, CE 200 QUIZ 2 QUESTIONS AND
ANSWERS 100% CORRECT!
Aggregate - ANSWER gravel, pebble, crushed stones, recylced porland cement
concrete and recylced asphalt concrete.
Coarse Aggregates - ANSWER Aggregates retained on Sieve No. 4
Used when making slabs, bases, pavement and runways
Fine Aggregate (Sand) - ANSWER Aggregates that pass Sieve No. 4
Needed for the workability of Porland cement concrete
Man-made aggregates - ANSWER Made of:
- Recycled concretes
- Crushed Masonry
- Slag from blast furnaces of steel (used for heavy-weight PCC)
- Expanded Shale + Clay (used for light-weight PCC)
-Polystyrene pieces (used for light-weight PCC)
Natural Aggregates - ANSWER rounded pebbles from river beds
Manufractured Aggregates - ANSWER Made of crushed stones from rock quarries,
mountains and gravel pits. Often crushed to a desirable size.
Properties of aggregates - ANSWER Size, density, unit weight and shape matter a lot
Rounded Aggregates - ANSWER The most expensive, used mainly for decoration and
in proland cement concrete
Angular Aggregates - ANSWER Used in Asphalt concrete, better the stability of the
concrete when under high loads or in high temperatures.
Elongated/ Flaky Aggregates - ANSWER Not desirable. They have high surface to
volume ratio, making it break very easily.
Aggregate Standards - ANSWER -durability
-absorption
-volume stability
ANSWERS 100% CORRECT!
Aggregate - ANSWER gravel, pebble, crushed stones, recylced porland cement
concrete and recylced asphalt concrete.
Coarse Aggregates - ANSWER Aggregates retained on Sieve No. 4
Used when making slabs, bases, pavement and runways
Fine Aggregate (Sand) - ANSWER Aggregates that pass Sieve No. 4
Needed for the workability of Porland cement concrete
Man-made aggregates - ANSWER Made of:
- Recycled concretes
- Crushed Masonry
- Slag from blast furnaces of steel (used for heavy-weight PCC)
- Expanded Shale + Clay (used for light-weight PCC)
-Polystyrene pieces (used for light-weight PCC)
Natural Aggregates - ANSWER rounded pebbles from river beds
Manufractured Aggregates - ANSWER Made of crushed stones from rock quarries,
mountains and gravel pits. Often crushed to a desirable size.
Properties of aggregates - ANSWER Size, density, unit weight and shape matter a lot
Rounded Aggregates - ANSWER The most expensive, used mainly for decoration and
in proland cement concrete
Angular Aggregates - ANSWER Used in Asphalt concrete, better the stability of the
concrete when under high loads or in high temperatures.
Elongated/ Flaky Aggregates - ANSWER Not desirable. They have high surface to
volume ratio, making it break very easily.
Aggregate Standards - ANSWER -durability
-absorption
-volume stability
