C – 00 Standard Test Methods for Chemical Analysis of Hydraulic Cement, chemical analysis, compositional analysis, hydraulic cements. ASTM Standards: 2. C 25 Test Methods for Chemical Analysis of Limestone,. Quicklime, and Hydrated Lime. D Specification for Reagent Water. ASTM C accreditation for cement analysis . are within the prescribed limits for iron, so acceptable (according to ASTM-C requirement).
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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.
ASTM C114 – 15 – Chemical Analysis of Hydraulic Cement
A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval. Any test methods of demonstrated acceptable precision and bias may be used for analysis of hydraulic cements, including analyses for referee and certification purposes, as explained in Section 4.
Specific chemical test methods are provided for ease of reference for those desiring to use them. The reference test methods are long accepted classical chemical test methods which provide a reasonably well-integrated basic scheme of analysis for hydraulic cements. The alternative test methods generally provide individual determination of specific analytes and may be used alone or as alternates and determinations within the basic scheme at the option of the analyst and as indicated in the individual method.
No other units of measurement are included in this standard.
D114 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. Current edition approved April 15, Originally approved in Last previous edition approved in as C — No further reproductions authorized.
The reference test methods that follow in Sections 7—2 2, or other test methods qualified according to 5.
A cement shall not be rejected for failure to conform to chemical requirements unless all determinations of constituents involved and all necessary separations prior to the determination of any one constituent are made entirely by these methods.
When reporting the results of referee analyses, specify which test methods were used. If the two results do not agree within the permissible variation xstm in Table 1, the determination shall be repeated until two or three results agree within the permissible variation.
When two or three results do agree within the permissible variation, their average shall be accepted as the correct value. When an average of either two or three results can be calculated, the calculation shall be based on the three results.
For the purpose of comparing analyses and calculating the average of acceptable results, the percentages shall be calculated to the nearest 0. When a blank determination See Note 1 i s specified, one shall be made with each individual analysis or with each group of two or more samples analyzed on the same day for a given analyte.
NOTE 1—A blank determination is a procedure which follows all steps of analysis but in the absence of a sample. It is used for detection and asgm of systematic bias.
ASTM C – 18 Standard Test Methods for Chemical Analysis of Hydraulic Cement
Material CRM must be used in the qualification of test methods and analysts. Acceptable reference cements are NIST.
The reference cement must have an assigned value for the analyte being determined. Traceability consists of documentary evidence that the assigned values of the reference. A When seven CRM cements are required, as for demonstrating the performance of rapid test methods, at least six of the seven shall be within the prescribed limits and the seventh shall differ by no more than twice that value.
When a lesser number of CRM cements are required, all of the values shall be within the prescribed limits. In such cases, only the requirement for differences between duplicates shall apply.
C Interelement corrections may be used for any oxide standardization provided improved accuracy can be demonstrated when the correction is applied to all seven CRM cements.
D Where an CRM certificate value includes a subscript number, that subscript number shall be treated as a valid significant figure.
No certificate value given. F Demonstrate performance by analysis, in duplicate, of at least one Portland cement. Prepare three standards, each in duplicate: Weigh and prepare two separate specimens of each standard.
Assign the CO2 content of Standard A as the average of the two values determined, provided they agree within the required limit of Column 2. CO2 from the certificate value by the mass fraction of Certified CaCO3 added to that standard percentage added divided by ; multiply the value determined for. Standard A by the mass fraction of Standard A in each of the other standards that is, 0. Maximum difference between the duplicate CO 2 values for Standards B and C, respectively, shall be 0.
To demonstrate traceability for a given analyte, perform a referee analysis as defined in 4. The reference cement is acceptable if its assigned value agrees with the average referee value within the limits given in column 3 of Table 1. If the reference cement, as supplied, has no documented guarantee of homogeneity, establish its homogeneity by analyzing at least six randomly selected samples.
No result shall deviate from the assigned value by more than the limits given in column 2 of Table 1. A n c1144 reference cement must be accompanied by a document showing the data produced in demonstrating traceability and homogeneity. When Reference Methods are used, qualification testing of the analyst is required as described in 5. Satm Rapid Methods are used, qualification testing of both the analyst and the test method are required as described in 5.
Such demonstration may be made concurrently with analysis of the cement being tested. The requirements for qualification of a test method and analyst are summarized in Table 2.
Duplicate samples shall be tested on different days. The analyst is considered qualified when the difference between the duplicate results does not vary by more than the value listed in Column 2 of Table 1 and the average of the two samples agrees with the certificate value of the CRM within the limits listed in Column 3 of Table 1 after correction for minor components when needed.
The same test methods to be used for analysis of cement being tested shall be used for analysis of the CRM cement. If either of the two requirements listed above are not met, identify and correct any problems or errors found in the procedure. Repeat the determinations until a set of duplicate results agree within the permissible variations. Requalification of the analyst is required every two years. Longer, more complex procedures, in some instances, have been retained as alternative test methods to permit comparison of results by different procedures or for use when unusual materials are being examined, where unusual interferences may be suspected, or when astk preparation for analysis is required.
Test results from alternative test methods may be used as a basis for acceptance or rejection when it is clear that a cement does or does not meet the specification requirement. Any change in test method procedures from those procedures listed in Sections 7—3 0 requires method qualification in accordance with 5. NOTE 3—It is not intended asrm the use of reference test methods be confined to referee analysis.
A reference test method may be used in preference to an alternative test method when atsm desired. A reference test method must be used where an alternative test method is not provided.
If, however, a blank determination xstm desired for an alternative test method, one may be used and it need not have been obtained concurrently with the analysis. The final results, when corrected for blank values, should, in either case, be so designated. Parte 1 de