AASHTO Designation: T 310-06 pdf free download

Standard  Method  of Test for

In-Place Density and  Moisture Content of Soil and

Soil-Aggregate  by Nuclear Methods (Shallow Depth)

AASHTO Designation: T 310-06


AASHTO Designation: T 310-06 pdf free download

1.1.This test method describes the procedure for determining the in-place density and moisture of soil and soil-aggregate by use of nuclear gauge.

The density of the material may be determined by either direct transmission, backscatter, or backscatter/air-gapratio  method.

The moisture of the material is determined only from measurements taken at the surface of the soil (i.e., backscatter).

1.2.Density-The  total or wet density of soil and soil-rock mixtures is determined by the attenuation of gamma radiation where the source or detector is placed at a

known depth up to 300 mm (12 in.) while the detector(s) or source remains on the surface (Direct Transmission Method) or the source and detector(s) remain on the surface (Backscatter Method).

1.2.1.The density in mass per unit volume of the material under test is determined by comparing the detected rate of gamma radiation with previously established calibration data.

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