavements, Civil Engineering

Assignment Help:

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


Related Discussions:- Joints in concrete pavements

Key mechanism of defence by hot dip galvanizing, Question What is key m...

Question What is key mechanism of defence by hot dip galvanizing ? Answer Hot dip galvanizing protects steel or iron from corrosion by- (i) It figures a metallic z

Plumbing technology, This assessment will test Learning Outcomes 3 and 4 as...

This assessment will test Learning Outcomes 3 and 4 as well as the component of Learning Outcome 1 as it refers to waste disposal for the Plumbing Technology. The student is expect

LOADS, what are the difference between UDL and UVL?

what are the difference between UDL and UVL?

Strength of rivet joints, Ask question #Minimum 100 Please help me to...

Ask question #Minimum 100 Please help me to write a c program to determine strength and efficiency of single cover butt joint, lap joint, double cover butt joint . words ac

All semiconductors have how many electrons in their last orb, All semicondu...

All semiconductors have how many electrons in their last orbit? Answer: All semiconductors have  4 electrons.

Corrosion, Distinguish between dry and wet corrosion

Distinguish between dry and wet corrosion

Soil particles for geotechnical design, Question Will it worthwhile to ...

Question Will it worthwhile to take out tests on particle density of soil particles for geotechnical design? Answer Particle density of soils is definite by ratio of

Lorentz transfarmation, explain the concept of time dilation on the basis ...

explain the concept of time dilation on the basis of lorentz transfarmation equations

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd