Standard Test Method for Evaluation of Cement Strength Uniformity From a Single Source

SIGNIFICANCE AND USE
This test method is designed to present in a standardized format information on the variability of strength of cement from a single source over a period of time. It can be applied to all hydraulic cements covered in Specifications C 150, C 595, and C 1157.  
Note 1—It should be recognized that concrete strength variability is influenced by other factors in addition to cement strength variability.
SCOPE
1.1 This test method is intended for use in instances in which the purchaser desires information on the strength uniformity of a hydraulic cement produced at a single source. It is intended that this test method normally be used for the predominant cement manufactured at a cement plant. Guidelines for sampling, testing, presentation of results, and evaluation are given.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

General Information

Status
Historical
Publication Date
31-Jan-2005
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM C917-05 - Standard Test Method for Evaluation of Cement Strength Uniformity From a Single Source
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C917–05
Standard Test Method for
Evaluation of Cement Strength Uniformity From a Single
1
Source
This standard is issued under the fixed designation C917; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope from a single source over a period of time. It can be applied to
all hydraulic cements covered in Specifications C150, C595,
1.1 This test method is intended for use in instances in
and C1157.
which the purchaser desires information on the strength uni-
formityofahydrauliccementproducedatasinglesource.Itis
NOTE 1—It should be recognized that concrete strength variability is
intended that this test method normally be used for the influenced by other factors in addition to cement strength variability.
predominant cement manufactured at a cement plant. Guide-
5. Sampling
lines for sampling, testing, presentation of results, and evalu-
ation are given. 5.1 All sampling shall be performed by quality control or
testing personnel or someone specifically trained for this
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
as the standard. The values in parentheses are for information purpose.
5.2 Takerandomgrabsamplesfromdeliveryunitsorduring
only.
1.3 This standard does not purport to address all of the the loading or unloading process. Delivery units larger than
125 tons (115 Mg) shall be sampled during loading or
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- unloading. If samples are taken during loading or unloading,
the two or more portions that are to be composited to make a
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. sample shall be taken during the transfer to no more than 125
tons (115 Mg) of cement. Identify samples by the date on
2. Referenced Documents
which the cement they represent was shipped or received.
2
2.1 ASTM Standards:
NOTE 2—Standardstatisticalproceduresarerecommendedforensuring
C109/C109M Test Method for Compressive Strength of
thatsamplesareselectedbyarandomprocedure.Theseprocedurescanbe
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
used to select the days within a month or within a week that samples will
Specimens)
be taken. Then the delivery unit or the time of day can be chosen
randomly.
C150 Specification for Portland Cement
C219 Terminology Relating to Hydraulic Cement
5.3 If taken from a truck or rail car, take at least two
C595 Specification for Blended Hydraulic Cements
separate 5-lb (approximately 2.3-kg) grab samples and thor-
C1157 Performance Specification for Hydraulic Cement
oughly mix together to obtain a minimum 10-lb (4.5-kg) test
E456 Terminology Relating to Quality and Statistics
sample. Sample only through hatches in the top of the unit.
Remove approximately a 12-in. (300-mm) layer of cement.
3. Terminology
Makeaholebeforeobtainingasampletoavoidcollectingdust
3.1 Definitions—Fordefinitionsoftermsrelatingtothistest
collectormaterialthatmaybedischargedintothedeliveryunit
method, refer to Terminologies C219 and E456.
after the cement flow ceases.
5.4 If taken from another point in the loading or unloading
4. Significance and Use
process,thesampleshallconsistofaminimumoftwoseparate
4.1 Thistestmethodisdesignedtopresentinastandardized
5-lb (approximately 2.3-kg) grab samples thoroughly mixed
format information on the variability of strength of cement
together or at least 10 lb (4.5 kg) as accumulated by a
continuous sampler. Take care to avoid segregation and con-
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC01onCement
tamination of samples taken from screws, pneumatic systems,
and is the direct responsibility of Subcommittee C01.27 on Strength.
or air slides.
Current edition approved Feb. 1, 2005. Published February 2005. Originally
5.5 When samples are taken at the cement plant and
approved in 1979. Last previous edition approved in 1998 as C917–98. DOI:
10.1520/C0917-05. shipments or rate of production of the cement exceeds 25000
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tons (23000 Mg) per month, take samples at a rate of at least
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
tenpermonthandatleasttwoperweek.Whenshipmentorrate
Standards volume information, refer to the standard’s Document Summary page on
of production of the cement is less than 25000 tons (23000
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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