Green Design Interview Questions and Answers

Yes, various tests are done on aggregates to ensure their quality and suitability for use in construction.

• Tests include sieve analysis, specific gravity, absorption, and abrasion resistance.

• These tests help determine the size distribution, density, water absorption, and durability of the aggregate.

• The results of these tests are used to ensure that the aggregate meets the required specifications for use in construction.

• ...read more

Nominal mix is a mix of fixed proportions of cement, sand, and aggregate. Design mix is a mix of specified proportions of cement, sand, and aggregate.

• Nominal mix is used for small construction projects where quality control is not a major concern.

• Design mix is used for large construction projects where quality control is important.

• Nominal mix has a fixed ratio of ingredients, usually 1:2:4 or 1:3:6.

• Design mix has a spe...read more

M30 is a grade of concrete used in construction.

• M30 refers to the compressive strength of concrete after 28 days of curing.

• It is commonly used in the construction of bridges, high-rise buildings, and heavy-duty industrial structures.

• M30 concrete has a mix ratio of 1:1:2 (cement:sand:aggregate).

Slump test is used to measure the consistency of fresh concrete before it sets.

• It measures the workability of concrete.

• It helps to determine the water-cement ratio.

• It is a simple and quick test that can be performed on-site.

• The test involves filling a slump cone with concrete and measuring the slump.

• The slump value indicates the amount of deformation or settling of the concrete.

• The test is used to ensure that the concr...read more

M20 design ratio is the ratio of the weight of cement to the weight of sand to the weight of coarse aggregates in concrete mix.

• M20 design ratio is commonly used in construction for concrete mix design.

• It specifies the proportions of cement, sand, and coarse aggregates in the mix.

• The design ratio for M20 is 1:1.5:3, which means 1 part cement, 1.5 parts sand, and 3 parts coarse aggregates by weight.

• This ratio ensures the...read more

M30 concrete is a type of concrete with a specified compressive strength of 30 megapascals (MPa).

• M30 concrete is commonly used in construction projects where high strength is required.

• The 'M' in M30 stands for 'mix' and the number represents the compressive strength in MPa.

• To achieve M30 concrete, the mix design typically includes a combination of cement, aggregates, and water.

• The proportions of the mix are determined ...read more

The critical zone is the area where a project's success or failure is determined, while the rest zone is the area where less critical tasks are performed.

• The critical zone is the most important part of a project, where key decisions and actions are taken.

• The rest zone is the area where less critical tasks are performed, such as administrative work or non-essential activities.

• In construction projects, the critical zone ...read more