Concrete is a mixture of two components: aggregates and:

• Earth

• Straw

• Paste

• Lime

How long does it typically take for concrete to cure?

• 24 h

• 7 days

• 28 days

• 93 days

How are aggregates categorized ?

• Size

• Shape

• Material

• Hardness

Which type of Cement is commonly used in the building sector ?

• Gypsum Cement

• Portland Cement

What is the role of water in concrete?

• To cool the concrete

• To make the concrete more pliable

• To make the concrete more brittle

• To activate the cement

What does the term "slump loss" refer to in concrete-making?

• when concrete falls out of the drum mixer on route to the building site

• when the concrete is too soft and slumps within the steel rods reinforcing

• When the concrete looses his compressive strength

• when concrete becomes less workable after a certain time has elapsed

How is concrete reinforced?

• With steel rods

• with steel meshs

• With steel rods and steel meshs

• with superplastifizer

What specifications are followed in civil engineering in the UK and Ireland ?

• ASTM

• Eurocodes

• BAEL

• NA DTR

What issues can cause exposure to cement dust?

• Silicosis

• Kidney disease

• All the answers are correct

The strength of well compacted concrete with good workability is depending only on the

• Water Content

• Cement Content

• Water soaked ratio

• Water Cement ratio