Increasing concrete cover beyond contractual, Civil Engineering

Assignment Help:

Question
If contractor suggests increasing concrete cover beyond contractual such as 40mm to 70mm shall engineers accept suggestion?

Answer
In contractual part, based on requirement of General Specification of Civil Engineering Works, tolerance of concrete cover is involving +5mm and -5mm and engineers must not believe sub-standard work as they do not possess an authority to change acceptance criteria. In that case where engineers think contractor suggestion acceptable in technical point of view, consent has to be required from employer regarding changes in receiving criteria.

From practical point of view, effect on cracking because of an enlarge in concrete cover have to be considered. In general, there are three major parameters which govern crack width, namely tensile damage at the point considered, distance of longitudinal bar to concerned point and depth of tension zone.

For second factor, as in proximity of longitudinal bars to point of part, closer a bar is to this point; smaller is crack width. So, closely spaced bars with smaller cover determination give narrower cracks than extensively spaced bars with larger cover. So, with an increase of concrete cover, crack width will add to that is undesirable.

 


Related Discussions:- Increasing concrete cover beyond contractual

Calculate the number of paths and critical paths, Calculate the Number of P...

Calculate the Number of Paths, Number of Critical Paths and Project Duration For the project network shown, the total number of paths through the network; number of critical pa

Define emerging trends in bearings, Define Emerging Trends in Bearings? ...

Define Emerging Trends in Bearings? New innovations have taken place in the area of bridge bearings, notable among them are: (1) Shock Transmission Unit (STU) or Lock Up Dev

Explain the permissible settlement, Q. Explain the Permissible Settlement? ...

Q. Explain the Permissible Settlement? Any foundation may fail in shear or by excessive settlement. The failure due to shear is checked by adopting safe value of bearing capa

Cost of utilities and taxes, The cost of utilities, taxes and maintenance o...

The cost of utilities, taxes and maintenance on a home is $3,000 per year.  The amount of money that would have to be invested now at 8% to cover these expenses for the next 5 year

Slope protection, what is the type of slope protection that use rocks and p...

what is the type of slope protection that use rocks and put cements between those rocks??the concept is same as brick layer

Show the filter below the revetment, Q. Show the filter below the revetment...

Q. Show the filter below the revetment? A filter placed between the revetment / protection works at the surface and the soil bed below the revetment / protection works. Main fu

WMM, GRADATION OF WMM

GRADATION OF WMM

Paints, painting wood work and steel

painting wood work and steel

Reinforcement in thrust blocks, Reinforcement in thrust blocks In gene...

Reinforcement in thrust blocks In general situation, reinforcement isn't essential for thrust blocks in pressurized pipelines. Though certain amount of reinforcement hasto be

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