The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (where xu is the depth of neutral axis at the limit state of collapse)

Concrete Technology and Design of Concrete Structures
The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (where xu is the depth of neutral axis at the limit state of collapse)

0.367 xu

0.446 xu

0.416 xu

0.573 xu

0.367 xu

0.446 xu

0.416 xu

0.573 xu

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Concrete Technology and Design of Concrete Structures
In order to obtain the best workability of concrete, the preferred shape of aggregate is

angular

elongated

All of these

rounded

angular

elongated

All of these

rounded

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Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

reduces the strength

increases the strength

All of these

does not change the strength

reduces the strength

increases the strength

All of these

does not change the strength

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Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

only in pretensioned beams

in both post-tensioned and preten-sioned beams

only in post-tensioned beams

None of these

only in pretensioned beams

in both post-tensioned and preten-sioned beams

only in post-tensioned beams

None of these

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Concrete Technology and Design of Concrete Structures
The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

0.37 fy

0.67 fy

0.87 fy

0.57 fy

0.37 fy

0.67 fy

0.87 fy

0.57 fy

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Concrete Technology and Design of Concrete Structures
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

fcr

tcr – rcs = tct

fc5>fcr>fC

fcr>fcs>fc.

fcr

tcr – rcs = tct

fc5>fcr>fC

fcr>fcs>fc.

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Concrete Technology and Design of Concrete Structures

Concrete Technology and Design of Concrete Structures The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (where xu is the depth of neutral axis at the limit state of collapse)

Concrete Technology and Design of Concrete Structures In order to obtain the best workability of concrete, the preferred shape of aggregate is

Concrete Technology and Design of Concrete Structures Increase in the moisture content in concrete

Concrete Technology and Design of Concrete Structures Prestress loss due to friction occurs

Concrete Technology and Design of Concrete Structures The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

Concrete Technology and Design of Concrete Structures The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by

Concrete Technology and Design of Concrete Structures
The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (where xu is the depth of neutral axis at the limit state of collapse)

Concrete Technology and Design of Concrete Structures
In order to obtain the best workability of concrete, the preferred shape of aggregate is

Concrete Technology and Design of Concrete Structures
Increase in the moisture content in concrete

Concrete Technology and Design of Concrete Structures
Prestress loss due to friction occurs

Concrete Technology and Design of Concrete Structures
The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel)

Concrete Technology and Design of Concrete Structures
The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by