MIDTERM EXAM CMT

What is concrete mix design?

• A mixture of cement and water

• A mixture of gravel and water

• A mixture of sand and water

• A mixture of cement, water, and aggregates

What is the main material that accounts for most of the concrete raw material cost?

• Cement

• Water

• Gravel

• Sand

It refers to any materials that will bind two or more non-adhesive substances together.

• Paste

• Gravel

• Sand

• Cement

What is the purpose of chemical admixture in concrete mix design?

• To add color to the concrete

• To improve workability and durability

• To reduce the cost of the concrete

• To increase the weight of the concrete

What is the composition of Class 'A' concrete mix?

• 1 part cement, 1.5 parts sand, 3 parts gravel

• 1 part cement, 2.5 parts sand, 5 parts gravel

• 1 part cement, 3 parts sand, 6 parts gravel

• 1 part cement, 2 parts sand, 4 parts gravel

What is the role of concrete mix design?

• To make the concrete transparent

• To make the concrete colorful

• To make the concrete heavy

• To come up with the most economical concrete mixture

How are materials in concrete mix usually combined?

• By blending them

• By freezing them

• By weighing and combining

• By heating them

It determines the freshness of cement and the moisture content accumulated and present in the cement cause by free hydration and carbonation of cement.

• Insoluble Residue

• SULFUR TRIOXIDE

• Loss on Ignition

• MAGNESIUM OXIDE

To determine the inert materials present in cement.

• Insoluble Residue

• SULFUR TRIOXIDE

• Loss on Ignition

• MAGNESIUM OXIDE

It affects the strength and setting time of cement.

• Insoluble Residue

• SULFUR TRIOXIDE

• Loss on Ignition

• MAGNESIUM OXIDE