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

Explain the equation for length of spiral curve, Explain the Equation for L...

Explain the Equation for Length of Spiral Curve Length of Spiral Curve can be calculated using the following equation L s = 3.15V 3 /RC Where: V - Design Speed in MPH

Explain the angle of wall friction, A retaining wall 4.5 m high with vertic...

A retaining wall 4.5 m high with vertical back supports a backfill with horizontal surface. The unit weight of the fill is 18 kN/m 3 and the angle of internal friction is 36°. The

Calculate the number of trucks for fleet working, A contractor was awarded ...

A contractor was awarded a Contract to excavate and haul 200,000-yds 3 of silty clay (USCS classification ML) with a bulking factor of 30%.  The contractor's fleet of dump trucks

Determine the maximum pressure at the base of the wall, A masonry retaining...

A masonry retaining wall of trapezoidal section with the vertical face on the earth side is 1.5 m wide at the top and 3.5 m wide at the base and is 5.0 m high. It retains a sand fi

Surveying, Explain about reciprocal ranging

Explain about reciprocal ranging

Construction Planning, A contractor has both a 3-cy and a 5-cy shovel in th...

A contractor has both a 3-cy and a 5-cy shovel in the equipment fleet. Select the minimum size shovel that will excavate 450,000 bcy of common earth in a minimum of 120 working day

Cost-volume-profit and break even analysis, Cost-Volume-Profit and Break Ev...

Cost-Volume-Profit and Break Even Analysis: Cost-volume-profit analysis helps us to learn the behaviour of cost and profit in response to varying level of business activity. I

Ironmongery, fabrication methods of ironmongery

fabrication methods of ironmongery

What is long welded rail, Q. What is Long Welded Rail? Long Welded Rail...

Q. What is Long Welded Rail? Long Welded Rail is a welded rail the central part of which dose not under go any longitudinal movement due to temperature variation, normally a le

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