G R Infraprojects Interview Questions, Process, and Tips

Flexible pavement and rigid pavement are two types of pavements used in different types of road projects.

• Flexible pavement is made of multiple layers of materials that can flex under traffic loads.

• Rigid pavement is made of a single layer of concrete or asphalt that is rigid and does not flex.

• New projects involve constructing roads from scratch, while realignment projects involve changing the alignment of existing roads...read more

The question describes the application of prime coat and tack coat on a WMM surface.

• Prime coat is a low viscous cut back bitumen used to fill up pores and voids on a WMM surface.

• Tack coat is a light application of bitumen, asphalt, emulsion, or dilute water applied on the prime coat.

• The purpose of the prime coat is to bond the WMM surface with the subsequent layers of asphalt.

• The tack coat helps in providing a strong b...read more

Design procedure for 150mm DLC thickness using M15 grade concrete with specific requirements for cement content, testing, mixing, transportation, compaction, and curing.

• Use M15 grade concrete with maximum aggregate cement ratio of 12:1

• Minimum cement content of 150kg per cum, or 120kg per cum if flyash is more than 20%

• Perform 5 sample cube test after 7 day curing with strength of 10 MPA, and 1 sample cube test after 7 d...read more

Design procedure for Senior Project Manager role including cement content, strength, joint design, and surface finishing.

• Minimum cement content of 360 kg per cum, or 310 kg per cum if fly ash is more than 20%

• Flexure strength of cement concrete after 28 days curing is 4.5 MPA

• Compressive strength of cement concrete after 28 days curing is 40 MPA

• Dowel bar provided for expansion joint vehicle load transfer between slabs

• Tie...read more

Cyclic loading in soil refers to repeated application of stress on soil over time, leading to changes in soil properties.

• Cyclic loading can cause soil to undergo changes in density, strength, and deformation characteristics.

• Examples of cyclic loading include traffic loads on roads, wave action on coastal soils, and seismic activity on earthquake-prone regions.

Liquefaction calculation involves determining the potential for soil to lose strength and behave like a liquid during an earthquake.

• Liquefaction occurs when loosely packed, water-saturated soils lose strength due to increased pore water pressure during seismic shaking.

• Calculations involve assessing factors such as soil type, density, saturation, and earthquake intensity to predict liquefaction potential.

• Methods like th...read more

Contracts domain is crucial for road sector development and management.

• Contracts ensure that all parties involved in road projects are clear about their roles and responsibilities.

• They help in setting project timelines, budgets, and quality standards.

• Contracts also provide a legal framework for dispute resolution and risk management.

• For example, a contract between a government and a construction company for building a ...read more

Prolongation claim refers to the additional time and cost incurred due to delays in project completion.

• Prolongation claims are common in construction contracts.

• There are two types of prolongation claims - compensable and non-compensable.

• Compensable prolongation claims are those where the contractor is entitled to additional time and cost due to delays caused by the owner or other parties.

• Non-compensable prolongation cl...read more