Concrete and Flatwork Review

Which of the following is NOT listed as an application of concrete in the image?

• Foundations

• Sidewalks

• Roofs

• Decorative elements

Which of the following is NOT a characteristic of concrete?

• Easy to make with local building materials

• Requires high maintenance

• Resistant to corrosive chemicals

• Fire resistant

What enhances the tensile strength of concrete?

• Local building materials

• Reinforcement

• Corrosive chemicals

• Fire resistance

Concrete is known for its:

• Poor compressive strength

• Great compressive strength

• High cost

• Low durability

What is concrete made of?

• Wood, metal, and glass

• Portland cement, aggregates, and water

• Plastic, rubber, and resin

• Steel, bricks, and mortar

What is Portland cement made from?

• Sand and water

• Limestone and clay

• Gypsum and shale

• Granite and marble

How does the hardening of Portland cement occur?

• Through a cooling process

• Due to an exothermic reaction

• By absorbing moisture from the air

• Through a photosynthesis reaction

What is hydration in the context of forming concrete?

• The process of drying out concrete

• The exothermic chemical reaction of water combining with Portland cement

• The cooling down of concrete after it has set

• The application of water to cure concrete

What happens during the first phase of concrete formation?

• Water is removed from Portland cement

• Water is added to Portland cement for initial reaction

• Secondary hydration reaction occurs

• The concrete is left to dry and harden

What is the purpose of the second phase in the concrete formation process?

• To allow the concrete to set and harden

• To mix and haul the concrete

• To initiate the chemical reaction with water

• To form strong bonds around the aggregate