CLASSIFICATION OF CHALK USING AN IMPACT CRUSHING TEST
A new impact crushing test has been developed for classifying chalk in relation to its behavior during construction of chalk embankments. The new test assigns a "crushing value" to chalk samples which, together with moisture content, will aid in the classification of chalks at the site investigation state, in relation to the quality of the fill material they are likely to produce. In addition, the test will identify those chalks susceptible to crushing and which may produce weak unstable fill during construction. The crushing values of the sample is defined as one-tenth of the slope of the straight section of the line resulting when penetration is plotted against the logarithm of the number of blows. As the rate of crushing increases the slope of the line increases and a soft chalk will therefore have a higher crushing value than a hard chalk. The crushing value has been found to be independent of moisture content. The relation between the results of the impact crushing tests and the vibrocrushing tests developed in France, indicates that the simplicity and potential lack of susceptibility to operator variability of the impact crushing test is likely to make it the more popular method in practice.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00174653
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Corporate Authors:
Foundation Publications Limited
7 Ongar Road
Brentwood CM15 9AU, Essex, England -
Authors:
- Ingoldby, H C
- Publication Date: 1977-7
Media Info
- Features: Figures; References;
- Pagination: p. 15-16
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Serial:
- GROUND ENGINEERING
- Volume: 10
- Issue Number: 5
- Publisher: EMAP CONSTRUCT LIMITED
- ISSN: 0017-4653
Subject/Index Terms
- TRT Terms: Butane; Chalks; Crushing; Embankments; Fills; Moisture content; Pendulum tests
- Uncontrolled Terms: Site investigation
- Subject Areas: Geotechnology; Highways;
Filing Info
- Accession Number: 00165941
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 26 1978 12:00AM