Concrete Lab Technician Interview Questions and Answers

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

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.