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

Concrete surround for drainage pipes, Concrete surround is generally adopte...

Concrete surround is generally adopted for rigid drainage pipes to resist high traffic loads (for instance under shallow covers) and to allow for using pipes with lower strength. F

Vitrification, what is this process?whats its procedure?need some case stud...

what is this process?whats its procedure?need some case studies

Poly tetra fluoro ethylene, Question Why Poly tetra fluoro ethylene (PTFE...

Question Why Poly tetra fluoro ethylene (PTFE) is usually used in sliding bearings? Answer The choice of sliding surface of bearings is of very important importance since slid

Coatings at the back faces of abutments, Q. Coatings at the back faces of a...

Q. Coatings at the back faces of abutments? There are many views on the necessity of application of protective coatings (can be in the form of two coats of paint) to the back f

Shear force, Shear distribution for I section

Shear distribution for I section

Define reactivity - hazardous waste, Define Reactivity - Hazardous Waste ...

Define Reactivity - Hazardous Waste - Undergoes violent Change w/o detonating - reacts violently with water - Forms potentially explosive mixtures with water - generat

Estimating movement for movement joints, Question Should reversible moi...

Question Should reversible moisture movement be taken into account in estimating movement for movement joints ? Answer Size of concrete is affected by changes in dist

Shear stress distribution on sections, is shear stress distribution on I an...

is shear stress distribution on I and T sections are same????

Calculate roller production, Calculate Roller Production An excavating ...

Calculate Roller Production An excavating contractor determined through a test strip, that a smooth steel-wheel vibrating roller compactor operating at 3-mph can compact a 6-in

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