Earthwork Construction Inspection Flashcards
6 cards from real CTQP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Earthwork Construction Inspection flashcards as text
What does the term 'optimum moisture content' refer to in earthwork compaction?
Answer: The moisture level at which soil achieves maximum dry density
Optimum moisture content is the moisture level at which a given soil achieves its maximum dry density under a specified compaction effort.
Which FDOT test method is used to determine the field density of compacted embankment material?
Answer: ASTM D 1556 or nuclear gauge method
FDOT uses the sand cone method (ASTM D 1556) or the nuclear density gauge to measure field compaction density of earthwork.
What minimum percent compaction is typically required for embankment fill under Florida Department of Transportation specifications?
Answer: 95%
FDOT specifications generally require embankment fill to be compacted to at least 95% of maximum dry density per AASHTO T 99 or T 180.
What is a 'borrow pit' in the context of CTQP earthwork inspection?
Answer: An off-site area from which suitable fill material is obtained
A borrow pit is an off-site excavation from which suitable embankment or fill material is obtained when sufficient on-site material is unavailable.
During earthwork inspection, what is the maximum lift thickness typically allowed for general embankment before compaction?
Answer: 12 inches loose measure
FDOT specifications typically limit loose lift thickness to 12 inches for general embankment to ensure adequate compaction throughout the layer.
What does 'unsuitable material' mean in FDOT earthwork specifications?
Answer: Material that cannot be adequately compacted or that will cause settlement
Unsuitable material includes organic soils, muck, or any material that cannot be properly compacted or that will cause detrimental settlement under load.