ASTM C114-18 pdf free download.Standard Test Methods for Chemical Analysis of Hydraulic Cement.
These test methods cover the chemical analyses of hydraulic cements. Any test methods of demonstrated acceptable precision and bias may he 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. They are grouped as Reference Test Methods and Alternative Test Methods. 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.
5.2.1 Qualification of the analyst shall be demonstrated by analysis of each analyte of concern using at least one CRM cement in duplicate, no matter what test method is used (Note
2). Duplicate samples shall be tested on different clays. 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 I and the average of the two samples agrees with the certificate value of the CRM within the limits listed in column 3 of Table I after correction for minor components when needed. The same test methods to he used for analysis of cement being tested shall he 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.
NOTE 2—When qualifying a Rapid Method with seven URMs in accordance with 5.4.2. the analyst performing the qualification of the test method may simultaneously qualify for the requirement of 5.2. 1.
5.2.2 Qualification data demonstrating that the same operator or analyst making the acceptance determination obtained precise and accurate results with CRM cements in accordance with 5.2.1 shall be macic available on request to all parties concerned when there is a question of acceptance of a cement. If the CRM used is not a NIST cement, the traceability documentation of the CRM used shall also he made available on request.
5.3 Alternative Analyses—The alternative test methods provide, in some cases, procedures that are shorter or more convenient to use for routine determination of certain constituents than are the reference test methods (Note 3). 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 unusual 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 — 30 requires method qualification in accordance with 5.4, the Performance Requirements for Rapid Test Met/iods section.ASTM C114 pdf download.