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QuestionIf contractor suggests increasing concrete cover beyond contractual such as 40mm to 70mm shall engineers accept suggestion? AnswerIn 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.
If y1 and y2 are alternate depths of a rectangular channel show that Yc³ =2y1²y2²/(y1+y2) Also specific energy E = y1²+y1y2+y2²/(y1+y2)
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Question Is kerb necessary in road pavements? Answer In universal, kerbs are crucial in road pavements due to next cause- (i) They supply strength to sides of road
Hi, i really need help to done my assignment i have done some part but in that case i need professional advice to finish my task. could you please let me know if you can help me. t
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Loss of prestress due to relaxation of steel Relaxation of steel represents the time dependent reduction of stresses in steel even when the strain remains constant. In a way i
Cumulative distribution function - Poisson distribution: Find the cdf of Y = X 1 , + X 2 where X I and X 2 independently follow Poisson distribution with parameters λ l an
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