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

Calculate the deposited amount - construction management, An engineer depos...

An engineer deposits an "X" amount every 6 months for 3 years so that she'll have $10,000 at the end of this period. The interest rate is 5% per year which is rebalanced every 6-mo

Regression, I would like to ask what is regression and its function?

I would like to ask what is regression and its function?

Preparation for underwater inspection - tool and equipment, Preparation for...

Preparation for Underwater Inspection - Availability of Tools and Equipment The engineer-in-charge, before taking up the inspection, should list out the complete equipment req

Explain the critical depth, Explain the Critical Depth d c is the dept...

Explain the Critical Depth d c is the depth of flow in an open channel that has the lowest energy.  In rectangular open channels:  (d c ) 3 = Q 2 /g(w) 2 In nonrectang

Explain the coefficient of permeability, A sand deposit of 12 m thick overl...

A sand deposit of 12 m thick overlies a clay layer. The water table is 3 m below the ground surface. In a field permeability pump-out test, the water is pumped out at a rate of 540

Projects, GIS AND REMOTE SENSING

GIS AND REMOTE SENSING

Softening point of bitumen, Hi, i need discussion for softening point of bi...

Hi, i need discussion for softening point of bitumen 7.5 ?C

Determine about the statement - failure at cracking load, Determine about t...

Determine about the statement - Failure at Cracking Load This brittle mode of failure is likely to occur in those pre-stressed elements that are concentrically pre-stressed wit

Tools of measerments, where i can get the tools of different types of mease...

where i can get the tools of different types of measerments of differents elements of construction?

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