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

Explain the contracted rectangular weir, Explain the Contracted Rectangular...

Explain the Contracted Rectangular Weir Weir plate has sides which extend above the maximum water surface, directing the flow through an opening (b = weir length). Typically th

Quality of constraction material ., haw to control quality of constraction...

haw to control quality of constraction material and it''s stage of control, control management, quality of performance ,organization for control

Foundation, difference between piles and pier

difference between piles and pier

Explain the process of directed track maintenance, Q. Explain the process o...

Q. Explain the process of Directed Track Maintenance? DTM is a method to maintain the track is directed every day and not as a prescribed routine. DTM essentially consists of n

Quantity calculation for subgrade preparation, reparation of subgrade in sq...

reparation of subgrade in sqm for a road of span 12 km and width 5.25m,with shoulders of 0.75m span on both the sides...considering extrawidening too......plz help...i m preparing

What is the meaning of elastic shortening of concrete, What is the meaning ...

What is the meaning of Elastic Shortening of Concrete At the transfer stage, compressive prestressing force is transferred to the concrete. Due to this compressive force, concr

Stone, Explain briefly physical classifications of stone

Explain briefly physical classifications of stone

Finite elemenst, can you do finite elements using the weighted residual for...

can you do finite elements using the weighted residual formulation-galerkin method?

Determine the major role of construction, Determine the major role of const...

Determine the major role of construction A major part of civil engineering construction involves the use of cement concrete. Concrete has a good compressive strength and works

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