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

Define deferred maintenance- underwater inspection of bridge, Define Deferr...

Define Deferred maintenance - underwater inspection of bridge? Many problems of the substructure can be traced to lack of any maintenance in time, which again can be due to lac

What do you understand by pressure line, What do you understand by Pressure...

What do you understand by Pressure line If we determine the locations of resultant force at various sections of a pre-stressed beam, as in Example, we can draw a curve showing

What is dead weight, Dead weight Dead loads are the weight of perma...

Dead weight Dead loads are the weight of permanent components of the structures such as the weight of the elements and spheres, casing weight, weight of the false ceiling a

REQUIREMENT OF GOOD BUILDING STONE, HOW TO MAKE A GOOD BUILDING .? TELL ABO...

HOW TO MAKE A GOOD BUILDING .? TELL ABOUT SOME TIPS OF REQUIREMENT OF GOOD BUILDING STONE? AND SAY ABOUT CEMENT?

Method to calculate the loss of prestress, Method to calculate the loss of ...

Method to calculate the loss of prestress When the consider creep in regard to loss of prestress, we have to see that the prestressed member is under compressive stresses due

Define water jets for underwater inspection of bridge, Define Water jets fo...

Define Water jets for underwater inspection of bridge? These tools are widely used and produce a bright metal finish in one operation. Grit entrainment is available and makes t

Show ph value of water, Q. PH Value of Water? It is a symbol for hydrog...

Q. PH Value of Water? It is a symbol for hydrogen ion concentration and indicates acidity or alkalinity. When P H Value more than 7 water is alkaline and less than 7 water is a

Float or slack of an activity is positive or negetive, 1. What take place w...

1. What take place when float or slack of an activity is positive Ans: It represents a situation where extra resources are available and the completion of the project is not de

Define the hazard ranking system (hrs), Define the Hazard Ranking system (H...

Define the Hazard Ranking system (HRS) - A procedure for ranking uncontrolled hazardous waste sites in terms of the potential threat based upon the containment of the route of

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