Concrete Lab Technician

Concrete Lab Technician Interview Questions and Answers

Updated 1 Nov 2024

Q1. What are the types of cement used in concrete?

Ans.

Types of cement used in concrete include Portland cement, blended cement, and specialty cement.

  • Portland cement is the most common type used in concrete production

  • Blended cement is a mixture of Portland cement and other materials like fly ash or slag

  • Specialty cement includes rapid-hardening cement, low-heat cement, and sulfate-resistant cement

Q2. What is the tensile strength of concrete ?

Ans.

The tensile strength of concrete is the maximum amount of tensile stress that it can withstand before failing.

  • Tensile strength is typically much lower than compressive strength in concrete.

  • It is influenced by factors such as the water-cement ratio, aggregate type, and curing conditions.

  • For normal strength concrete, tensile strength is around 10% of compressive strength.

  • Reinforcing concrete with materials like steel rebar can significantly increase its tensile strength.

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