Highway Construction Materials Testing Flashcards
6 cards from real NICET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Highway Construction Materials Testing flashcards as text
What test determines the structural adequacy of a compacted subgrade or base course for highway construction?
Answer: California Bearing Ratio (CBR) Test
The CBR Test measures the load-bearing capacity of subgrade and base course materials, providing data used to design pavement thickness.
What is the significance of the 95% compaction specification commonly used in highway construction?
Answer: Required degree of compaction relative to laboratory maximum dry density
A 95% compaction specification requires the field-compacted density to be at least 95% of the maximum dry density determined in the laboratory Proctor test.
Which test measures the consistency of freshly mixed Portland cement concrete?
Answer: Slump test
The slump test measures the consistency and workability of fresh concrete by measuring the vertical drop of a truncated cone of concrete after the mold is removed.
At what age is the standard compressive strength of concrete cylinders typically tested per ASTM C39?
Answer: 28 days
The standard compressive strength of concrete is determined at 28 days, which represents the design strength used for most structural applications.
What NICET HCMT work element covers asphalt concrete (hot mix asphalt) testing?
Answer: Asphalt Concrete
The Asphalt Concrete work element within NICET HCMT covers testing procedures for hot mix asphalt (HMA) including Marshall and Superpave mix design.
What is the purpose of the extraction test for hot mix asphalt?
Answer: Determine aggregate gradation of recovered aggregate and asphalt binder content
The extraction test (AASHTO T 164) separates the asphalt binder from the aggregate mixture, allowing determination of binder content and recovered aggregate gradation.