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Define Reinforcing Steel - Limitations of Ultrasonic System?
The sound velocity measurement taken parallel to the reinforcing bars embedded in the concrete will be markedly higher because sound velocity in steel is 1.2 to 1.9 times the velocity in concrete. The effect is small while the axis of the rebar is perpendicular to the direction of sound propagation and the correction factors are of the order of only 1 to 4% depending on the quality of concrete. It is, therefore, recommended that sound trans- mission paths should be chosen, based on available drawings that avoid the influence of the rebar. If drawings are not available, rebar-mapping equipments may be used to verify the presence and orientation of embedded rebars.
Q. Location of construction joints? Construction joints are generally required in construction works since there is limited supply of fresh concrete in concrete batching plants
Find the Youngs modulus of the rod: A composite rod is made by joining a copper rod end to end with a second rod of different material but of same cross-section. At 25oC, the
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Non-distortional Prestressing Concrete members deflect due to their own self weight. If prestressing force is applied in such a way that these deflections are eliminated due to
Explain the Frame member's effective lengths 1. Effective length is a product of an effective length factor (k) and the actual length of the column. 2. k depends on th
A wall with a smooth vertical back and 9 metres high retains a moist cohesionless soil with a horizontal surface. The soil weighs 15 kN/m3 and has an angle of internal friction of
definition
A pre- engineering base line was run down a very steep hill.rather than measure horizontaily down hill with steel tape: surveyor measured the vertical angle with the theodolite and
describe how quality control is maintained in a rolled fill dam
Compute the safe bearing capacity of a square footing 1.5 m × 1.5 m, located at a depth of 1 m below the ground level in a soil of average density 20 kN/m 3 . = 20°, N c = 17.7,
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