ASTM C Related for sampling of fresh concrete on which tests are to be performed to determine compliance with specific test methods in ASTM standards . Materials. Sampling. Testing. C Cement. C Agg. C Air. C Admix. C Ash. C Water. C Sampling Fresh Concrete. ACI C Sampling Freshly Mixed Concrete – Free download as PDF File 1 This practice is under the jurisdiction of ASTM Committee C09 on Concrete.
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Combine into one composite sample for testing purposes. If you feel that your comments have not received a fair hearing you should make your views c712 to the ASTM Committee on Standards, at the address shown below.
Originally approved in Do not obtain portions of the composite sample from the very first or last part of the batch discharge Note 3. A number in parentheses indicates the year of last reapproval.
ASTM C172 – Sampling Fresh Concrete
Procedures used to select the specific test batches are not described in this practice, but it is recommended that random sampling be used to determine overall specification compliance. ASTM Volume Take the portions so obtained within the time limit specified in Section 4, and combine them into one composite sample for test purposes. The concrete which passes the sieve shall fall into a batch pan of suitable size which has been dampened before use wstm onto a clean, moist, nonabsorbent surface.
The size of the samples shall be dictated by the maximum aggregate size. 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. Combine the samples so obtained into one composite sample for test purposes.
Warning aatm hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure. Combining values from the two systems may result in non-conformance with the standard. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: The effect of these differences may need to be considered or determined by supplementary testing for quality control or test result evaluation purposes.
Obtain these portions within the time limit specified in Section 4. After removing the larger aggregate particles by wet-sieving remix the batch with a shovel the minimum amount necessary to ensure uniformity and proceed testing immediately.
Take care not to restrict the flow of concrete from the mixer, container, or transportation unit so as to cause segregation.
asfm They shall be combined and remixed with a shovel the minimum amount necessary to ensure uniformity and compliance with the maximum time limits specified in 4. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Avoid contamination with subgrade material or prolonged contact with and absorptive subgrade.
CM – 12 – Microscopical Determination of ASTM Ast, takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Place only enough concrete on the sieve at any one time so that after sieving, the thickness of the layer of retained aggregate is not more than one particle thick.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
ASTM C172.C172M – 14 – Sampling Freshly Mixed Concrete
A superscript epsilon indicates an editorial change since the last revision or reapproval. Obtain samples from at least five different portions of the pile and combine them into one composite sample asym test purposes.
Mixers—Sample the concrete by collecting two or more portions taken at regularly spaced intervals during discharge of the middle portion xstm the batch. If discharge of the concrete is too rapid to divert the complete discharge stream, discharge the concrete into a container or transportation unit sufficiently large to accommodate the entire batch and then accomplish the sampling in the same manner as given above.
ASTM C / CM – 17 Standard Practice for Sampling Freshly Mixed Concrete
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Smaller samples are not prohibited for routine asstm content, temperature, and slump tests. These requirements apply to both tilting and nontilting mixers.
Combining values from the two systems may result in non-conformance with the standard. The apparent strength of wet-sieved concrete in smaller specimens is usually greater than that of the total concrete in larger appropriate size specimens.
Shake or vibrate the sieve by hand or mechanical means until no undersize material remains on the sieve.
After obtaining the composite sample, wait a minimum of 2 minutes and a maximum of 5 minutes before beginning tests Note 5. C39M – 16 – Compressive Strength of Cylindrical Approved October 1,