Already have an account? Get multiple benefits of using own account!
Login in your account..!
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
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.
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.
Figure: Longitudinal Joint with Tie Bar
#question why cracks develops on the surface of concrete on the next day of casting?
What is Partial Prestressing It is a form of prestressing in which tensile stresses are permitted, upto a limited extent, in concrete under working loads. As the permitted tens
cooke''s reversable level
what is plastic?its types and composition and its uses as engineering material
Determine about the pre-stressed concrete beam A pre-stressed concrete beam has a width of 200 mm and an overall depth of 400 mm. The permissible stresses in tension and compre
Question For a l ong slender structure similar to beams, propping is compulsory after elimination of formwork with reasons? Answer After concreting, time at which arresting of
Explain the Bridge Selection Criteria - Underwater inspection? Various factors influence the bridge selection criteria. As a minimum, all structures must receive routine underw
Multi Speed Restriction (i.e. existence of two or more than two speed restrictions in continuation) When work of deep screening or sleeper renewal is in progress, there is situ
Define Equipments required for conducting UWMT? Equipments required for conducting UWMT are: Inspection Equipment: a) Electronic yoke with power cable b) Ground fault interr
1. 130,000-yd 3 of banked soil from a borrow pit is stockpiled before being trucked to the jobsite. The soil has 18% swell and shrinkage of 8%. The final volume of the compacted
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