FDOT Concrete Inspection

Question 1

According to FDOT specifications, what is the minimum compressive strength (f'c) required for Class I concrete?

Accepted Answer

3,000 psi

Answer

FDOT Class I concrete requires a minimum compressive strength of 3,000 psi as specified in Standard Specifications Section 346.

Question 2

What FDOT specification section governs portland cement concrete for structures?

Accepted Answer

Section 346

Answer

FDOT Section 346 covers portland cement concrete materials and mix design requirements for structural concrete.

Question 3

When testing concrete slump on an FDOT project, how long after taking the sample must the test be completed?

Accepted Answer

5 minutes

Answer

Per AASHTO T 119 referenced in FDOT specifications, the slump test must be completed within 5 minutes of obtaining the composite sample.

Question 4

What is the maximum water-cementitious material (w/cm) ratio allowed for FDOT Class IV concrete?

Accepted Answer

0.44

Answer

FDOT Class IV concrete, used in structures exposed to seawater, has a maximum w/cm ratio of 0.44 to ensure durability.

Question 5

According to FDOT specifications, what minimum curing period is required for concrete structures using water curing?

Accepted Answer

7 days

Answer

FDOT requires a minimum of 7 days of water curing for concrete structures to ensure adequate strength gain and durability.

FDOT - Florida Department of Transportation Practice Test