Ashapura Volclay Interview Questions and Answers

Effective cover in column, beam, slab, waist slab, and footing is the minimum thickness of concrete provided to protect the steel reinforcement from corrosion.

• Effective cover is determined based on the exposure conditions and the type of structure.

• For columns and beams, the effective cover is typically 40mm to 50mm.

• For slabs, the effective cover is typically 20mm to 30mm.

• For waist slabs, the effective cover is typically 25mm to 30mm.

• For footings, the effective cover is typica...read more

Lap length is the amount of overlap between two reinforcing bars in concrete construction.

• Lap length is important for ensuring the strength and stability of reinforced concrete structures.

• It is necessary to provide sufficient lap length to allow for the transfer of stresses between the bars.

• The length of the lap depends on factors such as the diameter of the bars, the type of structure, and the design requirements.

• For example, in a beam, the lap length may be specified as 40 ...read more

BBS stands for Bar Bending Schedule. One way slab is supported on two opposite sides only, while two way slab is supported on all four sides.

• BBS is a detailed list of reinforcement bars in a structure

• One way slab is supported on two opposite sides only

• Two way slab is supported on all four sides

The first bar to be spaced in two-way slab is the shorter span bar. The bars used in two-way slabs are main bars and distribution bars.

• The shorter span bar is spaced first in two-way slab

• Main bars and distribution bars are used in two-way slabs

• Main bars are placed in both directions and are spaced at closer intervals

• Distribution bars are placed perpendicular to main bars and are spaced at wider intervals

Unit weight of 12mm diameter bar is calculated using the formula: Unit weight = (d^2/162) kg/m, where d is the diameter of the bar in mm.

• Calculate the cross-sectional area of the bar using the formula: Area = π*(d^2)/4

• Convert the diameter from mm to m by dividing by 1000

• Calculate the unit weight using the formula: Unit weight = (Area * length) * density

• For example, for a 12mm diameter bar with a length of 1m and density of 7850 kg/m^3, the unit weight would be calculated as: ...read more

Slump test is a method to measure the workability of concrete by determining the consistency and stiffness of the mix.

• Involves filling a cone-shaped mold with concrete, then lifting the mold to see how much the concrete slumps or settles

• Helps determine if the concrete mix is suitable for the construction project

• Results can indicate if more water or additives are needed to adjust the mix

• Commonly used in construction industry for quality control and assurance

Cube test is a method used to determine the compressive strength of concrete by testing cubes of concrete in a laboratory.

• Cube test involves casting cubes of concrete and curing them for a specified period of time.

• The cubes are then tested in a compression testing machine to determine the maximum load they can withstand before failure.

• The compressive strength of the concrete is calculated based on the maximum load applied and the cross-sectional area of the cube.

• Cube tests ar...read more