Measurement of the density of the top inch of asphalt paving by gamma radiation

K. Preiss; D. Nadavia; H. Grossberg

doi:10.1007/BF02474876

Measurement of the density of the top inch of asphalt paving by gamma radiation

K. Preiss, D. Nadavia, H. Grossberg

Research output: Contribution to journal › Article › peer-review

Abstract

An instrument was developed to measure, non-destructively, the density of the top 2.5 cm layer of an asphalt paving. The instrument is based on the principle of gamma ray backscattering, but differs from the usual instrument in that the depth of measurement is only 2.5 cm. This is achieved by using a low energy source, Am 241, with a source to detector distance of 5.5 cm, and a NaI (Tl) detector. The instrument was checked in the field against the method of coring, cutting and weighing, and the root-mean-square difference between the methods was found to be 0.02 g/cc, which is less than 1%.

Original language	English
Pages (from-to)	331-334
Number of pages	4
Journal	Materials and Structures/Materiaux et Constructions
Volume	5
Issue number	5
DOIs	https://doi.org/10.1007/BF02474876
State	Published - 1 Sep 1972
Externally published	Yes

ASJC Scopus subject areas

General Engineering

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10.1007/BF02474876

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title = "Measurement of the density of the top inch of asphalt paving by gamma radiation",

abstract = "An instrument was developed to measure, non-destructively, the density of the top 2.5 cm layer of an asphalt paving. The instrument is based on the principle of gamma ray backscattering, but differs from the usual instrument in that the depth of measurement is only 2.5 cm. This is achieved by using a low energy source, Am 241, with a source to detector distance of 5.5 cm, and a NaI (Tl) detector. The instrument was checked in the field against the method of coring, cutting and weighing, and the root-mean-square difference between the methods was found to be 0.02 g/cc, which is less than 1%.",

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AU - Nadavia, D.

AU - Grossberg, H.

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N2 - An instrument was developed to measure, non-destructively, the density of the top 2.5 cm layer of an asphalt paving. The instrument is based on the principle of gamma ray backscattering, but differs from the usual instrument in that the depth of measurement is only 2.5 cm. This is achieved by using a low energy source, Am 241, with a source to detector distance of 5.5 cm, and a NaI (Tl) detector. The instrument was checked in the field against the method of coring, cutting and weighing, and the root-mean-square difference between the methods was found to be 0.02 g/cc, which is less than 1%.

AB - An instrument was developed to measure, non-destructively, the density of the top 2.5 cm layer of an asphalt paving. The instrument is based on the principle of gamma ray backscattering, but differs from the usual instrument in that the depth of measurement is only 2.5 cm. This is achieved by using a low energy source, Am 241, with a source to detector distance of 5.5 cm, and a NaI (Tl) detector. The instrument was checked in the field against the method of coring, cutting and weighing, and the root-mean-square difference between the methods was found to be 0.02 g/cc, which is less than 1%.

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Measurement of the density of the top inch of asphalt paving by gamma radiation

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