Cement

When ... is added to cement and it begins to set.

• water
• powder
• concrete
• reinforcement

The most widely used cement-based material is 

• sand
• pebbles
• concrete
• gravel

Gravel is ...

• fine aggregate
• coarse aggregate
• plasticizer
• retarder

Sand is ...

• fine aggregate
• coarse aggregate
• reinforcement
• additive

1:2:4 mix consists of 

• 1 part of cement
• 2 parts of cement
• 3 parts of cement
• no cement

1:2:4 mix consists of ...

• 2 parts of water
• 2 parts of cement
• 2 parts of fine aggregates
• 2 parts of coarse aggregates

1:2:4 mix consists of ...

• 4 parts of water
• 4 parts of cement
• 4 parts of fine aggregates
• 4 parts of coarse aggregates

Retarder ...

• helps the concrete to set
• delays setting
• is a coarse aggregate
• is a fine aggregate

Reinforced concrete ...

• is weak
• contains steel bars
• has timber in it
• is cast in-sity

When water is added, the cement starts to become ...

• solid
• coarse
• fine
• soluble