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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.
Question Give reason that why are most marine piles circular in cross section? Answer As marine piles, there are a number of options existing for selection, name as H-
Question What are main dissimilarities in applications between pipe culverts and box culverts ? Answer Essentially, culvert resources covered hydraulic structure that conveys fl
Define Fatigue load test of shock transmission unit? This test was carried out for 100,000 cycles for maximum capacity of STU, assuming the worst case that the 'Lock Up Load' i
Problem (a) Briefly explain the concept of wind-driven ventilation and outlines its benefits over mechanical/electrical means of ventilation. (b) Various factors and guidel
Design volume of the aeration basin - sewer construction: Problem: What is the design volume of the aeration basin? Solution Assuming that 30% of the plant influe
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
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Los Angeles Abrasion Test: In which the aggregates are placed in a rotating drum in which a certain number of cast iron cylindrical balls are also placed, and the drum rotated
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