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M in M20 refers to the mix ratio of cement, sand and aggregate in concrete.
M20 is a mix ratio of 1:1.5:3, which means 1 part cement, 1.5 parts sand and 3 parts aggregate are used in making concrete.
The letter 'M' stands for 'mix', and the number after it denotes the compressive strength of the concrete in megapascals (MPa) after 28 days of curing.
The mix ratio and compressive strength of concrete vary depending on the ...
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I applied via Referral and was interviewed before Mar 2023. There was 1 interview round.
I was interviewed in Jun 2024.
Types of cement include Portland cement, white cement, rapid hardening cement, and low heat cement.
Portland cement is the most common type used in construction.
White cement is used for architectural purposes.
Rapid hardening cement sets quickly and is used in projects with tight deadlines.
Low heat cement generates less heat during hydration and is used in large concrete structures.
Initial setting time is the time taken for the cement paste to harden sufficiently so that it can no longer be reshaped. Final setting time is the time taken for the cement paste to harden completely and attain its full strength.
Initial setting time is typically around 30 minutes to 1 hour after mixing with water.
Final setting time is usually around 2 to 4 hours after mixing with water.
Setting time can be affected by f...
posted on 10 Sep 2024
I applied via Recruitment Consulltant and was interviewed in Mar 2024. There was 1 interview round.
posted on 8 May 2022
I applied via Referral and was interviewed before May 2021. There were 3 interview rounds.
Aptitude test
Concrete testing involves evaluating properties such as compressive strength, workability, and durability.
Concrete mix design involves determining the optimal ratio of cement, water, and aggregates for a specific application.
Cement testing includes evaluating properties such as fineness, setting time, and strength.
Concrete properties such as compressive strength, workability, and durability can be tested using various ...
I applied via Naukri.com and was interviewed before Sep 2021. There were 2 interview rounds.
Electrical maintenance
posted on 26 Feb 2022
I applied via Approached by Company and was interviewed before Feb 2021. There were 2 interview rounds.
I applied via Referral and was interviewed before Mar 2023. There was 1 interview round.
I applied via Naukri.com and was interviewed before Aug 2022. There were 5 interview rounds.
Test was at average level. One having average knowledge on math, reasoning, English can clear the test.
Understanding tests and quantities of building materials for construction projects.
Tests of cement include compressive strength test, fineness test, and soundness test.
Tests of brick include water absorption test, compressive strength test, and efflorescence test.
Strength of various building materials can be determined through tests like tensile strength, compressive strength, and flexural strength.
Quantity of material...
I was interviewed in Jul 2022.
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