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CONCRETE – properties, uses and Types of Concrete

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Definition of Concrete Process of mixing broken Granite metal or broken bricks with mortar in correct proportion is called concrete.This granite broken metal or broken brick is called coarse aggregate. Jelly denotes coarse aggregates only. It diggers from fine aggregate.The mortar may be cement sand or lime sand which is mixed with concrete when rod … Read more

DRAWING INSTRUMENTS – ENGINEERING DRAWING

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DRAWING INSTRUMENTS The drawing instruments which are used to perform drawing work. The different types of drawing instruments mention below. DRAWING BOARD Along the left edge of the board, a groove is cut and a perfectly straight ebony edge called working edge, is inserted into the groove. The drawing board should be placed on the … Read more

Q.Design a RC rectangular beam simply supported over an effective span of 6 m to support an imposed load of 24 kN/m inclusive of its self weight. Use M 25 grade concrete and Fe 415 steel. Provide width of the beam equal to half of the depth. Use working stress method

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Q.Design a RC rectangular beam simply supported over an effective span of 6 m to support an imposed load of 24 kN/m inclusive of its self weight. Use M 25 grade concrete and Fe 415 steel. Provide width of the beam equal to half of the depth. Use working stress method SOLUTION: Effective span l … Read more

Q.Design a RC rectangular beam simply supported over an effective span of 5m to support an imposed load of 20 kN/m inclusive of its self weight. Adopt M 20 grade concrete and Fe 415 steel. Provide effective depth 1.5 times the width. Use Working stress method

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Q.Design a RC rectangular beam simply supported over an effective span of 5m to support an imposed load of 20 kN/m inclusive of its self weight. Adopt M 20 grade concrete and Fe 415 steel. Provide effective depth 1.5 times the width. Use Working stress method SOLUTION: Effective span l = 5m Working load  w … Read more

Design a rectangular R.C.C beam to resist a bending moment of 65 kN-m. Use M 20 grade concrete and Fe 415 steel. Assume b = 0.5d

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Q.Design a rectangular R.C.C beam to resist a bending moment of 65 kN-m. Use M 20 grade concrete and Fe 415 steel. Assume b = 0.5d SOLUTION: 1. PERMISSIBLE STRESSES σcbc =7N/mm ²                               σst = 230 N / mm ²  2. … Read more

Q. Design a R.C.C beam 230 mm wide to resist a bending moment of 30 kN-m. Use M 20 grade concrete and Fe 415 steel.

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Q. Design a R.C.C beam 230 mm wide to resist a bending moment of 30 kN-m. Use M 20 grade concrete and Fe 415 steel. SOLUTION: 1. PERMISSIBLE STRESSES σcbc =7N/mm ²                               σst = 230 N / mm ²  2. DESIGN … Read more

ANALYSIS OF SINGLY REINFORCED SECTIONS – Effective depth, neutral axis, Lever arm, moment of resistance and Types of sections

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ANALYSIS OF SINGLY REINFORCED SECTIONS  If the reinforced bars are provided only on tension side in the beam section, it is called as singly reinforced beams. Consider a simply supported beam subjected to bending under working loads. Since plane sections are assumed to remain plane after bending, strain is proportional to distance from the neutral … Read more

Q. If the equation of a velocity profile over a plate is V = 2 y2/3, in which ‘v’ is the velocity in mis at a distance of ‘y’ metres above the plate, Determine the shear stress at y = 0 and y = 0.075m (or) 7.5 сm.

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Q. If the equation of a velocity profile over a plate is V = 2 y2/3, in which ‘v’ is the velocity in mis at a distance of ‘y’ metres above the plate, Determine the shear stress at y = 0 and y = 0.075m (or) 7.5 сm. Given: µ = 0.835 N.S/m² SOLUTION: The … Read more

A plate 10 mm distant from a fixed plate moves at 2 m/s and requires a force of 300 N/m² to maintain this speed. Determine dynamic viscosity of the fluid between the plates,

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 Q. A plate 10 mm distant from a fixed plate moves at 2 m/s and requires a force of 300 N/m² to maintain this speed. Determine dynamic viscosity of the fluid between the plates, SOLUTION: Shear stress τ=μ * dv/dy τ = 300Nm^2 dv = change of velocity = 2m / s dy = distance … Read more

Q. A simply supported beam of span 6 m. Three concentrated load of 10 kN, 20 kN and 30 kN are acting at 2 m, 3 m and 5 m respectively from left hand support. Draw SFD and BMD.

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Q. A simply supported beam of span 6 m. Three concentrated load of 10 kN, 20 kN and 30 kN are acting at 2 m, 3 m and 5 m respectively from left hand support. Draw SFD and BMD. SOLUTION: Total load = 10 + 20 + 30 = 60kN To find the reactions Taking … Read more