Work Item s — proposed revisions of this standard. Other factors being equal, larger samples astm c tend to be more representative of the total supply. Similarly, if the astm c sample is being examined for certain contaminants occurring in only small percentages, caution should be used in interpreting results from the reduced size test sample.
Sieve size is identified by its standard designation in Specification E Chance inclusion or exclusion of only one or two particles in the selected test sample may importantly influence interpretation of the characteristics of the original sample.
Substantial differences between astm c selected astm c samples sometimes cannot be avoided, for example, in the case of an aggregate having relatively few large size particles in asstm sample. The laws of chance dictate that these few particles may astm c unequally distributed among the reduced size test samples.
A … Read more. Standard Specification for Standard Sand1 This standard is issued under the fixed designation C ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
A superscript epsilon e indicates an editorial … Read more. Substantial differences between the selected test samples sometimes can- not be avoided, as for example, in the case of an aggregate having relatively few large size particles in the sample. The laws of chance dictate that these few particles may be unequally distributed among the reduced size test samples. Similarly, if the test sample is being examined for certain contaminants occurring as a few discrete fragments in only small percentages, caution should be used in interpreting results from the reduced size test sample.
Chance inclusion or exclusion of only one or two particles in the selected test sample may importantly influence interpretation of the charac- teristics of the original sample. In these cases, the entire original sample should be tested. Selection of Method 5. Reduce the size of samples having free moisture on the particle surfaces by quartering according to Method B, or by treating as a miniature stockpile as described in Method C.
Current edition approved Aug. Published September Originally approved in Last previous edition approved in as C DOI: Alternatively, if the moist sample is very large, make a preliminary split using a mechanical splitter having chute openings of 38 mm [in. Dry the portion so obtained, and reduce it to test sample size using Method A.
As a quick approximation, if the fine aggregate will retain its shape when molded in the hand, it may be considered to be wetter than saturated-surface-dry.
The miniature stockpile Method C is not permitted for coarse aggregates or mixtures of coarse and fine aggregates. Sampling 6. When tests for sieve analysis only are contemplated, the size of the field sample listed in Practice D75 is usually adequate. When additional tests are to be conducted, the user shall besatisfied that the initial size of the field sample is adequate to accomplish all intended tests. Use similar procedures for aggregate produced in the laboratory.
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