This standard specifies the determination of loss on ignition (LOI), SO3, insoluble matter (IR), SiO2, Fe2O3, Al2O3, CaO, MgO, TiO2, Cl-, K2O, Na2O, S2-, MnO, P2O5, CO2, ZnO, F-, free calcium oxide (fCaO), and SrO by methods for chemical analysis of cement, X-ray fluorescence analysis method, and inductively coupled plasma optical emission spectrometry. Methods for chemical analysis of cement are divided into reference method and alternative method. If multiple determination methods are listed for the same component, the reference method shall prevail in case of any dispute.
This standard is applicable to common portland cement, the clinker and raw meal for preparing the said cement, and other types of cement and materials for which this standard is designated.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5762 Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 12573 Sampling method for cement
GB/T 15000 (All parts) Directives for the work of reference materials
GSB 08-1110 X-ray fluorescence analysis of cement raw meal - Series reference sample
GSB 08-1355 Composition analysis of cement clinker - Reference sample
GSB 08-1356 Component analysis of ordinary portland cement - Reference sample
GSB 08-1357 Component analysis of ordinary portland cement - reference sample
GSB 08-2985 X-ray fluorescence analysis of cement - Series reference sample
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 15000 (all parts) and the following apply.
3.1
repeatability conditions
conditions where independent test results are obtained on the same test object by the same operator using the same equipment according to the same method in the same laboratory in a short time
3.2
reproducibility conditions
conditions where test results are obtained on the same test object by different operators using different equipment according to the same method in different laboratories
3.3
repeatability limit
a value delimiting a probability of 95% that the absolute difference of two test results is less than or equal to it under the repeatability conditions (3.1)
3.4
reproducibility limit
a value delimiting a probability of 95% that the absolute difference of two test results is less than or equal to it under the reproducibility conditions (3.2)
3.5
series certified reference materials for x-ray fluorescence analysis
a complete set of reference samples associated with chemical compositions, which is used to calibrate analytical instruments such as X-ray fluorescence analyzer
4 General requirements for testing
4.1 Number of tests and requirements
The number of tests for determination of each chemical property shall be two. The absolute difference between the two results shall be within the repeatability limit (Tables 3, 4 and 5). The mean of the two test results shall be used to express the test result.
During routine production control analysis, determination of each chemical property by a single test shall be the minimum required.
It is recommended to determine the loss on ignition while chemical analysis is carried out.
Except for determination of loss on ignition, blank test shall be carried out in parallel, and the determination results shall be corrected.
4.2 Expression of masses, volumes, titers and results
