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

Defected Timber, Please tel me about Timber Defected

Please tel me about Timber Defected

3 wire leveling, can you give me some examples and problems in 3-wire level...

can you give me some examples and problems in 3-wire leveling?

Determine the cost of compensation, The soil in a borrow pit has a void rat...

The soil in a borrow pit has a void ratio of 0.90. A fill-in-place volume of 20,000 m 3 is to be constructed with an in-place dry density of 18.84 kN/m 3 . If the owner of borr

Joint filler in concrete expansion joints - a must, Joint filler in concret...

Joint filler in concrete expansion joints - a must?? Presence of joint filler is required to the proper functioning of concrete joints however some may doubt its value. For a c

Steel structures, how does battening differ from lacing?

how does battening differ from lacing?

Types of loads and resulting stresses, • Applied loads result in internal f...

• Applied loads result in internal forces consisting of a shear force (from the shear stress distribution) and a bending moment (from the normal stress distribution) • Bending s

#titl, Two readings ie 1.64m and 0.73m were taken during leveling procedure...

Two readings ie 1.64m and 0.73m were taken during leveling procedure to define the slope of a centerline of a bridge at points A and B. If distance AB=50 m, find the slope of line

Base isolation, why base isolation is not good for tall building

why base isolation is not good for tall building

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

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