St.Joseph's Institute Of Technology Diploma Civil Engineer Interview Questions, Process, and Tips

The quantity of cement, sand, and coarse aggregate required for M25 design mix concrete depends on the mix ratio.

• The mix ratio for M25 design mix concrete is 1:1:2 (cement:sand:coarse aggregate).

• To calculate the quantity of cement, multiply the volume of concrete by the ratio of cement in the mix.

• To calculate the quantity of sand, multiply the volume of concrete by the ratio of sand in the mix.

• To calculate the quantity...read more

1 m = 1000 mm

• 1 meter is equal to 1000 millimeters

• mm is a smaller unit of length than m

• Conversion factor is 1000

1 cum cement requires 28.8 bags of cement.

• 1 cum of cement is equivalent to 1440 kg

• 1 bag of cement is equivalent to 50 kg

• Therefore, 1 cum of cement requires 28.8 bags of cement (1440 kg / 50 kg per bag)

1 cubic meter of sand weighs approximately 1,600 kg.

• The weight of sand varies depending on its density and moisture content.

• The density of sand ranges from 1,400 to 1,900 kg/m³.

• Assuming a density of 1,600 kg/m³, 1 cubic meter of sand would weigh 1,600 kg.

• To convert cubic meters to kilograms, multiply the volume by the density.

The grade of concrete for paving depends on the traffic load and weather conditions.

• The minimum grade of concrete for paving is M20.

• For heavy traffic areas, M30 or higher grade concrete is recommended.

• In areas with extreme weather conditions, air-entrained concrete is used to prevent cracking.

• The mix design of concrete should be optimized for durability and skid resistance.

• Proper curing and jointing techniques should b