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| Publication Type:
| Report |
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| Author(s): | Clegg, B. |
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| Title: | An impact testing device for in situ base course evaluation |
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| Source: | Australian Road Research Board Proceedings. Vol. 8, No. 8, 1976, p. 1-6. |
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| Publishing Information: | [Vermont South, Victoria, Australia]: Australian Road Research Board |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Clegg impact test; Equipment; Surface hardness; Analytical methods
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| Abstract/Contents: | "This paper describes the development of an impact testing device for evaluation of pavement base courses. It consists essentially of a laboratory compaction hammer to which has been attached to an accelerometer. The peak output from the accelerometer as generated by impact with the ground surface is indicated on a specially designed hand-held meter. The procedure is to apply a series of impacts at the one position until a constant value is being recorded. This usually requires about six blows. Laboratory and field experimental results are presented for a well-graded fine crushed rock, a laterite gravel, a calcareous sandstone and a fine sand. These data indicate the influence of moisture content on the impact value. It is deduced that there is a relationship between the Texas Class Numbers and the accelerations, and that a unique is indicated for the 'dry leg' of the compaction curve; on this basis it is suggested that it should be possible to devise a procedure for acceptance based on the accelerations. Using a 500 gram hammer it is possible to extend the procedure for application to density control of fine sand. It is concluded that the instrument meets the main requirements for an in situ test and that it may provide a means of quickly and economically assessing acceptable construction." |
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| Language: | English |
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| References: | 12 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Clegg, B. 1976. An impact testing device for in situ base course evaluation. Aust. Road Res. Board Proc. 8(8):p. 1-6. |
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