pc lecture 1

Question 1

Obtained a patent for the manufacture of Portland cement

Answer 1

Aspdin J. in England (1824)

Question 2

introduced steel wires in concrete to make flowerpots, pipes, arches and slabs.

Answer 2

Monier J. in France (1857)

Question 3

introduced the concept of tightening steel rods in artificial stone
and concrete arches.

Answer 3

Jackson P.H. of USA (1886)

Question 4

manufactured concrete slabs and small beams with embedded tensioned steel.

Answer 4

Doehring C.E.W. of Germany (1888)

Question 5

Recognized the losses due to shrinkage and creep.

Answer 5

Stainer C.R of USA (1908)

Question 6

Developed a method of winding and pre-tensioning high
tensile steel wires around concrete pipes

Answer 6

Emperger F. of Austria (1923)

Question 7

Hoop-stressed horizontal reinforcement around walls of concrete
tanks through the use of turnbuckles

Answer 7

Hewett, W.H of USA (1924)

Question 8

Used high strength unbonded steel rods

Answer 8

Dill, R,H of USA (1925)

Question 9

Used high tensile steel wires. ultimate strength as high as 1725 MPa, yield stress over 1240 MPa

Answer 9

Eugene Freyssinet of France (1926)

Question 10

He developed conical wedges for end anchorages of post-tensioning and
developed double-acting jacks.

Answer 10

Eugene Freyssinet of France (1939)

Question 11

Father of prestressed concrete.

Answer 11

Eugene Freyssinet

Question 12

Developed the long-line pre-tensioning method.

Answer 12

Hoyer, E. of Germany (1938)

Question 13

Developed an anchoring system for post-tensioning using
flat wedges.

Answer 13

Magnel, G. of Belgium (1940)

Question 14

Built numerous prestressed concrete bridges
in western and central Europe.

Answer 14

Guyon, Y. of France

Question 15

Introduced the concept of partial prestressing.

Answer 15

Abeles, P.W in England

Question 16

In Europe, the application of prestressing
the concrete bridges became popular during

Answer 16

1940s and 1950s

Question 17

Very famous in the field of prestressed concrete

Answer 17

Leonhardt F. in Germany, Mikhailor V. in Russia and Lin T.Y in USA

Question 18

Was being applied in various types of structures like building frames,
parking structures, stadiums, railway sleepers, transmission line poles, water tanks and
several other types of elements.

Answer 18

Prestressed concrete

Question 19

Example of the use of prestressed concrete
girders.

Answer 19

Pamban Road Bridge, India

Question 20

Is the application of
an initial load on a structure, to enable it to counteract the stresses arising from
subsequent loads during its service period.

Answer 20

Prestressing

Question 21

Two such examples of prestressing

Answer 21

1. Force-fitting of metal bands on wooden barrels
2. Pre-tensioning of the spokes in a bicycle wheel

Question 22

Concrete’s tensile strength is only

Answer 22

8 to 14 percent of its compressive strength

Question 23

Prestressing enhances

Answer 23

Bending, shear, torsional capacities of the flexural members

Question 24

In cylindrical tanks, the hoop tensile
stress can be effectively counteracted by

Answer 24

Circular prestressing

Question 25

Prestressing of structures was introduced in

Answer 25

late nineteenth century

Question 26

Under sustained load, the strain in concrete increases with increase in time.

Answer 26

Creep strain

Question 27

FIP stands for?

Answer 27

International Federation for Prestressing (1952) Europe

Question 28

PCI stands for?

Answer 28

Precast/Prestressed Concrete Institute
(1954) USA