Report No. 894 Aggregates Proficiency Testing Round 13 ...capeyork.myownserver.net/~ptaasnau/documents/894.pdf · Flakiness Index (nearest 1%) ... - the robust coefficient of variation,

Report No. 894

Aggregates Proficiency Testing

Round 13

January 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. We would also like to express our thanks to Mr V Livaditis, Boral Pty Ltd and Mr J Barry, Boral Pty Ltd for their assistance in sample acquisition.

© Copyright Proficiency Testing Australia, 2015

PO Box 7507 SILVERWATER NSW 2128, Australia

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 ................................................................................ 4

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

Table B: Comparison of Robust CVs and Percentage of Outliers ....................... 7

6. OUTLIER RESULTS ............................................................................................. 9

Table C: Summary of Statistical Outliers ............................................................. 9

7. REFERENCES ................................................................................................... 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%).................................................................................. …A17

Average Least Dimension (ALD) 10mm and greater (nearest 0.1 mm)....................…A18

Particle Shape by Proportional Caliper (nearest 1%)………………….......................…A19 APPENDIX B – Homogeneity Testing

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

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

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

1

1. FOREWORD

This report summarises the results of a proficiency testing program on the determination of mechanical tests of aggregate. It constitutes the thirteenth round of an ongoing series of programs. The program was conducted in November 2014 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 L 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 54 laboratories received samples, comprising:

- 52 Australian participants; and

- 2 overseas participants, including:

- Serbia (1); and - Qatar (1).

Of these 54 laboratories, 6 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.

(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

2

range) are presented in Appendix A (for each sample and for each of the analyses performed).

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

laboratories’ testing performance (see Section 3). 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 9. 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.

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

3

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).

Please see reference [1] for further details on these robust summary statistics.

(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.

4

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) 37 2.940 0.007

Particle Density on a Dry Basis (nearest 0.01 t/m3) 36 2.910 0.012

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

36 2.922 0.010

Water Absorption (nearest 0.1%) 36 0.30 0.07

Particle Size Distribution (individual percent retained to

nearest 0.1%)

26.5 mm 42 Not calculated

19.0 mm 47 2.90 0.93

13.2 mm 47 47.90 4.71

9.5 mm 47 41.00 3.63

6.7 mm 47 6.00 1.37

4.75 mm 47 0.70 0.37

2.36 mm 47 0.20 0.22

0.075 mm 44 0.20 0.15

Flakiness Index (nearest 1%)

42 12.0 2.2

Average Least Dimension (ALD) 10mm and greater (nearest 0.1 mm)

42 10.35 0.85

Particle Shape by Proportional Caliper (nearest 1%) 36 12.0 3.7

5

5. PTA AND TECHNICAL ADVISER’S COMMENTS General Comments For this round, of the 54 participating laboratories, 6 laboratories could not submit results in time for inclusion in the final report. One laboratory’s results were omitted from the consensus due to reporting errors in Particle Size Distribution. Thus the participating 48 laboratories returned a total of 633 results for z-score analysis. Of these, 35 results were outliers, which constitutes 5.5% 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 laboratory 59, which returned low results for all Particle Density of Course Aggregate tests. 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. Particle Size Distribution For Particle Size Distribution (PSD) at 26.5 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 laboratory 76 were omitted from the consensus as the results were not reported in the correct units. Flakiness Index, ALD and Particle Shape by Proportional Caliper All results reported were satisfactory with only a few outliers for each test.

6

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 13 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.

7

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%)


Average Least Dimension (ALD) 10mm and greater (nearest 0.1 mm)

Particle Shape by Proportional

Caliper (nearest 1%)

Round Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Aggregates 13 0.3% 13.5 0.4% 19.4 0.4% 19.4 24.7% 8.3 18.5% 2.4 8.2% 4.8 30.9% 2.8

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

Aggregates 11 0.3% 8.8 0.4% 8.8 0.4% 5.9 18.5% 5.9 15.9% -- 4.4% 3.0 21.8% 6.9

Particle Size Distribution (individual

percent retained to

nearest 0.1%)

19.0 mm 13.2 mm 9.5 mm 6.7 mm 4.75 mm 2.36 mm 0.075 mm

Round Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Aggregates 13 32.0% 8.5 9.8% 4.3 8.9% -- 22.9% 2.1 53.0% -- 111.2% 2.1 74.1% 2.3

Aggregates 12 22.2% 6.7 5.7% 5.0 8.1% 5.0 na na 27.1% 16.7 na na na na

Aggregates 11 56.7% 4.5 8.5% -- 7.7% 2.3 13.5% 2.8 21.2% 4.4 46.3% -- 37.1% --

8

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 26 2.940 0.002

Particle Density on a Dry Basis (nearest 0.01 t/m3) AS 1141.6.1 26 2.910 0.003

Particle Density on a Saturated-Surface-Dry Basis

(nearest 0.01 t/m3) AS 1141.6.1 26 2.925 0.003

Water Absorption (nearest 0.1%) AS 1141.6.1 26 0.40 0.02

Particle Size Distribution (individual percent retained

to nearest 0.1%)

19.0 mm AS 1141.11 & AS 1141.11.1 32 2.70 0.24

13.2 mm AS 1141.11 & AS 1141.11.1 32 47.25 1.13

9.5 mm AS 1141.11 & AS 1141.11.1 32 40.85 0.82

6.7 mm AS 1141.11 & AS 1141.11.1 32 5.90 0.31

4.75 mm AS 1141.11 & AS 1141.11.1 32 0.70 0.08

2.36 mm AS 1141.11 & AS 1141.11.1 32 0.20 0.04

0.075 mm AS 1141.11 & AS 1141.11.1 31 0.20 0.02


AS 1141.15 25 13.0 0.6

Average Least Dimension (ALD) 10mm and greater

(nearest 0.1 mm) AS 1141.20.1 24 9.90 0.12

Particle Shape by Proportional Caliper

(nearest 1%) AS 1141.14 33 12.0 0.8

9

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) 52, 59, 67, 69, 77

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

45, 52, 55, 59, 67, 69, 77


(nearest 0.01 t/m3)

45, 52, 55, 59, 67, 69, 77

Water Absorption (nearest 0.1%) 45, 55, 76

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

19.0 mm 6, 18, 50A, 77

13.2 mm 20, 34

9.5 mm --

6.7 mm 77

4.75 mm --

2.36 mm 2

0.075 mm 44


7

Average Least Dimension (ALD) 10 mm and greater

(nearest 0.1 mm) 17, 48

Particle Shape by Proportional Caliper (nearest 1%) 55

10

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.

[3] Q214B - 2013 Particle Density and Water Absorption of Aggregate (Coarse Fraction).

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%).................................................................................. …A17

Average Least Dimension (ALD) 10 mm and greater (nearest 0.1 mm)...................…A18

Particle Shape by Proportional Caliper (nearest 1%)………………….......................…A19

A1

Apparent Particle Density (nearest 0.01 t/m 3)

Laboratory Code Result Robust

z-score Method

3 2.94 0.00 AS 1141.6.1

6 2.94 0.00 AS 1141.6.1

7 2.94 0.00 AS 1141.6.1

13 2.95 1.35 AS 1141.6.1

15 2.93 -1.35 AS 1141.6.1

17 2.94 0.00 Q214B

18 2.94 0.00 AS 1141.6.1

19 2.93 -1.35 Q214B

25 2.94 0.00 AS 1141.6.1

27 2.94 0.00 Q109B

28 2.95 1.35 AS 1141.6.1

30 2.96 2.70 AS 1141.6.1

34 2.95 1.35 AS 1141.6.1

35 2.96 2.70 AS 1141.6.1

44 2.94 0.00 AS 1141.6.1

45 2.94 0.00 AS 1141.6.1

46A 2.94 0.00 AS 1141.6.1

46B 2.94 0.00 AS 1141.6.1

48 2.96 2.70 AS 1141.6.1

49 2.94 0.00 AS 1141.6.1

50A 2.942 0.27 Q214B

50B 2.939 -0.13 Q214B

52 2.97 4.05 § AS 1141.6.1

55 2.94 0.00 ASTM C127-12

59 2.480 -62.05 § Q214B

63 2.95 1.35 AS 1141.6.1

64 2.96 2.70 AS 1141.6.1

67 2.98 5.40 § AS 1141.6

68A 2.94 0.00 AS 1141.6.1

68B 2.96 2.70 AS 1141.6.1

69 3.02 10.79 § 1141.6

Apparent Particle Density (nearest 0.01 t/m 3)


z-score Method

71A 2.95 1.35 AS 1141.6.1

71B 2.94 0.00 AS 1141.6.1

74 2.94 0.00 Q214B

75 2.95 1.35 AS 1141.6.1

76 2.94 0.00 AS 1141.6.1

77 2.99 6.74 § SRPS EN

1097-6:2007 A1:2003

No. of

Results 37

Median 2.940

Normalised IQR

0.007

Robust CV 0.3%

Uncertainty of median

0.002

Minimum 2.48

Maximum 3.02

Range 0.54

Notes: A “§” indicates an outlier i.e. |z-score| ≥ 3.0.

A2

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


z-score Method

3 2.90 -0.86 AS 1141.6.1

6 2.91 0.00 AS 1141.6.1

7 2.91 0.00 AS 1141.6.1

13 2.92 0.86 AS 1141.6.1

15 2.90 -0.86 AS 1141.6.1

17 2.91 0.00 Q214B

18 2.91 0.00 AS 1141.6.1

19 2.91 0.00 Q214B

25 2.92 0.86 AS 1141.6.1

27 # na Q109B

28 2.92 0.86 AS 1141.6.1

30 2.93 1.72 AS 1141.6.1

34 2.91 0.00 AS 1141.6.1

35 2.91 0.00 AS 1141.6.1

44 2.92 0.86 AS 1141.6.1

45 2.85 -5.15 § AS 1141.6.1

46A 2.91 0.00 AS 1141.6.1

46B 2.91 0.00 AS 1141.6.1

48 2.93 1.72 AS 1141.6.1

49 2.91 0.00 AS 1141.6.1

50A 2.919 0.77 Q214B

50B 2.914 0.34 Q214B

52 2.95 3.44 § AS 1141.6.1

55 2.85 -5.15 § ASTM C127-12

59 2.462 -38.49 § Q214B

63 2.92 0.86 AS 1141.6.1

64 2.93 1.72 AS 1141.6.1

67 2.95 3.44 § AS 1141.6

68A 2.92 0.86 AS 1141.6.1

68B 2.93 1.72 AS 1141.6.1

69 2.99 6.87 § 1141.6

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


z-score Method

71A 2.91 0.00 AS 1141.6.1

71B 2.91 0.00 AS 1141.6.1

74 2.91 0.00 Q214B

75 2.92 0.86 AS 1141.6.1

76 2.90 -0.86 AS 1141.6.1

77 2.96 4.30 § SRPS EN

1097-6:2007 A1:2003

No. of

Results 36

Median 2.910

Normalised IQR

0.012

Robust CV 0.4%


0.002

Minimum 2.46

Maximum 2.99

Range 0.53

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

A3

A4


(nearest 0.01 t/m 3) Laboratory

Code Result Robust z-score Method

3 2.92 -0.15 AS 1141.6.1

6 2.92 -0.15 AS 1141.6.1

7 2.92 -0.15 AS 1141.6.1

13 2.93 0.83 AS 1141.6.1

15 2.91 -1.12 AS 1141.6.1

17 2.92 -0.15 Q214B

18 2.92 -0.15 AS 1141.6.1

19 2.92 -0.15 Q214B

25 2.92 -0.15 AS 1141.6.1

27 # # Q109B

28 2.93 0.83 AS 1141.6.1

30 2.94 1.81 AS 1141.6.1

34 2.92 -0.15 AS 1141.6.1

35 2.93 0.83 AS 1141.6.1

44 2.93 0.83 AS 1141.6.1

45 2.88 -4.06 § AS 1141.6.1

46A 2.92 -0.15 AS 1141.6.1

46B 2.92 -0.15 AS 1141.6.1

48 2.94 1.81 AS 1141.6.1

49 2.92 -0.15 AS 1141.6.1

50A 2.927 0.54 Q214B

50B 2.923 0.15 Q214B

52 2.96 3.77 § AS 1141.6.1

55 2.88 -4.06 § ASTM C127-12

59 2.469 -44.25 § Q214B

63 2.93 0.83 AS 1141.6.1

64 2.94 1.81 AS 1141.6.1

67 2.96 3.77 § AS 1141.6

68A 2.93 0.83 AS 1141.6.1

68B 2.94 1.81 AS 1141.6.1

69 3.00 7.68 § 1141.6


(nearest 0.01 t/m 3)


z-score Method

71A 2.93 0.83 AS 1141.6.1

71B 2.92 -0.15 AS 1141.6.1

74 2.92 -0.15 Q214B

75 2.93 0.83 AS 1141.6.1

76 2.91 -1.12 AS 1141.6.1

77 2.97 4.74 § SRPS EN

1097-6:2007 A1:2003

No. of

Results 36

Median 2.922

Normalised IQR 0.010

Robust CV 0.4% Uncertainty of median 0.002

Minimum 2.47

Maximum 3.00

Range 0.53


A5

Water Absorption (nearest 0.1%)


z-score Method

3 0.5 2.70 AS 1141.6.1

6 0.4 1.35 AS 1141.6.1

7 0.4 1.35 AS 1141.6.1

13 0.4 1.35 AS 1141.6.1

15 0.4 1.35 AS 1141.6.1

17 0.4 1.35 Q214B

18 0.3 0.00 AS 1141.6.1

19 0.3 0.00 Q214B

25 0.3 0.00 AS 1141.6.1

27 # # Q109B

28 0.3 0.00 AS 1141.6.1

30 0.4 1.35 AS 1141.6.1

34 0.4 1.35 AS 1141.6.1

35 0.5 2.70 AS 1141.6.1

44 0.3 0.00 AS 1141.6.1

45 1.1 10.79 § AS 1141.6.1

46A 0.4 1.35 AS 1141.6.1

46B 0.4 1.35 AS 1141.6.1

48 0.3 0.00 AS 1141.6.1

49 0.3 0.00 AS 1141.6.1

50A 0.26 -0.54 Q214B

50B 0.3 0.00 Q214B

52 0.3 0.00 AS 1141.6.1

55 1.0 9.44 § ASTM C127-12

59 0.28 -0.27 Q214B

63 0.4 1.35 AS 1141.6.1

64 0.3 0.00 AS 1141.6.1

67 0.3 0.00 AS 1141.6

68A 0.3 0.00 AS 1141.6.1

68B 0.3 0.00 AS 1141.6.1

69 0.3 0.00 1141.6

Water Absorption (nearest 0.1%)


z-score Method

71A 0.4 1.35 AS 1141.6.1

71B 0.3 0.00 AS 1141.6.1

74 0.3 0.00 Q214B

75 0.3 0.00 AS 1141.6.1

76 0.6 4.05 § AS 1141.6.1

77 0.4 1.35 SRPS EN

1097-6:2007 A1:2003

No. of

Results 36

Median 0.30

Normalised IQR

0.07

Robust CV 24.7%


0.02

Minimum 0.3

Maximum 1.1

Range 0.8


A6

A7

Particle Size Distribution (nearest 0.1%)

Laboratory Code 26.5 mm 19.0 mm Robust

z-score 13.2 mm Robust z-score Method

2 0.0 2.5 -0.43 48.9 0.21 AS 1141.11 & 1141.12

3 0.0 3.0 0.11 51.5 0.76 AS 1141.15 & 20.3

6 # 7.8 5.29 § 47.2 -0.15 AS 1141.11.1

7 0 3.2 0.32 52.4 0.96 AS 1141.11.1

12 0.0 2.9 0.00 47.9 0.00 Q103B - 2014

13 # 2.3 -0.65 53.2 1.13 Q103B Dry sieving

15 0 4 1.19 48 0.02 AS 1141.6.1

17 # 2.0 -0.97 46.7 -0.25 Q103B

18 0.0 9.0 6.58 § 45.2 -0.57 AS 1141.11.1

19 0 2.5 -0.43 51.2 0.70 Q103B

20 100.0 3.0 0.11 24.8 -4.91 § Q.T

25 0.0 2.6 -0.32 44.7 -0.68 AS 1141.11.1

27 0 3.3 0.43 46.2 -0.36 Q103B

28 0.0 1.5 -1.51 48.4 0.11 AS 1141.11.1

29 0.0 2.0 -0.97 44.2 -0.79 1141.11.1

30 0.0 2.1 -0.86 45.5 -0.51 AS 1141.11

31 0.0 3.0 0.11 54.1 1.32 AS 1141.11

34 0 3.3 0.43 62.2 3.04 § AS 1141.11.1

35 # 1.0 -2.05 48.0 0.02 AS 1141.11

40 0.0 2.9 0.00 52.0 0.87 Q103B - 2014

44 0 3.2 0.32 46.8 -0.23 AS 1141.11.1

45 0 3.7 0.86 54.8 1.47 AS 1141.11.1

46A 0.0 0.8 -2.27 47.2 -0.15 AS 1141.11.1

46B 0.0 2.3 -0.65 51.2 0.70 AS 1141.11.1

48 0.0 1.8 -1.19 49.1 0.25 AS 1141.11.1

49 0 1.9 -1.08 44.7 -0.68 AS 1141.11.1

50A # 5.8 3.13 § 55.1 1.53 AS 1141.11

50B # 2.5 -0.43 49.1 0.25 AS 1141.11

51 0 5.1 2.37 46.4 -0.32 AS 1141.11.1

52 0.0 3.9 1.08 45.9 -0.42 AS 1141.11.1

55 0.0 3.3 0.43 46.5 -0.30 ASTM C136-06

57 0.0 0.5 -2.59 49.1 0.25 #

59 0.0 4.1 1.30 55 1.51 Q103B

63 0.0 1.9 -1.08 46.8 -0.23 AS 1141.11.1

64 0.0 2.5 -0.43 44.8 -0.66 AS 1141.11.1

65 0 1.0 -2.05 43.2 -1.00 AS 1141.11.1

67 0.0 2.3 -0.65 53.5 1.19 AS 1141.11

68A 0.0 3.2 0.32 47.3 -0.13 AS 1141.11

68B 0.0 1.1 -1.94 43.5 -0.93 AS 1141.11.1

69 0 3.5 0.65 51.4 0.74 1141.11.1

A8

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.

Particle Size Distribution (nearest 0.1%) continued

Laboratory Code 26.5 mm 19.0 mm Robust


70 0.0 1.4 -1.62 45.0 -0.62 AS 1141.11.1

71A 0 5.5 2.81 53.2 1.13 AS 1141.11.1 (washed)

71B 100 2.8 -0.11 52.4 0.96 AS 1141.11.1 (washed)

73 0.0 3.0 0.11 51.9 0.85 AS 1141.11.1

74 0.0 3.0 0.11 42.0 -1.25 Q103B

75 0.0 3.3 0.43 42.4 -1.17 AS 1141.11.1

76 100 98* na 49* na AS 1141.11

77 0.0 11.0 8.74 § 39.0 -1.89 SRPS EN 933-1:2013

No. of Results:

42 47 47

Median: 2.90 47.90 Normalised

IQR: 0.93 4.71

Robust CV: 32.0% 9.8% Uncertainty of median:

0.17 0.86

Minimum: 0.5 24.8

Maximum: 11.0 62.2

Range: 10.5 37.4

A9

A10


Laboratory Code 9.5 mm Robust


2 39.7 -0.36 6.4 0.29 AS 1141.11 & 1141.12

3 37.2 -1.05 5.1 -0.66 AS 1141.15 & 20.3

6 38.1 -0.80 5.7 -0.22 AS 1141.11.1

7 38.3 -0.74 4.8 -0.88 AS 1141.11.1

12 41.1 0.03 6.6 0.44 Q103B - 2014

13 38.3 -0.74 4.7 -0.95 Q103B Dry sieving

15 41 0.00 6 0.00 AS 1141.6.1

17 41.2 0.06 7.5 1.09 Q103B

18 38.7 -0.63 5.5 -0.36 AS 1141.11.1

19 38.4 -0.72 6.3 0.22 Q103B

20 45.0 1.10 8.3 1.68 Q.T

25 42.9 0.52 7.6 1.17 AS 1141.11.1

27 41.7 0.19 6.4 0.29 Q103B

28 41.6 0.17 5.9 -0.07 AS 1141.11.1

29 46.8 1.60 5.3 -0.51 1141.11.1

30 44.9 1.07 5.9 -0.07 AS 1141.11

31 46.9 1.62 5.1 -0.66 AS 1141.11

34 31.3 -2.67 2.1 -2.84 AS 1141.11.1

35 42.0 0.28 6.0 0.00 AS 1141.11

40 37.7 -0.91 5.5 -0.36 Q103B - 2014

44 40.2 -0.22 7.5 1.09 AS 1141.11.1

45 36.4 -1.27 4.1 -1.39 AS 1141.11.1

46A 43.0 0.55 6.2 0.15 AS 1141.11.1

46B 37.5 -0.96 7.1 0.80 AS 1141.11.1

48 43.1 0.58 4.9 -0.80 AS 1141.11.1

49 44.3 0.91 6.9 0.66 AS 1141.11.1

50A 34.2 -1.87 4.0 -1.46 AS 1141.11

50B 38.2 -0.77 7.1 0.80 AS 1141.11

51 39.6 -0.39 5.9 -0.07 AS 1141.11.1

52 41.6 0.17 6.6 0.44 AS 1141.11.1

55 42.0 0.28 5.5 -0.36 ASTM C136-06

57 44.7 1.02 5.1 -0.66 #

59 37 -1.10 3.3 -1.97 Q103B

63 41.2 0.06 6.9 0.66 AS 1141.11.1

64 43.2 0.61 7.3 0.95 AS 1141.11.1

65 46.2 1.43 6.3 0.22 AS 1141.11.1

67 37.1 -1.07 5.3 -0.51 AS 1141.11

68A 40.5 -0.14 7.1 0.80 AS 1141.11

68B 45.6 1.27 7.6 1.17 AS 1141.11.1

69 38.7 -0.63 4.6 -1.02 1141.11.1

A11





70 45.3 1.18 6.2 0.15 AS 1141.11.1

71A 35.2 -1.60 4.2 -1.31 AS 1141.11.1 (washed)

71B 39.1 -0.52 3.9 -1.53 AS 1141.11.1 (washed)

73 38.5 -0.69 5.2 -0.58 AS 1141.11.1

74 45.7 1.29 7.0 0.73 Q103B

75 43.5 0.69 7.7 1.24 AS 1141.11.1

76 6* na 1* na AS 1141.11

77 35.0 -1.65 13.3 5.32 § SRPS EN 933-1:2013

No. of Results:

47 47


IQR: 3.63 1.37


0.66 0.25

Minimum: 31.3 2.1 Maximum: 46.9 13.3

Range: 15.6 11.2

A12

A13




2 1.0 0.81 3.3 13.94 § AS 1141.11 & 1141.12

3 0.9 0.54 0.3 0.45 AS 1141.15 & 20.3

6 0.7 0.00 0.1 -0.45 AS 1141.11.1

7 0.4 -0.81 0.2 0.00 AS 1141.11.1

12 0.5 -0.54 0.2 0.00 Q103B - 2014

13 0.5 -0.54 0.2 0.00 Q103B Dry sieving

15 0 -1.89 0 -0.90 AS 1141.6.1

17 1.1 1.08 0.4 0.90 Q103B

18 0.3 -1.08 0.1 -0.45 AS 1141.11.1

19 0.6 -0.27 0.1 -0.45 Q103B

20 1.0 0.81 0.4 0.90 Q.T

25 1.0 0.81 0.4 0.90 AS 1141.11.1

27 1.1 1.08 0.4 0.90 Q103B

28 0.9 0.54 0.3 0.45 AS 1141.11.1

29 0.7 0.00 0.2 0.00 1141.11.1

30 0.5 -0.54 0.3 0.45 AS 1141.11

31 0.8 0.27 0.6 1.80 AS 1141.11

34 0.1 -1.62 0 -0.90 AS 1141.11.1

35 1.0 0.81 0.0 -0.90 AS 1141.11

40 0.8 0.27 0.3 0.45 Q103B - 2014

44 0.7 0.00 0.3 0.45 AS 1141.11.1

45 0.4 -0.81 0.2 0.00 AS 1141.11.1

46A 1.3 1.62 0.2 0.00 AS 1141.11.1

46B 1.0 0.81 0.3 0.45 AS 1141.11.1

48 0.5 -0.54 0.2 0.00 AS 1141.11.1

49 1.0 0.81 0.4 0.90 AS 1141.11.1

50A 0.3 -1.08 0.0 -0.90 AS 1141.11

50B 1.4 1.89 0.4 0.90 AS 1141.11

51 0.9 0.54 0.4 0.90 AS 1141.11.1

52 0.5 -0.54 0.2 0.00 AS 1141.11.1

55 0.8 0.27 0.4 0.90 ASTM C136-06

57 0.4 -0.81 0.1 -0.45 #

59 0.3 -1.08 0.1 -0.45 Q103B

63 1.3 1.62 0.4 0.90 AS 1141.11.1

64 0.8 0.27 0.2 0.00 AS 1141.11.1

65 1.4 1.89 0.4 0.90 AS 1141.11.1

67 0.5 -0.54 0.1 -0.45 AS 1141.11

68A 0.8 0.27 0.2 0.00 AS 1141.11

68B 1.1 1.08 0.2 0.00 AS 1141.11.1

69 0.5 -0.54 0.1 -0.45 1141.11.1

A14





70 0.7 0.00 0.2 0.00 AS 1141.11.1

71A 0.6 -0.27 0.1 -0.45 AS 1141.11.1 (washed)

71B 0.7 0.00 0.1 -0.45 AS 1141.11.1 (washed)

73 0.6 -0.27 0.2 0.00 AS 1141.11.1

74 0.9 0.54 0.4 0.90 Q103B

75 1.7 2.70 0.4 0.90 AS 1141.11.1

76 1* na 0* na AS 1141.11

77 0.2 -1.35 0.2 0.00 SRPS EN 933-1:2013

No. of Results:

47 47


IQR: 0.37 0.22


0.07 0.04

Minimum: 0.0 0.0 Maximum: 1.7 3.3

Range: 1.7 3.3

A15

Particle Size Distribution 0.075 mm (nearest 0.1%)


z-score Method

2 0.1 -0.67 AS 1141.11 & 1141.12

3 0.2 0.00 AS 1141.15 & 20.3

6 0.2 0.00 AS 1141.11.1

7 0.2 0.00 AS 1141.11.1

12 0.3 0.67 Q103B - 2014

13 0.2 0.00 Q103B Dry sieving

15 0 -1.35 AS 1141.6.1

17 0.3 0.67 Q103B

18 0.2 0.00 AS 1141.11.1

19 0.1 -0.67 Q103B

20 Q.T

25 0.4 1.35 AS 1141.11.1

27 Q103B

28 0.2 0.00 AS 1141.11.1

29 0.0 -1.35 1141.11.1

30 0.3 0.67 AS 1141.11

31 0.1 -0.67 AS 1141.11

34 0.2 0.00 AS 1141.11.1

35 0.0 -1.35 AS 1141.11

40 0.3 0.67 Q103B - 2014

44 1.0 5.40 § AS 1141.11.1

45 0.1 -0.67 AS 1141.11.1

46A 0.2 0.00 AS 1141.11.1

46B 0.0 -1.35 AS 1141.11.1

48 0.1 -0.67 AS 1141.11.1

49 0.3 0.67 AS 1141.11.1

50A 0.2 0.00 AS 1141.11

50B 0.1 -0.67 AS 1141.11

51 0.3 0.67 AS 1141.11.1

52 0.2 0.00 AS 1141.11.1

55 0.3 0.67 ASTM C136-06

57 0.0 -1.35 #

59 0.1 -0.67 Q103B

Particle Size Distribution 0.075 mm (nearest 0.1%)


z-score Method

63 0.1 -0.67 AS 1141.11.1

64 0.3 0.67 AS 1141.11.1

65 0.2 0.00 AS 1141.11.1

67 0.1 -0.67 AS 1141.11

68A 0.2 0.00 AS 1141.11

68B 0.2 0.00 AS 1141.11.1

69 0.0 -1.35 1141.11.1

70 0.1 -0.67 AS 1141.11.1

71A 0.2 0.00 AS 1141.11.1 (washed)

71B 0.1 -0.67 AS 1141.11.1 (washed)

73 0.0 -1.35 AS 1141.11.1

74 0.3 0.67 Q103B

75 # na AS 1141.11.1

76 0* na AS 1141.11

77 0.4 1.35 SRPS EN 933-1:2013

No. of

Results 44

Median 0.20

Normalised IQR

0.15

Robust CV 74.1%


0.03

Minimum 0.0

Maximum 1.0

Range 1.0


A16

A17



z-score Method

3 13 0.45 AS 1141.15 & 20.3

6 13 0.45 #

7 5 -3.15 § AS 1141.15

12 11 -0.45 Q201 - 2010

13 9 -1.35 Q201

15 12 0.00 AS 1141.6.1

17 10 -0.90 Q201

18 14 0.90 AS 1141.15

19 12 0.00 Q201

20 10 -0.90 Q.T

25 14 0.90 AS 1141.15

27 10 -0.90 Q201

28 13 0.45 AS 1141.15

30 12 0.00 AS 1141.15

31 12.9 0.40 AS 1141.15

34 10 -0.90 AS 1141.15

35 10 -0.90 AS 1141.15

40 15 1.35 Q201 - 2010

44 11 -0.45 AS 1141.15

46A 15 1.35 AS 1141.15

46B 14 0.90 AS 1141.15

48 13 0.45 AS 1141.15

49 8 -1.80 AS 1141.5

50A 7 -2.25 Q201

50B 6 -2.70 Q201

52 12 0.00 AS 1141.15

55 13 0.45 BS 812 Part 105.1: 1989

57 13.0 0.45 #

59 12 0.00 Q201

63 14 0.90 AS 1141.15

64 10 -0.90 AS 1141.15

65 17 2.25 AS 1141.15

67 11 -0.45 AS 1141.15



z-score Method

68A 14 0.90 AS 1141.15

68B 12 0.00 AS 1141.15

69 14.0 0.90 1141.15

71A 13 0.45 AS 1141.15

71B 13.0 0.45 AS 1141.15

74 12 0.00 Q201

75 15 1.35 AS 1141.15

76 11 -0.45 AS 1141.15

77 9 -1.35 SRPS EN 933-3:2013

No. of

Results 42

Median 12.0

Normalised IQR

2.2

Robust CV 18.5%


0.4

Minimum 5

Maximum 17

Range 12


A18

Average Least Dimension (ALD) 10 mm and greater (nearest 0.1 mm)


z-score Method

2 10.5 0.18 AS 1141.20.1

3 11 0.76 AS 1141.15 & 20.3

6 9.9 -0.53 AS 1141.20.1

7 10.2 -0.18 AS 1141.20.1

12 10.9 0.65 Q202 - 2010

13 11.2 1.00 Q202

15 9.9 -0.53 AS 1141.20.1

17 13.2 3.34 § Q202

18 10.1 -0.29 AS 1141.20.1

19 10.6 0.29 Q202

20 10.4 0.06 AS 1141.20.3

25 9.1 -1.47 AS 1141.20.1

27 10.5 0.18 Q202

28 9.5 -1.00 AS 1141.20.1

30 9.6 -0.88 AS 1141.20.1

31 11.1 0.88 AS 1141.20.3

34 10.4 0.06 AS 1141.20.1

35 10.5 0.18 AS 1141.20.1

40 10.6 0.29 Q202 - 2010

44 9.3 -1.23 AS 1141.20.1

46A 9.8 -0.65 AS 1141.20.1

46B 9.9 -0.53 AS 1141.20.1

48 14.1 4.40 § AS 1141.20.1

49 10.0 -0.41 Q202

50A 11.5 1.35 Q202

50B 11.4 1.23 Q202

52 10.1 -0.29 AS 1141.20.1

57 10.6 0.29 #

59 11.4 1.23 Q202

63 9.6 -0.88 AS 1141.20.1

65 9.7 -0.76 AS 1141.20.1

67 7.8 -2.99 AS 1141.20.1

Average Least Dimension (ALD) 10 mm and greater (nearest 0.1 mm)


z-score Method

68A 10.1 -0.29 AS 1141.20.1

68B 9.8 -0.65 AS 1141.20.1

69 11.2 1.00 1141.20.3

70 9.5 -1.00 AS 1141.20.1

71A 9.0 -1.58 AS 1141.20

71B 11.2 1.00 #

73 10.4 0.06 1141.20.1

74 10.3 -0.06 Q202

75 10.0 -0.41 AS 1141.20.1

76 11.4 1.23 AS 1141.20.1

No. of

Results 42

Median 10.35

Normalised IQR

0.85

Robust CV 8.2%


0.2

Minimum 7.8

Maximum 14

Range 6.3


A19

Particle Shape by Proportional Caliper (nearest 1%)


z-score Method

2 7.0 -1.35 AS 1141.14

3 8.0 -1.08 1141.14

6 15 0.81 AS 1141.14

7 10 -0.54 AS 1141.14

13 17 1.35 AS 1141.14

15 10 -0.54 AS 1141.14

17 9 -0.81 AS 1141.14

18 12 0.00 AS 1141.14

25 11 -0.27 AS 1141.14

28 18 1.62 AS 1141.14

30 15 0.81 AS 1141.14

31 12.6 0.16 AS 1141.14

34 8 -1.08 AS 1141.14

35 10 -0.54 AS 1141.14

44 12 0.00 AS 1141.14 (2:1)only

46A 14 0.54 AS 1141.14

46B 15 0.81 AS 1141.14

48 14 0.54 AS 1141.14

49 9 -0.81 AS 1141.14

52 12 0.00 AS 1141.14

55 55 11.60 § ASTM D4791-10 (Method B)

63 19 1.89 AS 1141.14

64 12.6 0.16 AS 1141.14

65 12 0.00 AS 1141.14

67 15 0.81 AS 1141.14

68A 13 0.27 AS 1141.14

68B 11 -0.27 AS 1141.14

69 16 1.08 1141.14

Particle Shape by Proportional Caliper (nearest 1%)


z-score Method

70 16 1.08 AS 1141.14

71A 11 -0.27 AS 1141.14

71B 6 -1.62 AS 1141.14

73 18 1.62 AS 1141.14

74 13 0.27 AS 1141.14

75 7 -1.35 AS 1141.14

76 12 0.00 AS 1141.14

77 9 -0.81 SRPS EN 933-4:2010

No. of

Results 36

Median 12.0

Normalised IQR

3.7

Robust CV 30.9%


0.8

Minimum 6.0

Maximum 55

Range 49.0

Notes: A “§” indicates an outlier i.e. |z-score| ≥ 3.0.

A20

APPENDIX B

Homogeneity Testing

B1

Homogeneity Testing

Aggregate Round 13 - Proficiency Testing Homogenei ty Results

Sample no. Individual Percent Retained

(AS Sieve Size in mm) - AS 1141.11

Particle Shape by

Proportional Caliper %

Flakiness Index (%)

ALD (mm)

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

65 2.8 48.6 40.9 5.5 0.8 12 12 10.1 2.95 2.91 2.92

47 2.6 47.2 40.9 5.7 0.7 14 12 9.6 2.94 2.91 2.92

64 2.8 48.1 41.1 5.4 0.8 13 13 10.3 2.95 2.90 2.92

22 2.8 48.3 41.1 5.9 0.7 12 13 9.4 2.95 2.92 2.93

15 2.8 47.8 39.5 6.4 0.8 12 13 10.2 2.95 2.92 2.93

33 3.0 48.0 41.7 5.4 0.6 12 13 9.9 2.94 2.91 2.92

56 2.5 48.9 40.1 5.8 0.8 12 14 10.1 2.94 2.92 2.91

6 2.8 47.9 40.5 6.1 0.6 12 14 10.3 2.94 2.91 2.90

Mean 2.8 48.1 40.7 5.8 0.7 12.4 13.0 10.0 2.945 2.911 2.919 Standard Deviation 0.15 0.52 0.68 0.36 0.09 0.74 0.76 0.33 0.005 0.005 0.010

Coefficient of

Variation 0.055 0.011 0.017 0.062 0.122 0.060 0.058 0.033 0.002 0.002 0.003

Lowest Value 2.5 47.2 39.5 5.4 0.6 12 12 9.4 2.937 2.904 2.9

Highest Value 3 48.9 41.7 6.4 0.8 14 14 10.3 2.953 2.92 2.93

APPENDIX C

Documentation

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

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

C1

PROFICIENCY TESTING AUSTRALIA AGGREGATES (ROUND 13) 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 12-15 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 –AS 1141.6.1 • Particle Size Distribution – AS 1141.11 • Flakiness Index – AS 1141.15 • ALD Direct measurement 10mm and greater – AS 1141.20.1 • Particle Shape by Proportional Caliper – AS 1141.14 (2:1 ratio 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. Participants are to treat the proficiency testing samples as they would a routine

sample tested in the laboratory. 7. Testing may commence as soon as the sample is received. All laboratories

must return the results sheet no later than 7 November 2014 to: Laura Galbraith Proficiency Testing Australia Fax: 02 9743 6664 Email: [email protected]

C2

PROFICIENCY TESTING AUSTRALIA AGGREGATES (ROUND 13) 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%)

26.5 mm

19.0 mm

13.2 mm

9.5 mm

6.7 mm

4.75 mm

2.36 mm

0.075 mm


Average Least Dimension (ALD) 10mm and greater

(nearest 0.1mm)

Particle Shape by Proportional Caliper

(nearest 1%)

2:1 Ratio only

Date of tests: Signature: Please return by 7 November 2014 to: Laura Galbraith Proficiency Testing Australia Fax: 02 9743 6664 Email: [email protected]

- End of Report -

Documents

Report No. 894 Aggregates Proficiency Testing Round 13 ...capeyork.myownserver.net/~ptaasnau/documents/894.pdf · Flakiness Index (nearest 1%) ... - the robust coefficient of variation,