Testing of industrial products - Aggregates for construction

Precision values obtained from the cross-testing experiments on the Chloride test

Note. For all the tables here, "stragglers" have been included in the calculations, and "outliers" have been excluded.


Table 1. Repeatability and reproducibility
for the European cross-testing experiment.
Chloride ion contents (percentages by mass).
Level 1Level 2Level 3
Number of laboratories included N141516
AverageX 0.08400.02110.0017
Repeatability standard deviationSr ---0.0003---
Reproducibility standard deviationSR ---0.0004---
Repeatability standard deviationSr1 0.0010---0.0001
Reproducibility standard deviationSR1 0.0039---0.0003
Repeatability limitr ---0.0008---
Reproducibility limitR ---0.0012---
Critical rangeW 0.0036---0.0006
Repeatability limitr1 0.0028---0.0004
Reproducibility limitR1 0.0110---0.0008

Table 2. Functional relationships
for the European cross-testing experiment
Chloride ion contents (percentages by mass).
Functional relationship*
Repeatability standard deviationSr1 = 0.0001 + 0.011 X
Reproducibility standard deviationSR1 = 0.0002 + 0.044 X
Repeatability limitr1 = 0.0004 + 0.029 X
Reproducibility limitR1 = 0.0006 + 0.124 X

* Note: the relationships are fitted to the results for Levels 1 and 3 only.


Table 3. Repeatability and reproducibility standard deviations
for the European cross-testing experiment
expressed as coefficients of variation.
Level 1Level 2Level 3
Repeatability coefficient of variationCr---1.3---
Reproducibility coefficient of variationCR---2.0---
Repeatability coefficient of variationCr11.2--- 8.3
Reproducibility coefficient of variationCR14.7---15.9

Table 4. Repeatability and reproducibility
for the French cross-testing experiment.
Chloride ion contents (percentages by mass).
Level 1Level 2Level 3
Number of laboratories included N888
Average X0.08290.02090.0017
Repeatability standard deviation Sr---0.0001---
Reproducibility standard deviation SR---0.0003---
Repeatability standard deviation Sr10.0015---0.0001
Reproducibility standard deviation SR10.0064---0.0004
Repeatability limit r---0.0004---
Reproducibility limit R---0.0008---
Critical range W0.0047---0.0005
Repeatability limit r10.0042---0.0003
Reproducibility limit R10.0178---0.0011

Table 5. Functional relationships
for the French cross-testing experiment
Chloride ion contents (percentages by mass).
Functional relationship*
Repeatability standard deviation Sr1 = 0.0001 + 0.017 X
Reproducibility standard deviation SR1 = 0.0003 + 0.074 X
Repeatability limit r1 = 0.0002 + 0.048 X
Reproducibility limit R1 = 0.0007 + 0.206 X

* Note: the relationships are fitted to the results for Levels 1 and 3 only.


Table 6. Repeatability and reproducibility standard deviations
for the French cross-testing experiment
expressed as coefficients of variation.
Level 1Level 2Level 3
Repeatability coefficient of variation Cr---0.7---
Reproducibility coefficient of variation CR---1.4---
Repeatability coefficient of variation Cr11.8--- 7.1
Reproducibility coefficient of variation CR17.7---22.9