Report No. 914 Aggregates Proficiency Testing Round 14 ... · PDF fileFlakiness Index (nearest 1%) ... - the robust coefficient of variation, expressed as a percentage ( Robust CV

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Report No. 914

Aggregates Proficiency Testing

Round 14

August 2015

Acknowledgments

PTA wishes to gratefully acknowledge the technical assistance provided for this program and for the supply of the samples by Mr G Hooper, Golder Associates Pty Ltd.

© Copyright Proficiency Testing Australia, 2015

PO Box 7507 SILVERWATER NSW 2128, Australia

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CONTENTS

1. FOREWORD ........................................................................................................ 1

2. FEATURES OF THE PROGRAM ......................................................................... 1

3. FORMAT OF THE APPENDICES ........................................................................ 2

4. STATISTICAL DESIGN OF THE PROGRAM ....................................................... 2

Table A: Summary Statistics ................................................................................ 5

5. PTA AND TECHNICAL ADVISER’S COMMENTS ............................................... 6

Table B: Comparison of Robust CVs and Percentage of Outliers ....................... 8

6. OUTLIER RESULTS ........................................................................................... 10

Table C: Summary of Statistical Outliers ........................................................... 10

7. REFERENCE ..................................................................................................... 10

APPENDIX A – Results and Data Analysis

Apparent Particle Density (nearest 0.01 t/m3)..........................................................…A1

Particle Density on a Dry Basis (nearest 0.01 t/m3)..................................................…A2

Particle Density on a Saturated-Surface-Dry Basis (nearest 0.01 t/m3)....................…A4

Water Absorption (nearest 0.1%).............................................................................…A5

Particle Size Distribution (nearest 0.1%)..................................................................…A7

Flakiness Index (nearest 1%).................................................................................. …A15

Dry Strength at Nominated Load (nearest 0.1%)..................................................... …A16 APPENDIX B – Homogeneity Testing

Homogeneity Testing................................................................................................…B1 APPENDIX C – Documentation

Instructions to Participants........................................................................................…C1

Results Sheet............................................................................................................…C2

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1. FOREWORD

This report summarises the results of a proficiency testing program on the determination of mechanical tests of aggregate. It constitutes the fourteenth round of an ongoing series of programs. The program was conducted in June 2015 by Proficiency Testing Australia (PTA). The aim of the program was to assess laboratories’ abilities to competently perform the prescribed analyses. The Program Coordinator was Ms Laura Galbraith and the Technical Adviser was Mr G Hooper, Golder Associates Pty Ltd. This report was authorised by Mrs F Watton, PTA Quality - Business Development Manager.

2. FEATURES OF THE PROGRAM (a) Participants were provided with one 13kg sample containing aggregate. (b) A total of 51 laboratories received samples, comprising:

- 41 Australian participants; and

- 10 overseas participants, including:

- Malaysia (1); - New Zealand (1); - Papua New Guinea (4); - Qatar (2); and - Republic of Korea (2).

Of these 51 laboratories, 2 were unable to submit results by the due date. (c) Laboratories were provided with the Instructions to Participants and Results

Sheet (see Appendix C). Laboratories were requested to perform the tests according to their routine methods and to record their results on the Results Sheet.

(d) Prior to sample distribution, a number of randomly selected samples were

analysed for homogeneity. Based on the results of this testing (see Appendix B), the homogeneity of the samples was established.

(e) Each laboratory was randomly allocated a unique code number for the

program to ensure confidentiality of results. Reference to each laboratory in this report is by code number only. Please note that a number of laboratories reported more than one set of results and, therefore, their code numbers (with letter) could appear several times in the same data set.

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(f) Results (as reported by participants) with corresponding summary statistics (i.e. number of results, median, uncertainty of the median, normalised interquartile range, robust coefficient of variation, minimum, maximum and range) are presented in Appendix A (for each sample and for each of the analyses performed). Measurement Uncertainty (MU) is also presented where supplied by participants. Please note that this information is presented for information purposes only and has not been used for the formal evaluation of results.

(g) A robust statistical approach, using z-scores, was utilised to assess

laboratories’ testing performance (see Section 4). Robust z-scores and z-score charts relevant to each test are presented in Appendix A.

(h) The document entitled Guide to Proficiency Testing Australia, 2014 (reference

[1]) defines the statistical terms and details the statistical procedures referred to in this report.

(i) A tabulated listing of laboratories (by code number) identified as having outlier

results can be found on page 10. 3. FORMAT OF THE APPENDICES (a) Appendix A contains the analysis of results reported by laboratories for the

samples. This section contains the following for each determinant, where appropriate: - a table of results and calculated z-scores;

- a list of summary statistics; and

- ordered z-score charts.

(b) Appendix B contains details of the homogeneity testing. (c) Appendix C contains copies of the Instructions to Participants and Results

Sheet. 4. STATISTICAL DESIGN OF THE PROGRAM (a) Outlier Results and Z-scores In order to assess laboratories’ testing performance, a robust statistical

approach, using z-scores, was utilised. Z-scores give a measure of how far a result is from the consensus value (i.e. the median), and gives a "score" to each result relative to the other results in the group.

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A z-score close to zero indicates that the result agrees well with those from other laboratories. Whereas, a z-score with an absolute value greater than or equal to 3.0 is considered to be an outlier and is marked by the symbol “§”.

(b) Results Tables and Summary Statistics Each of these tables contains the results returned by each laboratory,

including the code number for the method used, and the robust z-score calculated for each result.

Results have been entered exactly as reported by participants. That is,

laboratories which did not report results to the precision (i.e. number of decimal places) requested on the Results Sheet have not been rounded to the requested precision before being included in the statistical analysis.

A list of summary statistics appears at the bottom of each of the tables of results and consists of:

- the number of results for that test/sample (No. of Results);

- the median of these results, i.e. the middle value (Median);

- the uncertainty of the median; a robust estimate of the standard deviation of the Median;

- the normalised interquartile range of the results (Normalised IQR);

- the robust coefficient of variation, expressed as a percentage (Robust CV) - i.e. 100 x Normalised IQR / Median;

- the minimum and maximum laboratory results; and

- the range (Maximum - Minimum).

The median is a measure of the centre of the data. The normalised IQR is a measure of the spread of the results. It is calculated by multiplying the interquartile range (IQR) by a correction factor which converts the IQR to an estimate of the standard deviation. The IQR is the difference between the upper and lower quartiles (i.e. the values above and below which a quarter of the results lie, respectively). For normally distributed data, the uncertainty of the median is approximated by:

n = number of results Please see reference [1] for further details on these robust summary statistics.

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(c) Ordered Z-Score Charts On these charts each laboratory's robust z-score is shown, in order of

magnitude, and is marked with its code number. From these charts, each laboratory can readily compare its performance relative to the other laboratories.

These charts contain solid lines at +3.0 and -3.0, so that outliers are clearly

identifiable as those laboratories whose "bar" extends beyond these "cut-off" lines. The y-axis of these charts has been limited, so very large z-scores appear to extend beyond the chart boundary.

Further details of the construction and interpretation of these diagrams is given

in reference [1]. Please also refer to this document for a glossary of terms.

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The following table summarises the results submitted by participants for the program.

TABLE A: SUMMARY STATISTICS

Test No. of Results Median Normalised IQR

Particle Density and Water Absorption of Course

Aggregate

Apparent Particle Density (nearest 0.01 t/m3) 39 2.707 0.009

Particle Density on a Dry Basis (nearest 0.01 t/m3) 40 2.670 0.011

Particle Density on a Saturated-Surface-Dry Basis (nearest 0.01 t/m3)

40 2.681 0.009

Water Absorption (nearest 0.1%) 40 0.50 0.06

Particle Size Distribution (individual percent retained to

nearest 0.1%)

26.5 mm 42 Not calculated

19.0 mm 42 Not calculated

13.2 mm 45 17.10 2.89

9.5 mm 45 68.30 2.30

6.7 mm 44 10.63 1.91

4.75 mm 44 0.60 0.24

Flakiness Index (nearest 1%)

37 12.0 2.2

Dry Strength at Nominated Load (nearest 0.1%) 37 9.4 1.6

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5. PTA AND TECHNICAL ADVISER’S COMMENTS General Comments For this round, of the 51 participating laboratories, 2 laboratories could not submit results in time for inclusion in the final report. A total of 411 results were returned for z-score analysis. Of these, 39 results were outliers, which constitutes 9.5% of the total number of results submitted. Particle Density and Water Absorption of Course Aggregate Laboratories receiving outliers are reminded to check their processes, in particular laboratories 6, 20, 25, 26, 40, 45, 46A, 46B and 72. Laboratory 68 result for Apparent Particle Density was omitted from the consensus due to an error in reporting. A target CV was used to make adjustments to results for Particle Density on a Dry Basis and for Particle Density on a Saturated-Surface-Dry Basis. Adjustments made to the CV for Apparent Particle Density had no effect on the z-scores or summary statistics. These were adjusted according to the Queensland Department of Main Roads Method Q214B reproducibility guidelines. Laboratories were advised via email (on 19/05/2015) to submit results to 3 decimal places. Unfortunately not all laboratories did this so results were rounded to 2 decimal places where required. For future rounds laboratories will be asked to submit results to 3 decimal places. At 2 decimal places, graphs are showing a non-continuous display which we believe could affect the analysis of results. Reporting results to 3 decimal places could filter out borderline outliers and increase the accuracy of statistical analyses. Particle Size Distribution For Particle Size Distribution (PSD) at 26.5 mm and 19.0 mm, statistical analysis could not be performed as the results did not follow a normal distribution. Overall, performance in PSD was good. All laboratories reporting outlier results are strongly encouraged to check their procedures. It is important that those laboratories that have questionable results, i.e. a z-score 2.0< |z-score| <3.0, also review their procedures. Results submitted by laboratories 32 and 63 were omitted from the consensus as the results were not reported in the correct units. Flakiness Index and Dry Strength Loss at Nominated Load All results reported were satisfactory with only a few outliers for each test.

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Metrological Traceability and Measurement Uncertainty of Assigned Values Consensus values (median) derived from participants’ results are used in this program. These values are not metrologically traceable to an external reference. A nominal 20 mm sized aggregate supplied from a quarry was used for the Aggregates Round 14 program. This sample was prepared according to standard AS 1141.3.1, paragraphs 6.4.2 and 6.4.3. As the assigned value for each test in this program is the median of the results submitted by the participants, the uncertainty of the median has been calculated and is presented in the summary statistics tables of Appendix A.

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TABLE B: COMPARISON OF ROBUST CVS AND PERCENTAGE OF OUTLIERS

Test

Apparent Particle Density

(nearest 0.01 t/m 3)

Particle Density on a Dry Basis (nearest 0.01

t/m 3)

Particle Density on a Saturated-

Surface-Dry Basis (nearest 0.01 t/m 3)

Water Absorption

(nearest 0.1%)


Dry Strength at Nominated Load (nearest 0.1%)

Round Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Aggregates 14 0.3% 23.1 0.4% 20.0 0.4% 22.5 12.6% 15.0 18.5% 5.4 17.3% --

Aggregates 13 0.3% 13.5 0.4% 19.4 0.4% 19.4 24.7% 8.3 18.5% 2.4 -- --

Aggregates 12 0.3% 4.4 0.4% 2.2 0.4% 2.2 8.2% 4.4 17.1% -- 10.3% --

Particle Size Distribution (individual

percent retained to

nearest 0.1%)

13.2 mm 9.5 mm 6.7 mm 4.75 mm

Round Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Aggregates 14 16.9% 2.0 3.4% 4.4 18.0% 2.3 40.2% 2.3

Aggregates 13 9.8% 4.3 8.9% -- 22.9% 2.1 53.0% --

Aggregates 12 5.7% 5.0 8.1% 5.0 na na 27.1% 16.7

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Analysis of Results by Method Groups Grouped analysis was performed for methods appearing greater than or equal to 11 times in each test. The results are tabulated below.

Test Grouped Method

No. of Results Median

Uncertainty of the

Median Particle Density and Water

Absorption of Course Aggregate

Apparent Particle Density (nearest 0.01 t/m3) AS 1141.6.1 32 2.702 0.003

Particle Density on a Dry Basis (nearest 0.01 t/m3) AS 1141.6.1 33 2.670 0.005

Particle Density on a Saturated-Surface-Dry Basis

(nearest 0.01 t/m3) AS 1141.6.1 33 2.680 0.002

Water Absorption (nearest 0.1%) AS 1141.6.1 33 0.50 0.01

Particle Size Distribution (individual percent retained

to nearest 0.1%)

13.2 mm AS 1141.11 & AS 1141.11.1 37 17.10 0.61

9.5 mm AS 1141.11 & AS 1141.11.1 37 68.20 0.46

6.7 mm AS 1141.11 & AS 1141.11.1 37 10.60 0.41

4.75 mm AS 1141.11 & AS 1141.11.1 37 0.60 0.06


AS 1141.15 29 11.0 0.3

Dry Strength at Nominated Load (nearest 0.1%) AS 1141.22 27 9.30 0.38

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6. OUTLIER RESULTS

Laboratories reporting outlier results are listed in the following table:

TABLE C: SUMMARY OF STATISTICAL OUTLIERS

Test Laboratory Code No.

Particle Density and Water Absorption of Course Aggregate

Apparent Particle Density (nearest 0.01 t/m3)

6, 20, 25, 26, 40, 45, 46A, 46B, 72

Particle Density on a Dry Basis (nearest 0.01 t/m3)

6, 20, 25, 26, 40, 45, 46A, 72


(nearest 0.01 t/m3)

6, 20, 25, 26, 40, 45, 46A, 46B, 72

Water Absorption (nearest 0.1%) 10, 25, 26, 45, 57, 64

Particle Size Distribution (individual percent retained to nearest 0.1%)

13.2 mm 72

9.5 mm 20, 39

6.7 mm 72

4.75 mm 38


12, 28

Dry Strength at Nominated Load (nearest 0.1%) --

7. REFERENCES

[1] Guide to Proficiency Testing Australia, 2014 (This document can be found on the PTA website, www.pta.asn.au)

[2] AS 1141.3.1 - 2012 Methods for sampling and testing aggregates - Sampling - Aggregates.

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APPENDIX A

Results and Data Analysis

Apparent Particle Density (nearest 0.01 t/m3)..........................................................…A1

Particle Density on a Dry Basis (nearest 0.01 t/m3)..................................................…A2

Particle Density on a Saturated-Surface-Dry Basis (nearest 0.01 t/m3)....................…A4

Water Absorption (nearest 0.1%).............................................................................…A5

Particle Size Distribution (nearest 0.1%)..................................................................…A7

Flakiness Index (nearest 1%).................................................................................. …A15

Dry Strength at Nominated Load (nearest 0.1%)..................................................... …A16

A1

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Apparent Particle Density (nearest 0.01 t/m 3)

Laboratory Code Result Robust

z-score Method

6 2.65 -6.69 § AS 1141.6.1

7 2.697 -1.17 AS 1141.6.1

10 2.70 -0.82 AS 1141.6.1

11 2.71 0.35 AS 1141.6.1

12 2.705 -0.23 ASTM C127

15 2.71 0.35 AS 1141.6.1

16 2.708 0.12 ASTM C127

18 2.71 0.35 AS 1141.6.1

19 2.707 0.00 AS 1141.6.1

20 2.763 6.57 § AS 1141.6.1

22A 2.69 -1.99 AS 1141.6.1

22B 2.70 -0.82 AS 1141.6.1

24 2.711 0.47 AS 1141.6.1

25 2.672 -4.11 § AS 1141.6.1

26 2.66 -5.51 § AS 1141.6.1

28 2.70 -0.82 AS 1141.6.1

30 2.70 -0.82 AS 1141.6.1

32 2.711 0.47 MS EN 1097 Part 6:2011

33 2.726 2.23 AS 1141.6.1

34 2.703 -0.47 AS 1141.6.1

38 2.71 0.35 AS 1141.6.1

39 2.70 -0.82 ASTM C127 2012

40 2.61 -11.38 § AS 1141.6.1

41 2.710 0.35 AS 1141.6.1

43 2.710 0.35 AS 1141.6.1

45 2.80 10.91 § AS 1141.6.1

46A 2.66 -5.51 § AS 1141.6.1

46B 2.67 -4.34 § AS 1141.6.1

48 2.71 0.35 ASTM C127

49 2.709 0.23 AS 1141.6.1

57 2.71 0.35 #

Apparent Particle Density (nearest 0.01 t/m 3)


z-score Method

63 2.72 1.52 AS 1141.6.1

64 2.70 -0.82 AS 1141.6.1

66 2.69 -1.99 AS 1141.6.1

67 2.71 0.35 AS 1141.6.1

68 1.52* na AS 1141.6.1 - 2000

70 2.708 0.12 AS 1141.6.1

72 2.58 -14.90 § AS 1141.6.1

76 2.70 -0.82 AS 1141.6.1

80 2.71 0.35 KS F 2503 (2014)

No. of

Results 39

Median 2.707

Normalised IQR

0.009

Robust CV 0.3%

Uncertainty of median

0.002

Minimum 2.58

Maximum 2.80

Range 0.22

Notes: A “§” indicates an outlier i.e. |z-score| ≥ 3.0. A “#” indicates no response was provided. A “*” indicates result was not included in the consensus. na indicates not applicable.

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Particle Density on a Dry Basis (nearest 0.01 t/m 3)


z-score Method

6 2.62 -3.37 § AS 1141.6.1

7 2.660 -0.94 AS 1141.6.1

10 2.69 1.87 AS 1141.6.1

11 2.68 0.94 AS 1141.6.1

12 2.673 0.28 ASTM C127

15 2.68 0.94 AS 1141.6.1

16 2.680 0.94 ASTM C127

18 2.67 0.00 AS 1141.6.1

19 2.668 -0.19 AS 1141.6.1

20 2.733 5.90 § AS 1141.6.1

22A 2.65 -1.87 AS 1141.6.1

22B 2.66 -0.94 AS 1141.6.1

24 2.689 1.78 AS 1141.6.1

25 2.627 -4.03 § AS 1141.6.1

26 2.61 -5.62 § AS 1141.6.1

28 2.67 0.00 AS 1141.6.1

30 2.67 0.00 AS 1141.6.1

32 2.685 1.40 MS EN 1097 Part 6:2011

33 2.677 0.66 AS 1141.6.1

34 2.670 0.00 AS 1141.6.1

38 2.67 0.00 AS 1141.6.1

39 2.67 0.00 ASTM C127 2012

40 2.57 -9.36 § AS 1141.6.1

41 2.672 0.19 AS 1141.6.1

43 2.676 0.56 AS 1141.6.1

45 2.74 6.55 § AS 1141.6.1

46A 2.63 -3.75 § AS 1141.6.1

46B 2.64 -2.81 AS 1141.6.1

48 2.68 0.94 ASTM C127

49 2.676 0.56 AS 1141.6.1

57 2.67 0.00 #

Particle Density on a Dry Basis (nearest 0.01 t/m 3)


z-score Method

63 2.68 0.94 AS 1141.6.1

64 2.68 0.94 AS 1141.6.1

66 2.65 -1.87 AS 1141.6.1

67 2.67 0.00 AS 1141.6.1

68 2.69 1.87 AS 1141.6.1 - 2000

70 2.668 -0.19 AS 1141.6.1

72 2.60 -6.55 § AS 1141.6.1

76 2.67 0.00 AS 1141.6.1

80 2.67 0.00 KS F 2503 (2014)

No. of

Results 40

Median 2.670

Normalised IQR

0.011

Robust CV 0.4%


0.002

Minimum 2.57

Maximum 2.74

Range 0.17

Notes: A “§” indicates an outlier i.e. |z-score| ≥ 3.0. A “#” indicates no response was provided.

A3

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A4

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(nearest 0.01 t/m 3) Laboratory

Code Result Robust z-score Method

6 2.63 -5.44 § AS 1141.6.1

7 2.674 -0.75 AS 1141.6.1

10 2.70 2.02 AS 1141.6.1

11 2.69 0.96 AS 1141.6.1

12 2.685 0.43 ASTM C127

15 2.69 0.96 AS 1141.6.1

16 2.691 1.07 ASTM C127

18 2.68 -0.11 AS 1141.6.1

19 2.682 0.11 AS 1141.6.1

20 2.744 6.71 § AS 1141.6.1

22A 2.67 -1.17 AS 1141.6.1

22B 2.67 -1.17 AS 1141.6.1

24 2.677 -0.43 AS 1141.6.1

25 2.644 -3.94 § AS 1141.6.1

26 2.62 -6.50 § AS 1141.6.1

28 2.68 -0.11 AS 1141.6.1

30 2.68 -0.11 AS 1141.6.1

32 2.697 1.71 MS EN 1097 Part 6:2011

33 2.695 1.49 AS 1141.6.1

34 2.682 0.11 AS 1141.6.1

38 2.69 0.96 AS 1141.6.1

39 2.68 -0.11 ASTM C127 2012

40 2.59 -9.70 § AS 1141.6.1

41 2.686 0.53 AS 1141.6.1

43 2.688 0.75 AS 1141.6.1

45 2.76 8.42 § AS 1141.6.1

46A 2.64 -4.37 § AS 1141.6.1

46B 2.65 -3.30 § AS 1141.6.1

48 2.69 0.96 ASTM C127

49 2.688 0.75 AS 1141.6.1

57 2.68 -0.11 #


(nearest 0.01 t/m 3)


z-score Method

63 2.70 2.02 AS 1141.6.1

64 2.68 -0.11 AS 1141.6.1

66 2.67 -1.17 AS 1141.6.1

67 2.68 -0.11 AS 1141.6.1

68 2.70 2.02 AS 1141.6.1 - 2000

70 2.683 0.21 AS 1141.6.1

72 2.63 -5.44 § AS 1141.6.1

76 2.68 -0.11 AS 1141.6.1

80 2.69 0.96 KS F 2503 (2014)

No. of

Results 40

Median 2.681

Normalised IQR

0.009

Robust CV 0.4%


0.002

Minimum 2.59

Maximum 2.76

Range 0.17


A5

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Water Absorption (nearest 0.1%)


z-score Method

6 0.5 0.00 AS 1141.6.1

7 0.521 0.33 AS 1141.6.1

10 0.2 -4.75 § AS 1141.6.1

11 0.4 -1.58 AS 1141.6.1

12 0.440 -0.95 ASTM C127

15 0.44 -0.95 AS 1141.6.1

16 0.4 -1.58 ASTM C127

18 0.5 0.00 AS 1141.6.1

19 0.534 0.54 AS 1141.6.1

20 0.402 -1.55 AS 1141.6.1

22A 0.6 1.58 AS 1141.6.1

22B 0.6 1.58 AS 1141.6.1

24 0.472 -0.44 AS 1141.6.1

25 0.7 3.16 § AS 1141.6.1

26 0.7 3.16 § AS 1141.6.1

28 0.5 0.00 AS 1141.6.1

30 0.5 0.00 AS 1141.6.1

32 0.436 -1.01 MS EN 1097 Part 6:2011

33 0.665 2.61 AS 1141.6.1

34 0.5 0.00 AS 1141.6.1

38 0.5 0.00 AS 1141.6.1

39 0.5 0.00 ASTM C127 2012

40 0.6 1.58 AS 1141.6.1

41 0.5 0.00 AS 1141.6.1

43 0.5 0.00 AS 1141.6.1

45 0.8 4.75 § AS 1141.6.1

46A 0.5 0.00 AS 1141.6.1

46B 0.4 -1.58 AS 1141.6.1

48 0.5 0.00 ASTM C127

49 0.4 -1.58 AS 1141.6.1

57 0.0 -7.91 § #

Water Absorption (nearest 0.1%)


z-score Method

63 0.5 0.00 AS 1141.6.1

64 0.3 -3.16 § AS 1141.6.1

66 0.5 0.00 AS 1141.6.1

67 0.5 0.00 AS 1141.6.1

68 0.4 -1.58 AS 1141.6.1 - 2000

70 0.553 0.84 AS 1141.6.1

72 0.6 1.58 AS 1141.6.1

76 0.5 0.00 AS 1141.6.1

80 0.52 0.32 KS F 2503 (2014)

No. of

Results 40

Median 0.50 Normalised

IQR 0.06

Robust CV 12.6% Uncertainty of median 0.01

Minimum 0.0

Maximum 0.8

Range 0.8


A6

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A7

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Particle Size Distribution (nearest 0.1%)

Laboratory Code 26.5 mm 19.0 mm 13.2 mm Robust

z-score Method

3A 0.0 0.0 18.8 0.59 AS 1141.11.1 3B 0.0 0.0 18.5 0.48 AS 1141.11.1 6 0 0 15.2 -0.66 AS 1141.11 7 0 0 17 -0.03 AS 1141.11.1

10 0.0 0.0 17.2 0.03 AS 1141.11 11 0.0 0.0 17.8 0.24 AS 1141.11.1 12 # # 23.0 2.04 ASTM C136 15 0.0 0.0 18.2 0.38 AS 1141.11 16 0.0 0.0 15.4 -0.59 ASTM C136/C136M 18 0 0 15.2 -0.66 AS 1141.11

19 0 0 21.4 1.49 AS 1141.11 (Washed)

20 0.0 0.0 21.9 1.66 AS 1141.11 22A 0.0 0.0 20.3 1.11 AS 1141.11.1 22B 0.0 0.0 17.1 0.00 AS 1141.11.1 24 0.0 0.0 20.6 1.21 AS 1141.11.1

25 0.0 0.0 14.3 -0.97 AS 1141.11 (Washed)

26 0.0 0.0 16.8 -0.10 AS 1141.11 (Washed)

28 0.0 0.0 16.7 -0.14 AS 1141.11.1 30 0.0 0.0 16.0 -0.38 AS 1141.11

31 0.0 0.0 24.5 2.56 AS 1141.11.1 (Washed)

32 100 100 83.4* na MS EN 933.1:2011

33 0.0 0.0 16.5 -0.21 AS 1141.11

34 0.0 0.0 14.9 -0.76 AS 1141.11.1

38 0 0 19.6 0.86 AS 1141.11

39 0.0 0.0 18.3 0.42 NZS 4407:1991 Test 3.8.1

40 0 0 15.3 -0.62 AS 1141.11

41 # # 16.0 -0.38 AS 1141.11.1

43 0.0 0.0 12.9 -1.45 AS 1141.11

45 0 0 13.9 -1.11 AS 1141.11

46A 0 0 15.20 -0.66 Q103B

46B 0 0 16.4 -0.24 Q103B

49 0.0 0.0 19.4 0.80 AS 1141.11 Washed

54 0.0 0.0 19.3 0.76 AS 1141.11

57 0 0 15 -0.73 #

62 0.0 0.0 20.6 1.21 AS 1141.11.1

63 0 0 17.1* na AS 1141.11.1

64 # # 18.1 0.35 AS 1141.11.1

65 # # 19.0 0.66 Q103A

66 0 0 22 1.69 AS 1141.11.1

A8

SD 2.12.09

Notes: A “§” indicates an outlier i.e. |z-score| ≥ 3.0. A “#” indicates no response was provided. A “*” indicates result was not included in the consensus. “na” indicates not applicable.


Laboratory Code 26.5 mm 19.0 mm 13.2 mm Robust

z-score Method

67 0.0 0.0 14.7 -0.83 AS 1141.11.1

68 0.0 0.0 15.8 -0.45 AS 1141.11-1996

69 0.0 0.0 19.1 0.69 #

70 # # 14.0 -1.07 AS 1141.11.1

72 0.0 0.0 30.2 4.53 § AS 1141.11 (Washed)

75 0.0 0.0 19.2 0.73 AS 1141.11

76 0.0 0.0 15.4 -0.59 AS 1141.11.1

78 0.0 0.0 15.7 -0.48 AS 1141.11.1

No. of Results:

42 42 45

Median: 17.10 Normalised

IQR: 2.89

Robust CV: 16.9% Uncertainty of median:

0.54

Minimum: 12.9

Maximum: 30.2

Range: 17.3

A9

SD 2.12.09

A10

SD 2.12.09


Laboratory Code 9.5 mm Robust

z-score 6.7 mm Robust z-score 4.75 mm Robust

z-score Method

3A 68.2 -0.04 9.4 -0.64 0.4 -0.83 AS 1141.11.1 3B 68.2 -0.04 9.9 -0.38 0.4 -0.83 AS 1141.11.1 6 70.9 1.13 12.9 1.19 0.8 0.83 AS 1141.11 7 64 -1.87 15 2.29 1 1.66 AS 1141.11.1

10 68.3 0.00 9.7 -0.49 0.4 -0.83 AS 1141.11 11 69.2 0.39 8.3 -1.22 0.4 -0.83 AS 1141.11.1 12 62.2 -2.65 # # 10.8* na ASTM C136 15 72.4 1.78 8.3 -1.22 0.4 -0.83 AS 1141.11 16 68.2 -0.04 12.1 0.77 0.7 0.42 ASTM C136/C136M 18 66.0 -1.00 13.9 1.71 0.3 -1.25 AS 1141.11

19 64.1 -1.83 10.6 -0.02 0.8 0.83 AS 1141.11 (Washed)

20 60.9 -3.22 § 12.0 0.72 1.0 1.66 AS 1141.11 22A 66.9 -0.61 10.0 -0.33 0.4 -0.83 AS 1141.11.1 22B 68.4 0.04 11.3 0.35 0.5 -0.42 AS 1141.11.1 24 68.1 -0.09 7.7 -1.53 0.4 -0.83 AS 1141.11.1

25 69.1 0.35 13.1 1.29 0.6 0.00 AS 1141.11 (Washed)

26 69.4 0.48 10.2 -0.23 0.4 -0.83 AS 1141.11 (Washed)

28 69.4 0.48 9.4 -0.64 0.9 1.25 AS 1141.11.1 30 67.4 -0.39 13.1 1.29 0.7 0.42 AS 1141.11

31 63.1 -2.26 10.9 0.14 0.8 0.83 AS 1141.11.1 (Washed)

32 15.9* na 4.4* na 3.8* na MS EN 933.1:2011

33 66.2 -0.91 13.0 1.24 0.5 -0.42 AS 1141.11

34 68.8 0.22 12.5 0.98 0.6 0.00 AS 1141.11.1

38 66.1 -0.96 10.3 -0.17 4.8 17.43 § AS 1141.11

39 59.8 -3.70 § 15.7 2.66 0.8 0.83 NZS 4407:1991 Test 3.8.1

40 74.4 2.65 9.1 -0.80 0.8 0.83 AS 1141.11

41 67.0 -0.57 13.0 1.24 0.9 1.25 AS 1141.11.1

43 67.2 -0.48 15.8 2.71 0.9 1.25 AS 1141.11

45 70.2 0.83 11.7 0.56 0.5 -0.42 AS 1141.11

46A 70.74 1.06 10.66 0.02 0.50 -0.42 Q103B

46B 68.6 0.13 11.1 0.25 0.7 0.42 Q103B

49 66.2 -0.91 10.0 -0.33 0.5 -0.42 AS 1141.11 Washed

54 68.4 0.04 10.0 -0.33 0.7 0.42 AS 1141.11

57 71 1.17 10 -0.33 1 1.66 #

62 66.0 -1.00 9.8 -0.43 0.6 0.00 AS 1141.11.1

63 84.2* na 95.7* na 96.2* na AS 1141.11.1

64 66.1 -0.96 11.2 0.30 0.4 -0.83 AS 1141.11.1

65 68.4 0.04 8.9 -0.91 0.6 0.00 Q103A

66 61.7 -2.87 12 0.72 0.7 0.42 AS 1141.11.1

A11

SD 2.12.09

Notes: A “§” indicates an outlier i.e. |z-score| ≥ 3.0. A “#” indicates no response was provided. A “*” indicates result was not included in the consensus. “na” indicates not applicable.


Laboratory Code 9.5 mm Robust

z-score 6.7 mm Robust z-score 4.75 mm Robust

z-score Method

67 68.8 0.22 12.3 0.87 0.6 0.00 AS 1141.11.1

68 72.6 1.87 10.6 -0.02 0.7 0.42 AS 1141.11-1996

69 72.2 1.70 7.9 -1.43 0.5 -0.42 #

70 68.4 0.04 13.4 1.45 0.7 0.42 AS 1141.11.1

72 63.6 -2.05 4.5 -3.21 § 0.3 -1.25 AS 1141.11 (Washed)

75 69.0 0.30 9.1 -0.80 0.5 -0.42 AS 1141.11

76 71.5 1.39 10.1 -0.28 0.5 -0.42 AS 1141.11.1

78 69.1 0.35 11.1 0.25 0.7 0.42 AS 1141.11.1

No. of Results:

45 44 44

Median: 68.30 10.63 0.60

Normalised IQR:

2.30 1.91 0.24

Robust CV: 3.4% 18.0% 40.2%

Uncertainty of median:

0.43 0.36 0.05

Minimum: 59.8 4.5 0.3

Maximum: 74.4 15.8 4.8

Range: 14.6 11.3 4.5

A12

SD 2.12.09

A13

SD 2.12.09

A14

SD 2.12.09

A15

SD 2.12.09



z-score Method

3A 13 0.45 AS1141.15 3B 10 -0.90 AS1141.15 7 11.0 -0.45 AS 1141.15

11 11 -0.45 AS 1141.15 12 1.0 -4.95 § ASTM D4791

16 12 0.00 BS 812:Part 105.1

18 10 -0.90 AS 1141.15 19 12 0.00 AS 1141.15 20 14 0.90 AS 1141.15

22A 11 -0.45 AS 1141.15 22B 11 -0.45 AS 1141.15 24 13 0.45 AS 1141.15 25 9 -1.35 AS 1141.15 26 11 -0.45 AS 1141.15 28 5 -3.15 § AS 1141.15 30 9 -1.35 AS 1141.15

32 12 0.00 BS 812 Section

105.1:1990 34 15 1.35 AS 1141.15

38 12 0.00 AS 1141.15

39 11 -0.45 AS 1141.15 1999

40 7 -2.25 AS 1141.15

41 13.9 0.85 AS 1141.15

43 13 0.45 AS 1141.15

45 11 -0.45 AS 1141.15

46A 7 -2.25 Q201

46B 10 -0.90 Q201

57 15 1.35 #

63 13 0.45 AS 1141.15

64 12 0.00 AS 1141.15

65 12 0.00 Q201

66 12.0 0.00 AS 1141.15



z-score Method

67 10 -0.90 AS 1141.15

68 13 0.45 AS 1141.15-1999

69 16.0 1.80 #

70 11 -0.45 AS 1141.15

72 17 2.25 AS 1141.15

76 14.2 0.99 AS 1141.15

No. of

Results 37

Median 12.0

Normalised IQR

2.2

Robust CV 18.5%


0.5

Minimum 1

Maximum 17

Range 16


A16

SD 2.12.09

Dry Strength Loss at Nominated Load (nearest 0.1%)


z-score Method

3A 11.1 1.04 AS1141.22 3B 11.4 1.23 AS1141.22 7 8.8 -0.37 AS1141.22

10 6.4 -1.84 AS1141.22 11 9.6 0.12 AS1141.22 15 7.7 -1.04 AS1141.22

16 7.5 -1.17 BS812:Part 110

18 8.7 -0.43 AS1141.22 19 9.5 0.06 AS1141.22

20 8.1 -0.80 AS1141.22-6.2

24 10.9 0.92 AS1141.22 25 7.8 -0.98 AS1141.22 30 10.4 0.61 AS 1141.22 31 8.9 -0.31 AS 1141.22

33 10.7 0.80 AS 1141.22

34 11.9 1.53 AS 1141.22

38 9.4 0.00 AS 1141.22

39 6.8 -1.59 NZS

4407:1991 Test 3.10

40 9.9 0.31 AS 1141.22 (Part 6.2)

41 7.5 -1.17 AS 1141.22

43 9.3 -0.06 AS 1141.22

46A 11.3 1.17 Q205A

46B 10.0 0.37 Q205A

49 8.6 -0.49 AS 1141.22 (Dry)

57 9.4 0.00 #

62 8.0 -0.86 AS 1141.22

63 8.3 -0.67 AS 1141.22

64 10.8 0.86 AS 1141.22

65 9.8 0.25 Q205A

66 9.0 -0.25 AS 1141.22

Dry Strength Loss at Nominated Load (nearest 0.1%)


z-score Method

67 9.5 0.06 AS 1141.22

68 10.1 0.43 AS 1141.22-2008 (6.2)

69 11.1 1.04 #

70 8.2 -0.74 AS 1141.22-

6.2 Dry Cond. Only

72 9.1 -0.18 AS 1141.22

75 7.8 -0.98 AS 1141.22

76 11.6 1.35 AS 1141.22

No. of

Results 37

Median 9.4

Normalised IQR

1.6

Robust CV 17.3%


0.3

Minimum 6.4

Maximum 12

Range 5.5

Note: A “#” indicates no response was provided.

A17

SD 2.12.09

SD 2.12.09

APPENDIX B

Homogeneity Testing

B1

SD 2.12.09

Homogeneity Testing

Aggregate Round 14 - Proficiency Testing Homogenei ty Results

Sample no. Individual Percent Retained

(AS Sieve Size in mm) - AS 1141.11 Flakiness Index (%)

Dry Strength

(%)

Apparent Particle Density (t/m 3)

Particle Density

Dry (t/m 3)

SSD Particle Density (t/m 3)

Water Absorption

(%) 19.0 mm 13.2 mm 9.5 mm 4.75 mm

77 17.2 67.7 11.1 0.5 15.0 10.1 2.707 2.670 2.684 0.5

62 15.0 71.3 10.0 0.4 14.7 10.0 2.705 2.669 2.682 0.5

34 15.7 70.8 9.2 0.5 14.9 10.2 2.703 2.667 2.680 0.5

32 16.1 69.3 9.7 0.7 15.0 10.2 2.705 2.666 2.681 0.5

17 15.8 70.0 10.5 0.7 14.9 10.3 2.713 2.674 2.689 0.5

1 17.6 68.0 9.8 0.5 15.0 9.8 2.708 2.671 2.685 0.5

60 16.3 67.1 10.9 0.9 14.5 9.9 2.706 2.669 2.682 0.5

48 17.3 69.0 9.2 0.5 15.0 10.1 2.705 2.666 2.681 0.5

Mean 16.4 69.2 10.1 0.6 14.9 10.1 2.707 2.669 2.683 0.5 Standard Deviation 0.91 1.50 0.72 0.16 0.18 0.17 0.003 0.003 0.003 0.000

Coefficient of Variation 0.056 0.022 0.072 0.268 0.012 0.017 0.001 0.001 0.001 0.000

Lowest Value 15.0 67.1 9.2 0.4 14.5 9.8 2.703 2.666 2.680 0.5

Highest Value 17.6 71.3 11.1 0.9 15.0 10.3 2.713 2.674 2.689 0.5

SD 2.12.09

APPENDIX C

Documentation

Instructions to Participants ……………………………………………………………… C1

Results Sheet ……………………………………………………………………………. C2

C1

SD 2.12.09

PROFICIENCY TESTING AUSTRALIA AGGREGATES (ROUND 14) PROFICIENCY TESTING PROGRAM INSTRUCTIONS TO PARTICIPANTS To ensure that results from this program can be analysed properly, participants are asked to adhere carefully to the following instructions. 1. One 13 Kg sample of aggregate has been supplied to each laboratory. 2. Before any testing, mix the sample and then cone and quarter or rifle

thoroughly using the whole sample. 3. The following determinations are to be performed on the sample:

• Particle Density and Water Absorption of Course Aggregate –AS1141.6.1 • Particle Size Distribution – AS 1141.11 (washed), perform the test on 26.5mm,

19.0mm, 13.2mm, 9.5mm, 6.7mm and 4.75mm sieves. • Flakiness Index – AS1141.15 • Dry Strength – AS1141.22 (Part 6.2, dry condition only, 13.2 - 9.5mm size

fraction at supplied test load (270kN). 1 point only. 4. Laboratories routinely performing these tests to other methods are required to

follow their normal method and note this on the results sheet. 5. The results for all determinations are to be recorded on the results sheet to the

accuracy and reporting basis indicated on the results sheet. The method used is also to be recorded.

6. Testing may commence as soon as the sample is received. All laboratories

must return the results sheet no later than 5 June 2015 to: Laura Galbraith Proficiency Testing Australia Fax: 02 9743 6664 Email: [email protected]

C2

SD 2.12.09

PROFICIENCY TESTING AUSTRALIA AGGREGATES (ROUND 14) PROFICIENCY TESTING PROGRAM

RESULTS SHEET Lab Code

TEST

(report to) Result Method

Particle density and water absorption of course aggregate

Apparent particle density (nearest 0.01 t/m3)

Particle density on a dry basis

(nearest 0.01 t/m3)

Particle density on a saturated-surface-dry basis

(nearest 0.01 t/m3)

Water absorption (nearest 0.1%)

Particle Size Distribution (INDIVIDUAL PERCENT

RETAINED to nearest 0.1%)

26.5mm

19.0mm

13.2mm

9.5mm

6.7mm

4.75mm


Dry Strength loss @ nominated load (nearest 0.1%)

Date of tests: Signature: Please return by 5 June 2015 to: Laura Galbraith Fax: 02 9743 6664 Email: [email protected]

SD 2.12.09

- End of Report -

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Report No. 914 Aggregates Proficiency Testing Round 14 ... · PDF fileFlakiness Index (nearest 1%) ... - the robust coefficient of variation, expressed as a percentage ( Robust CV