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State the term - Post-tensioned concrete
In Post-tensioned concrete construction, as shown in Figure, tendons are placed inside concrete and stretched after concrete has attained sufficient strength. In this form of construction, ducts are made inside concrete with the help of tubes or pipes, which are provided in the forms at the time of casting of concrete. After sufficient hardening of concrete, tendons are placed in these ducts, stretched from both ends from outside with the help of jacks or other suitable devices and anchored at the ends of the concrete member. After the anchorage of tendons, tensile force of tendons is transferred to the concrete in the form 'of an equal compressive force. This compressive force, upto its capacity, reduces or eliminates the tensile stresses (produced due to external loads) in concrete.
Example for Productivity Analysis and Improvement An excavator with a bucket capacity of 3-yd 3 has a standard production rate of 2,160-yd 3 for an 8-hour day. The job site
Loss of Prestress due to Elastic Shortening of Concrete Due to elastic shortening of concrete, tendons are able to reduce their stretched length to the same extent upto which
A project engineer has ordered 100 hardwood boards, 1-1/4-in thick by 8-in wide and 8-ft long. The total board feet ordered is most nearly: Solution: 1.25" x 8" x 8' x 100
What quantity of cement will be needed to lay 2000 blocks of 9 inches using a mortar ratio of 1:6 with a thickness of 25mm in-between blocks.
the joists and sketches
Theories of Failure - cases of solids: Let us now consider the solid shown in Figure (b). (a) As the principal stresses are within 260 MPa, the solid is safe ac
reparation of subgrade in sqm for a road of span 12 km and width 5.25m,with shoulders of 0.75m span on both the sides...considering extrawidening too......plz help...i m preparing
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geometic design of streetsand highways
Impact Test: Resistance of stones to impact is found by conducting tests in impacting testing machine .It contain of a frame with guides in which a metal hammer weighing 13.
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