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WorksheetsQuizz CONCRETE Material and Methods
Total questions: 25
Worksheet time: 13mins
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
A concrete having bulk density between 5 kN/m3 to 18 kN/m3 can be name as
Lightweight Concrete
Coloured Concrete
Heavyweight concrete
No-fines concrete
The presence of moisture in the sand _____________ the volume of the sand.
Decreases
Increases
Shrink
Which component of concrete gives it desired compressive strength?
Cement
Aggregates
Sand
Water
Which parameter prevents the use of desert sand in concrete ?
The particle size
The price
Sand Temperature
The ecosystem
Concrete can be formulated with high tensile strength, but always has lower compressive strength
True
False
When 1 ton of cement is produced, how many CO2 is released ?
90 kg
750 kg
1380 kg
4000 kg
How does the addition of fly ash to concrete affect its strength?
It increases the strength
It decreases the strength
It has no effect on the strength
It makes the concrete more brittle
How much concrete was used in the construction of the Barakah nuclear power plant
20 000 cubic meter
60 000 cubic meter
140 000 cubic meter
200 000 cubic meter
How does temperature affect the setting time of concrete?
Higher temperature accelerates setting time
Lower temperature accelerates setting time
Temperature has no effect on setting time
Higher temperature slows down setting time
What is the difference between slump and air content in concrete?
Slump is a measure of density while air content is a measure of strength
Slump is a measure of strength, air content is a measure of workability
Slump is a measure of workability, air content is a measure of durability
What is the role of reinforcement in concrete?
To make the concrete more durable
To prevent cracking
To increase the strength of the concrete
All of the above
What is the difference between ready-mix concrete and precast concrete?
Precast concrete is only used for small projects.
Ready-mix concrete is mixed on site, precast concrete is mixed in a factory
Precast concrete is stronger than ready-mix concrete
Ready-mix concrete is more expensive than precast concrete
How does the size and shape of aggregate affect the strength of concrete?
Smaller aggregate results in stronger concrete
Angular aggregate results in stronger concrete
Larger aggregate results in stronger concrete
The shape of the aggregate has no effect on the strength
What is the role of formwork in concrete construction?
To shape the concrete
To hold the concrete in place while it sets
To protect the concrete from external factors
All of the above
Which of the following is a common pathology in concrete structures?
Wood rot
Mold growth
Corrosion of steel reinforcement
Pest infestation
