Concrete & Masonry Construction Flashcards
7 cards from real FCC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Concrete & Masonry Construction flashcards as text
What is the minimum compressive strength (f'c) typically specified for residential concrete footings in Florida per the Florida Building Code?
Answer: 2,500 psi
The Florida Building Code requires a minimum compressive strength of 2,500 psi for residential concrete footings to ensure adequate structural support.
When testing concrete for slump, what does a higher slump value indicate about the concrete mix?
Answer: Higher workability and water content
A higher slump value indicates more workability due to a higher water content, which generally reduces the final compressive strength of the concrete.
In Florida's coastal environment, which type of cement is most commonly specified to resist sulfate attack in soils and groundwater?
Answer: Type V Portland cement
Type V Portland cement provides high sulfate resistance and is specified in aggressive sulfate exposure conditions common in Florida's coastal soils and groundwater.
What is the minimum concrete cover required for reinforcing steel in a concrete slab exposed to earth or weather per ACI 318?
Answer: 1.5 inches
ACI 318 requires a minimum of 1.5 inches of concrete cover for #5 bars and smaller in slabs exposed to weather to protect the reinforcement from corrosion.
Which masonry unit type has the highest compressive strength rating and is commonly used for load-bearing walls in Florida construction?
Answer: Grade N concrete masonry units
Grade N concrete masonry units have the highest compressive strength and are suitable for use above and below grade in exterior and interior walls.
According to ASTM standards, what is the maximum allowable absorption rate for a Grade SW (severe weathering) brick?
Answer: 22%
ASTM C216 allows a maximum water absorption of 22% by weight for Grade SW brick, which is designed for exterior use in severe weather conditions.
When placing concrete in hot weather conditions (above 90°F), which of the following is the most effective method to reduce mix temperature?
Answer: Using chilled water or ice to replace part of the mix water
Substituting chilled water or ice for a portion of the mix water directly lowers the concrete temperature, preventing rapid setting and strength reduction in hot weather.