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

Theory of elasticity and plasticity, derivation for strain energy stored in...

derivation for strain energy stored in a body due to torsion

Define seal wear test of shock transmission unit, Define Seal wear test of ...

Define Seal wear test of shock transmission unit? Seal wear test: Seal prevents the leakage of silicon putty in the cylinder. The test is conducted for 30000 cycles assuming th

Project, Can I get an online project to work on in civil engineering??

Can I get an online project to work on in civil engineering??

What is main purpose of swabbing, Question After construction of waterm...

Question After construction of watermain, earlier to hydrostatic pressure test , swabbing is approved out. What is main purpose of swabbing ? Answer Pipelines ha

State the term - stresses from concrete to reinforcement, State the term - ...

State the term - Stresses from concrete to reinforcement Stresses from concrete to reinforcement, or vice-versa, in reinforced concrete are transferred due to bond between conc

Explain the selected bridges - underwater inspection, Explain the Selected ...

Explain the Selected Bridges - Underwater Inspection? Those bridges, which require underwater inspection must be noted for individual inspection and inventory records as well b

Scheming thermal reinforcement, Question What is importance of critical...

Question What is importance of critical steel ratio in scheming thermal reinforcement ? Answer Execution of critical steel ratio resources that in construction joints,

Levelling, principles of levelling

principles of levelling

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