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WorksheetsQuiz: Aggregates in Building Construction
Total questions: 30
Worksheet time: 15mins
What percentage of concrete volume typically consists of aggregates?
30–40%
45–55%
60–75%
80–90%
Fine aggregates are particles that are:
Greater than 4.75 mm
Less than 4.75 mm
Between 10–20 mm
Over 20 mm
Which of the following is an example of a manufactured aggregate?
River sand
Crushed stone
M-sand
Gravel
Recycled concrete aggregate (RCA) is produced from:
Natural sand
Demolished construction waste
Granite
Limestone
The main function of coarse aggregates is to:
Reduce water demand
Improve workability
Provide strength and load-bearing capacity
Increase setting time
Which aggregate type is most suitable for radiation shielding?
Lightweight aggregate
Heavyweight aggregate
Fine aggregate
Recycled aggregate
The main benefit of using well-graded aggregates is:
Increased water demand
Improved compaction and reduced cement use
Higher porosity
Lower strength
Angular aggregates generally provide:
High workability, low strength
Low workability, high strength
High porosity, low strength
Low porosity, high workability
The Impact Value Test measures:
Hardness
Water absorption
Toughness
Lightweight aggregates are often used for:
Road base
Precast blocks and insulation
Drainage layers
The specific gravity of most natural aggregates ranges between:
1.5 – 2.0
2.4 – 2.9
3.0 – 3.5
Which property primarily influences workability in concrete?
Aggregate size
Aggregate shape and texture
Aggregate color
Flaky and elongated aggregates tend to:
Improve workability
Increase density
Weaken the concrete
Which of the following tests measures resistance to wear?
Impact Value Test
Los Angeles Abrasion Test
Soundness Test
Which moisture condition represents the ideal state for batching concrete?
Oven dry
Air dry
Saturated surface dry (SSD)
Aggregates are chemically reactive materials that strengthen concrete.
True
False
Recycled aggregates help reduce construction waste and support sustainability.
True
False
Rounded aggregates generally provide higher strength than angular ones.
True
False
Heavyweight aggregates are mainly used for lightweight construction.
True
False
Poorly graded aggregates can cause segregation in concrete mixes.
True
False
Moisture in aggregates affects the water-cement ratio of concrete.
True
False
The higher the density of the aggregate, the weaker the concrete.
True
False
Angular aggregates reduce workability but improve bonding.
True
False
The Crushing Strength Test evaluates the aggregate’s ability to resist compression.
True
False
Lightweight aggregates improve thermal insulation.
True
False
Aggregate in the context of building materials is defined as:
A material such as sand, gravel, or crushed stone used with cement to form concrete or mortar.
A type of chemical additive used to speed up concrete setting.
A waterproofing agent applied to building surfaces.
A decorative coating for interior walls.
The two main functions of aggregates in concrete are:
To provide bulk and strength to the concrete and reduce shrinkage.
To increase the water content and decrease durability.
To make the concrete lighter and more flexible.
To accelerate the setting time and increase cost.
The difference between natural and manufactured aggregates is:
Natural aggregates are obtained from natural sources, while manufactured aggregates are produced by human processes.
Natural aggregates are always stronger than manufactured aggregates.
Manufactured aggregates are found in river beds, while natural aggregates are made from recycled materials.
There is no difference between natural and manufactured aggregates.
29. One test used to measure the strength of aggregates is:
Aggregate Crushing Value Test
Slump Test
Los Angeles Abrasion Test
Soundness Test
30. Aggregates that contain minerals reacting with cement alkalis can lead to which of the following outcomes?
Expansion and cracking of concrete
Increased strength of concrete
Faster setting time
Improved durability
