CE 3700 Midterm Exam Study Set 100% Pass
The predominant construction material in terms of volume of use - ANSWER aggregates
Aggregates alone are used for ___ - ANSWER road base and various types of fill
Aggregates as a binder are used for ___ - ANSWER asphalt cement or Portland cement
Aggregates are classified by their ____ - ANSWER 1. Source
2. Specific Gravity
3. Size
4. Petrogaphy
Petrogaphy - ANSWER the description and systematic classification of rocks, aided by
the microscopic examination of thin sections
Two types of aggregates - ANSWER 1. Natural Aggregates - rocks
2. Artificial - byproduct of another system
Natural Aggregates (natural gravel, natural sand) are found in nature through ____ -
ANSWER quarrying, crushing, washing, sieving
Artificial Aggregate examples - ANSWER 1. Blast-furnace slag (stone-like material that
is by product from the manufacture of iron)
2. Fly-ash
3. Manufactured light weight aggregate (made from expanded shale or clay)
4. Crushed waste concrete
5. Crushed bricks
Specific Gravity of Light Weight Aggregates - ANSWER <2.4
Specific Gravity of Normal Weight Aggregates - ANSWER 2.4 - 2.8
Specific Gravity of Heavy Weight Aggregates - ANSWER >2.8
Coarse aggregate - ANSWER Retained on No. 4 Sieve
Fine Aggregate - ANSWER Passing No. 4 Sieve
Filler - ANSWER >70% passing No. 200 Sieve
Properties of Aggregates - ANSWER 1. Gradation
, 2. Specific Gravity
3. Absorption and Surface Moisture
4. Shape and Surface Textures
5. Soundness
6. Durability
Gradation is _____ - ANSWER Distribution of particle size of aggregate
Gradation is determined by ____ - ANSWER ASTM C 136 Sieve Analysis of Fine and
Coarse Aggregates
Wire-mesh sieves have ____ opening - ANSWER square
Why is gradation used? - ANSWER 1. Determine grading of materials proposed for use
as aggregate
2. Check compliance with specification requirements
Sieves at the bottom have the ____ openings - ANSWER smallest
Fineness Module (FM) - ANSWER measure of the gradation of the fine aggregate
Fineness Module is the sum of the _____ on the seven sieve sizes ___ - ANSWER percent
retained
3/8, No. 4, No.8, No. 16, No. 30, No. 50, No. 100
Specific Gravity provides relationship between ____ - ANSWER mass and volume
Specific Gravity (G) = - ANSWER [Wt. of Agg.] / [Volume of Agg * unit wt of water]
Each aggregate is made of ___ - ANSWER solid volume, pores (may or may not be
accessible to water)
Apparent Volume - ANSWER Volume of the solid matter and the non accessible pores in
the particle
Bulk Volume - ANSWER Apparent Volume plus the volume of the water absorbed into the
pores
Aggregate weight varies with ____ - ANSWER moisture content
Volume is determined by the ___ - ANSWER volume of water it displaces
MC > Absorption : There is a ___ - ANSWER free moisture condition (Free surface
moisture = MC - Absorption)
MC < Apsorption - ANSWER The aggregate is in air-dry condition (Free moisture is
The predominant construction material in terms of volume of use - ANSWER aggregates
Aggregates alone are used for ___ - ANSWER road base and various types of fill
Aggregates as a binder are used for ___ - ANSWER asphalt cement or Portland cement
Aggregates are classified by their ____ - ANSWER 1. Source
2. Specific Gravity
3. Size
4. Petrogaphy
Petrogaphy - ANSWER the description and systematic classification of rocks, aided by
the microscopic examination of thin sections
Two types of aggregates - ANSWER 1. Natural Aggregates - rocks
2. Artificial - byproduct of another system
Natural Aggregates (natural gravel, natural sand) are found in nature through ____ -
ANSWER quarrying, crushing, washing, sieving
Artificial Aggregate examples - ANSWER 1. Blast-furnace slag (stone-like material that
is by product from the manufacture of iron)
2. Fly-ash
3. Manufactured light weight aggregate (made from expanded shale or clay)
4. Crushed waste concrete
5. Crushed bricks
Specific Gravity of Light Weight Aggregates - ANSWER <2.4
Specific Gravity of Normal Weight Aggregates - ANSWER 2.4 - 2.8
Specific Gravity of Heavy Weight Aggregates - ANSWER >2.8
Coarse aggregate - ANSWER Retained on No. 4 Sieve
Fine Aggregate - ANSWER Passing No. 4 Sieve
Filler - ANSWER >70% passing No. 200 Sieve
Properties of Aggregates - ANSWER 1. Gradation
, 2. Specific Gravity
3. Absorption and Surface Moisture
4. Shape and Surface Textures
5. Soundness
6. Durability
Gradation is _____ - ANSWER Distribution of particle size of aggregate
Gradation is determined by ____ - ANSWER ASTM C 136 Sieve Analysis of Fine and
Coarse Aggregates
Wire-mesh sieves have ____ opening - ANSWER square
Why is gradation used? - ANSWER 1. Determine grading of materials proposed for use
as aggregate
2. Check compliance with specification requirements
Sieves at the bottom have the ____ openings - ANSWER smallest
Fineness Module (FM) - ANSWER measure of the gradation of the fine aggregate
Fineness Module is the sum of the _____ on the seven sieve sizes ___ - ANSWER percent
retained
3/8, No. 4, No.8, No. 16, No. 30, No. 50, No. 100
Specific Gravity provides relationship between ____ - ANSWER mass and volume
Specific Gravity (G) = - ANSWER [Wt. of Agg.] / [Volume of Agg * unit wt of water]
Each aggregate is made of ___ - ANSWER solid volume, pores (may or may not be
accessible to water)
Apparent Volume - ANSWER Volume of the solid matter and the non accessible pores in
the particle
Bulk Volume - ANSWER Apparent Volume plus the volume of the water absorbed into the
pores
Aggregate weight varies with ____ - ANSWER moisture content
Volume is determined by the ___ - ANSWER volume of water it displaces
MC > Absorption : There is a ___ - ANSWER free moisture condition (Free surface
moisture = MC - Absorption)
MC < Apsorption - ANSWER The aggregate is in air-dry condition (Free moisture is
