Dalmia Bharat Cement Technical Support Engineer Interview Questions and Answers

Cement is a binding material used in construction. It is available in different grades and undergoes various tests.

• Cement is a fine powder made from limestone and clay

• Grades of cement include OPC, PPC, and PSC

• Tests for cement include compressive strength, setting time, and soundness

• Concrete is made by mixing cement, sand, and aggregate

• Good quality materials for construction include high-grade cement, clean sand, and durable aggregate

• Ratios and proportions for concrete mix dep...read more

The specification of cement, sand, and aggregate refers to the ratio of these materials used in concrete mixtures.

• The specification is usually expressed as a ratio of the materials used in the mixture.

• For example, a common specification for concrete is 1:2:3, which means one part cement, two parts sand, and three parts aggregate.

• The specification can vary depending on the intended use of the concrete, such as for foundations, walls, or pavements.

• The specification also takes i...read more

Various tests are conducted to ensure the quality of cement and concrete.

• Compressive strength test

• Water absorption test

• Setting time test

• Soundness test

• Fineness test

• Chemical analysis test

• Bulk density test

• Air content test

• Slump test

• Flexural strength test

Soundness of cement refers to its ability to resist volume changes after setting.

• Soundness is important for durability and strength of concrete structures.

• It is measured by the Le-Chatelier test or the Autoclave test.

• If the cement expands or contracts excessively, it can cause cracking and weaken the structure.

• Factors affecting soundness include the composition of raw materials, fineness of grinding, and curing conditions.

Types of complaints in cement industry include quality issues, delivery delays, and pricing disputes.

• Quality issues such as inconsistency in strength or setting time

• Delivery delays causing project delays

• Pricing disputes over invoicing or contract terms