ASTM C1252 PDF
ASTM C Standard Test Methods for Uncompacted Void Content of Fine Aggregate (as Influenced by Particle Shape, Surface Texture. Matest proposes a wide range of testing equipment for ASTM C standard. For more info contact us. Purchase your copy of ASTM C – 17 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.
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Historical Version s – view previous versions of standard.
An increase in void content by these procedures indicates greater angularity, less sphericity, astk surface texture, or combinations thereof.
A decrease in void content results is associated with more rounded, spherical, or smooth-surfaced fine aggregate, or a combination thereof. This void content depends on grading as well as particle shape and texture. A sample consisting of single-size particles will have a higher void content than a graded sample.
Therefore, use either one method or the other as a comparative measure of shape and texture, and identify which test method has been used to obtain the reported data.
Uncompacted voids in aggregates (ASTM C )
Test Method C does not provide an indication of shape and texture directly if the grading from sample to sample changes. Typically, the material used to make up the standard graded sample can be obtained from the remaining size fractions after performing a single sieve analysis of the fine aggregate. However, Test Method B c252 additional information concerning the shape and texture characteristics of individual sizes.
In general, high void content suggests that the material could be improved by providing additional fines in the fine aggregate or more cementitious material f1252 be needed to fill voids between particles. The effectiveness of these test methods of determining void content and its relationship to particle shape and texture depends on the relative density specific gravity of the various size fractions being equal, or nearly so.
C252 void content is actually a function of the volume of each size fraction.
If the type of rock or minerals, or its porosity, in any of the size fractions varies markedly it may be necessary to determine the specific gravity of the size fractions used in the test. When measured on any aggregate of a known grading, void content provides an indication of that aggregate’s atm, sphericity, and surface texture compared with other fine aggregates tested in the same grading.
When void content is c12252 on an as-received fine-aggregate grading, it can be an indicator of the effect of the fine aggregate on the workability of a mixture in which it may be used.
Two use graded fine aggregate standard grading or as-received gradingand the other uses several individual x1252 fractions for void content determinations:. See the Section 9 for the grading.
For this test method, each size is tested separately. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Two use graded fine aggregate standard grading or as-received gradingand the other uses ast individual size fractions for void content determinations: Link to Active This link will always route to the current Active version of the standard.