CT 231 Questions and Correct Answers/ Latest Update / Already Graded

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CT 231 Questions and Correct Answers/
Latest Update / Already Graded
What does this test method explain?

Ans: the procedure for selecting a test area for the
determination of in-place wet density and moisture content of
untreated and treated soils and aggregates by the use of a
nuclear gage and the determination of rel ative compaction.


Two parts of this test method

Ans: - Determination of In-Place Wet Density and Moisture
Content


- Determination of Relative Compaction


Equipment used

Ans:


Nuclear gauge

Ans: a portable instrument containing radioactive sources,
detectors, electronics and battery packs. The instrument must
be calibrated in accordance with California Test 111.


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Reference standard block

Ans: a block provided by the gage manufacturer primarily for
checking instrument operation and for establishing standard
counts against which future measurements are compared.


Metal guide plate

Ans: the guide plate should be no smaller in any dimension
than the footprint of the nuclear gage. The plate must be flat to
a tolerance of 1/16 in. in any plane


Pin

Ans: meets the gage manufacturer's specifications or suitable
equipment (e.g., slide hammer, drill) capable of producing a
hole meeting the manufacturer's requirements and with out
disturbing the surrounding material to be tested.


Procedure

Ans:


Part 1: DETERMINATION OF IN-PLACE WET DENSITY AND
MOISTURE CONTENT
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