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

Alum, Aalumsk question #Minimum 100 words accepted#

Aalumsk question #Minimum 100 words accepted#

Large catchments in estimating peak runoff, Question Is it true that ra...

Question Is it true that rational process has to not be used for large catchments in estimating peak runoff ? Answer Rational process is appropriate for small catchme

Structural drawing, Overview   A structure is required to support a conv...

Overview   A structure is required to support a conveyor and various ancillary equipment, between two buildings in an industrial area. It is 12m long and made up of structural s

Total station - uses and mining, Total station - uses and mining: Use...

Total station - uses and mining: Uses:- Total stations are mainly used by land surveyors and Civil Engineers, either to record features as in Topographic Surveying or to

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

Finite Element Method formulation, 1. [6 marks] Treating the bar illustrate...

1. [6 marks] Treating the bar illustrated above as being a one dimensional axial bar where plane sections remain plane and parallel, analyse the bar using the Galerkin finite eleme

Offset survey, what is offset survey and how it is done

what is offset survey and how it is done

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

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