Mahathi Infra Services Civil Site Engineer Interview Questions and Answers

Mix design is the process of determining the proportions of cement, water, aggregates, and admixtures to produce concrete of desired strength and durability.

• Grade of concrete refers to the strength of the concrete mix, which is determined by its compressive strength after 28 days of curing.

• Lab testing for concrete includes tests for compressive strength, slump, air content, and density.

• Mix design involves selecting the...read more

The question is related to the process of making level sheets using WMM, WBM, DBM, and BC.

• Level sheet making involves the use of different materials such as WMM, WBM, DBM, and BC.

• WMM stands for Wet Mix Macadam and is used as a base layer for roads.

• WBM stands for Water Bound Macadam and is used as a base layer for flexible pavements.

• DBM stands for Dense Bituminous Macadam and is used as a binder course layer for roads.

• B...read more

The weight of green concrete varies depending on the mix design and components used.

• The weight of green concrete typically ranges from 140 to 150 pounds per cubic foot.

• Factors such as the type and amount of aggregates, cement, water, and admixtures used can affect the weight.

• Lightweight concrete can have a lower weight, while high-density concrete can be heavier.

• The weight of green concrete is important for structural

The formula for tensile strength of concrete is based on the cross-sectional area and maximum load applied.

• Tensile Strength = Maximum Load / Cross-sectional Area

• The units for tensile strength are typically in MPa (megapascals)

• Tensile strength is an important property of concrete for determining its ability to resist tension forces

• For example, if a concrete specimen with a cross-sectional area of 100 square millimeters ...read more

The water cement ratio of concrete refers to the ratio of the weight of water to the weight of cement used in a concrete mix.

• The water cement ratio is a crucial factor in determining the strength and durability of concrete.

• A lower water cement ratio results in stronger and more durable concrete.

• The ideal water cement ratio varies depending on the type of concrete mix and its intended use.

• For example, a typical water ce...read more

IS code of steel refers to the Indian Standard code for steel materials and products.

• IS 2062:2011 - Steel for general structural purposes

• IS 1786:2008 - High strength deformed steel bars and wires for concrete reinforcement

• IS 8500:1991 - Structural steel - Microalloyed (medium and high strength qualities)