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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ASTM C172.C172M – 14 – Sampling Freshly Mixed Concrete
After obtaining the composite sample, wait a minimum of 2 minutes and a maximum of 5 minutes before beginning tests Note 5. Combine into one composite sample for testing purposes. Perform sampling by asrm a receptacle completely through the discharge stream, or by completely diverting the discharge into a sample container.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Obtain these portions within the time limit specified in Section 4. A superscript epsilon indicates an editorial change since the last revision or d172. These requirements apply to both tilting and nontilting mixers.
ASTM C / CM – 17 Standard Practice for Sampling Freshly Mixed Concrete
Referenced Documents purchase ashm The documents listed below are referenced within the subject standard but are not provided as part of the standard. Combine the samples so obtained into one composite sample for test purposes.
Warning —Fresh c127 cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.
C39M – 16 – Compressive Strength of Cylindrical Martins, Damasceno, Awada – Pronto-socorro Pronto-socorro: Sample by repeatedly passing a receptacle through the entire discharge stream or by completely diverting the discharge into a sample container.
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.
ASTM CCM – 14 – Sampling Freshly Mixed Concrete –
Approved October 1, To preclude contamination or absorption by the subgrade, sample the concrete by placing three shallow containers on the subgrade and discharging the concrete across the container. Scrape any mortar adhering to the sides of the wet-sieving equipment into the batch. NOTE 1—Composite samples are required by this practice, unless specifically excepted by procedures governing the tests c72 be performed such as tests to determine uniformity of consistency and mixer efficiency.
Due to the difficulty of determining the actual quantity of concrete discharged, the intent is to provide samples that are representative of widely separated portions, but not the beginning and the end of the load. Obtain samples from at least five different portions of the pile and combine them into one composite sample for test purposes.
Generally, a 1c72 back and forth motion is preferred. Smaller samples are c1772 prohibited for routine air content, temperature, and slump tests. Combining values from the two c712 may result in non-conformance with the standard. The air content of the wet-sieved fraction of concrete is greater than that of the total concrete because the larger size aggregate which is removed does not contain air. A number in parentheses indicates the year of last reapproval.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. The apparent strength of wet-sieved concrete in smaller specimens is usually greater than that of the total concrete in larger appropriate size specimens.
The equipment shall be capable of rapidly and effectively removing the designated size of aggregate. Work Item s – proposed revisions of this standard. Combining values from the two systems may result in non-conformance with the standard.
No further reproductions authorized. Mortar adhering to the aggregate retained on the sieve shall not be wiped from it before it is discarded. NOTE 5—The waiting period prior to commencing the testing is needed because the mix water is input only seconds before discharge from the continuous mixer. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Sample the concrete at the frequency specified by collecting two or more portions taken at regularly spaced intervals during discharge of the concrete.
Do not obtain portions of the composite sample from the very first or last part of the batch discharge Note 3. Avoid contamination with subgrade material or prolonged contact with and absorptive subgrade.
Complete these tests expeditiously. Link to Active This link will always route to d172 current Active version of the standard. NOTE 4—In c1722 instances, the containers may have to be supported above the subgrade to prevent displacement during discharge. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.
Take the samples so obtained within the time limit specified in Section 4 and combine them into one composite sample for test purposes. The containers shall be of a size sufficient to provide a composite sample size that is in agreement with the maximum aggregate size.
Active Risk Management
The effect of these differences may adtm to be considered or determined by supplementary testing for quality control or test result evaluation purposes. Last previous edition approved in as C— Expeditiously obtain and use the sample and protect the sample from the sun, wind, and other sources of rapid evaporation, and from contamination. Committee C09 has identified the location of selected changes to c1772 practice since the last issue, C—14, that may impact the use of this practice.
Agitators—Sample the concrete by collecting two or more portions taken at regularly spaced intervals during discharge of the middle portion of the batch. For example, wet-sieving concrete causes the loss of a small amount of air due to additional handling.