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QuestionWhat are the key problems if use pumping for concreting works?
AnswerIn pumping operation, force exerted by pumps have to overcome friction involving concrete and pumping pipes, weight of concrete and pressure head when placing concrete above pumps. In actuality, as only water is pump able, it is water in concrete that transfers force. Major problems associated with pumping are effect of isolation and bleeding. To rectify these adverse effects proportion of cement is increased to improve cohesion sequentially to decrease segregation and bleeding. On other hand, the proper selection of aggregate grading helps to get better pump capability of concrete.
Q. Deformation Equation for settlement? When a load is applied on an elastic body, it results in strain. The summation of strain over a length is deformation or settlement. In
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construction of arches
Pavement Drainage: Water enters the pavement layers through cracks, joints and open spaces in the pavement surface. The water reaches the soil sub-grade on which the pavement
Q. Mechanism of plastic settlement in fresh concrete? Within a few hours after placing of fresh concrete, plastic concrete can experience cracking due to occurrence of plastic
Q. Pumping at joints in concrete carriageway? Pumping at joints in concrete carriageway takes place in the presence of the below factors: (i) Fine-grained subgrade (ii)
Q. How to design Marginal Embankments? Design aspects of marginal embankments are similar to those of approach banks. The aspects needing special attention are dealt with below
what are the feature of single flemish bond?
A sample of clay taken from a natural stratum was originated to be partially saturated and when tested in the laboratory gave the following results. Calculate the degree of saturat
Measurement quantity of excavation, concrete, formwork as my assignment brief.
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