Construction Materials (Exam 1) 2026/2027 Questions With
Complete Solutions
accelerating/ corrosion inhibiting additives Correct Answers 1:
quick set up concrete
2: quick set eliminates corrosion of structural steel.
3: Improves workability, high early strength, no bleeding
aggregate size reinforced bars Correct Answers 3/4 the clear
spacing between reinforcing bars and between reinforcing
forms. (Dmax= 3/4S and 3/4C)
aggregate size slab Correct Answers 1/3 the depth of slab
(Dmax=1/3T)
aggregate size vert concrete member Correct Answers 1/5 the
narrowest demension ( Dmax= 1/5B
Air Entraining addmixtures Correct Answers Improved
plasticity and workability
air void system Correct Answers -entrained air voids act as
empty chambers in the paste where freezing and migrating water
can enter, thus releiving preasure and prevent damage.
- the amount of pressure built from expanding water depends on
distance and size of air voids.
- spacing and size are important design factors, found in ASTM
C 457
ASTM C 33 Correct Answers specifications for concrete
AGGREGATES
, Packet 2: aggregates
ASTM C 94 Correct Answers Specification of READY MIX
CONCRETE
ASTM C 150 Correct Answers Specification for PORTLAND
CEMENT
packet section 4: Cement
Calculating void spacing Correct Answers L, index related to
the distance between bubble but not the actual average spacing
in the system. less than 0.200 mm
a, (surface area of the air voids) 24 square mm per cubic mm of
air void volume.
Cast in place Correct Answers follows all of the hardened
concrete tests
concrete placement sequence Correct Answers 1: prep area
2: subgrade prep
3: moisture control and vapor retarders
4: Formwork
5: feinforcement
6: depositing the concrete
7: consolidation - compaction; hand done of mechanically
8: Finishing - skreeting
concrete strength factors Correct Answers -changes in
aggregate size, grading, surface texture, shape, strength,
stiffness.
Complete Solutions
accelerating/ corrosion inhibiting additives Correct Answers 1:
quick set up concrete
2: quick set eliminates corrosion of structural steel.
3: Improves workability, high early strength, no bleeding
aggregate size reinforced bars Correct Answers 3/4 the clear
spacing between reinforcing bars and between reinforcing
forms. (Dmax= 3/4S and 3/4C)
aggregate size slab Correct Answers 1/3 the depth of slab
(Dmax=1/3T)
aggregate size vert concrete member Correct Answers 1/5 the
narrowest demension ( Dmax= 1/5B
Air Entraining addmixtures Correct Answers Improved
plasticity and workability
air void system Correct Answers -entrained air voids act as
empty chambers in the paste where freezing and migrating water
can enter, thus releiving preasure and prevent damage.
- the amount of pressure built from expanding water depends on
distance and size of air voids.
- spacing and size are important design factors, found in ASTM
C 457
ASTM C 33 Correct Answers specifications for concrete
AGGREGATES
, Packet 2: aggregates
ASTM C 94 Correct Answers Specification of READY MIX
CONCRETE
ASTM C 150 Correct Answers Specification for PORTLAND
CEMENT
packet section 4: Cement
Calculating void spacing Correct Answers L, index related to
the distance between bubble but not the actual average spacing
in the system. less than 0.200 mm
a, (surface area of the air voids) 24 square mm per cubic mm of
air void volume.
Cast in place Correct Answers follows all of the hardened
concrete tests
concrete placement sequence Correct Answers 1: prep area
2: subgrade prep
3: moisture control and vapor retarders
4: Formwork
5: feinforcement
6: depositing the concrete
7: consolidation - compaction; hand done of mechanically
8: Finishing - skreeting
concrete strength factors Correct Answers -changes in
aggregate size, grading, surface texture, shape, strength,
stiffness.
