Report No. 856 Aggregates Proficiency Testing Round 12 …capeyork.myownserver.net/~ptaasnau/documents/856.pdf · - the robust coefficient of variation, expressed as a percentage

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Report No. 856

Aggregates Proficiency Testing

Round 12

May 2014

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, 2014

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

5. PTA AND TECHNICAL ADVISOR’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 ..................................................................................................... 9

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%).................................................................................. …A13

Dry Strength Loss at Nominated Load (nearest 0.1%)………………....................... …A14 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 twelfth round of an ongoing series of programs. The program was conducted in March 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 Advisor was Mr G Hooper, Golder Associates Pty Ltd. This report was authorised by Mrs F Watton, Quality - Business Development Manager.

2. FEATURES OF THE PROGRAM (a) Participants were provided with one 13 Kg sample of aggregate. (b) A total of 66 laboratories received samples, comprising:

- 60 Australian participants; and

- 6 overseas participants, including:

- Malaysia; - Serbia; - Republic of Korea; and - Papua New Guinea.

Of these 66 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.

(f) Results (as reported by participants) with corresponding summary statistics

(i.e. number of results, median, uncertainty of the median, normalised

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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 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, 2012 (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 “§”.

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The table on page 9 summarises the outlier results detected. (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 significant figures) 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;

- 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.

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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) 45 2.640 0.007

Particle Density on a Dry Basis (nearest 0.01 t/m3) 45 2.580 0.009

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

45 2.600 0.010

Water Absorption (nearest 0.1%) 45 0.90 0.07

Particle Size Distribution (individual percent retained to

nearest 0.1%)

26.5 mm 60 Not calculated

19.0 mm 60 5.85 1.30

13.2 mm 60 50.15 2.87

9.5 mm 60 37.40 3.02

4.75 mm 60 5.00 1.35

Flakiness Index (nearest 1%)

43 13.0 2.2

Dry Strength Loss at Nominated Load (nearest 0.1%) 33 8.60 0.89

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5. PTA AND TECHNICAL ADVISOR’S COMMENTS General Comments For this round, of the 66 participating laboratories, 2 laboratories could not submit results in time for inclusion into the final report. Another 2 laboratories results were omitted from the consensus due to reporting errors in Particle Size Distribution. Thus the participating 62 laboratories returned a total of 496 results for z-score analysis. Of these, 27 results were outliers, thus making up 5.4% 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 43, which returned an outlier for all Particle Density and Water Absorption 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 Queensland Department of Main Roads Method Q214B reproducibility guidelines. Please note summary sheets have been reissued to reflect changes made by the reproducibility guidelines. All laboratories reporting outlier results are encouraged to check their procedures and calibration of equipment. Particle Size Distribution For Particle Size Distribution (PSD) at 26.5mm, 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. There was a high occurrence of outliers in the 4.75 mm sieve analysis. Laboratories receiving an outlier may need to check if they used only the sieves from which results were requested. If laboratories used other sieves, for example a 6.7 mm sieve, then material retained on this sieve must be included in the amount retained on the 4.75 mm sieve. Results submitted by laboratories 25 and 79 were omitted from the consensus as results were not reported to the correct units.

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Flakiness Index and Dry Strength at Nominated Load No outliers were reported for Flakiness Index. Results reported for Dry Strength at Nominated Load were satisfactory. 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 20mm sized aggregate supplied from a quarry was used for the Aggregates Round 12 program. This sample was prepared according to standard AS1141.3.1, 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 12 0.3% 4.4 0.4% 2.2 0.4% 2.2 8.2% 4.4 17.1% -- 10.3% 3.0

Aggregates 11 0.3% 8.8 0.4% 8.8 0.4% 5.9 18.5% 5.9 15.9% -- na na

Aggregates 10 0.3% 6.9 0.3% -- 0.6% 3.6 24.7% 3.3 8.7% 14.3 11.4% --

Particle Size

Distribution (individual percent retained to

nearest 0.1%)

19.0mm 13.2mm 9.5mm 4.75mm

Round Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

Robust CV

% outliers

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

Aggregates 11 56.7% 4.5 8.5% -- 7.7% 2.3 21.2% 4.4

Aggregates 10 na na 19.1% -- 4.8% 6.4 22.6% --

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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) AS1141.6.1 37 2.640 0.002

Particle Density on a Dry Basis (nearest 0.01 t/m3) AS1141.6.1 37 2.580 0.002

Particle Density on a Saturated-Surface-Dry Basis

(nearest 0.01 t/m3) AS1141.6.1 37 2.640 0.002

Water Absorption (nearest 0.1%) AS1141.6.1 37 0.90 0.02

Particle Size Distribution (individual percent retained

to nearest 0.1%)

19.0 mm AS1141.11 & AS1141.11.1 44 6.00 0.25

13.2 mm AS1141.11 & AS1141.11.1 44 50.15 0.55

9.5 mm AS1141.11 & AS1141.11.1 44 37.30 0.53

4.75 mm AS1141.11 & AS1141.11.1 44 5.10 0.26


AS1141.15 33 13.0 0.5

Dry Strength Loss at Nominated Load (nearest 0.1%)

AS1141.22 27 8.60 0.19

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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) 43, 64

Particle Density on a Dry Basis (nearest 0.01 t/m3) 43


(nearest 0.01 t/m3) 43

Water Absorption (nearest 0.1%) 43, 69

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

19.0 mm 10, 33, 57, 71

13.2 mm 23, 57, 71

9.5 mm 2, 57, 71

4.75 mm 9, 37, 40, 44, 51A,

51B, 51C, 61, 64, 71 Flakiness Index

(nearest 1%) --

Dry Strength Loss at Nominated Load (nearest 0.1%) 4

7. REFERENCES

[1] Guide to Proficiency Testing Australia, 2012 (This document can be found on the PTA website, www.pta.asn.au).

[2] AS1141.3.1 - 2012 Methods for sampling and testing aggregates Method 3.1 Sampling - Aggregates.

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

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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%).................................................................................. …A13

Dry Strength Loss at Nominated Load (nearest 0.1%)………………....................... …A14

A1

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Apparent Particle Density (nearest 0.01 t/m 3)

Laboratory Code Result Robust

z-score Method

1 2.62 -2.70 1141.6.1

2 2.64 0.00 AS1141.6.1

4 2.64 0.00 AS1141.6.1

5 2.63 -1.35 AS1141.6.1

9 2.63 -1.35 AS1141.6.1

10 2.64 0.00 ISO 6783

12 2.63 -1.35 Q214B

16 2.64 0.00 AS1141.6.1

18 2.64 0.00 MS EN 1097 Part 6

19 2.64 0.00 AS1141.6.1

20 2.64 0.00 AS1141.6.1

22 2.64 0.00 AS1141.6.1-2000

23 2.63 -1.35 AS1141.6.1

26 2.64 0.00 1141.6.1

27 2.63 -1.35 AS1141.6.1

28 2.64 0.00 AS1141.6.1

29 2.64 0.00 AS1141.6.1

30 2.65 1.35 AS1141.6.1

31 2.64 0.00 ASTM C 127

33 2.65 1.35 AS1141.6.1

36 2.64 0.00 AS1141.6.1

37 2.64 0.00 AS1141.6.1

39 2.63 -1.35 AS1141.6.1

40 2.65 1.35 AS1141.6.1

41 2.63 -1.35 AS1141.6.1

43 2.59 -6.74 § AS1141.6.1

44 2.64 0.00 AS1141.6.1

45 2.65 1.35 1141.6.1

47 2.64 0.00 AS1141.6.1

51A 2.64 0.00 #

51B 2.64 0.00 #

51C 2.64 0.00 #

53 2.63 -1.35 AS1141.6.1

Apparent Particle Density



z-score Method

56 2.64 0.00 AS1141.6.1

58 2.64 0.00 AS1141.6.2

60 2.63 -1.35 AS1141.6.1

61 2.63 -1.35 AS1141.6.1

64 2.67 4.05 § AS1141.6.1

68 2.64 0.00 AS1141.6.1

69 2.64 0.00 AS1141.6.1

76 2.63 -1.35 AS1141.6.1 - 2000

77 2.64 0.00 AS1141.6.1

78A 2.64 0.00 AS1141.6.1

78B 2.64 0.00 AS1141.6.1

78C 2.65 1.35 AS1141.6.1

No. of

Results 45

Median 2.640 Normalised

IQR 0.007

Robust CV 0.3% Uncertainty of median

0.001

Minimum 2.59

Maximum 2.67

Range 0.08

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

A2

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


z-score Method

1 2.58 0.00 1141.6.1

2 2.57 -1.11 AS1141.6.1

4 2.58 0.00 AS1141.6.1

5 2.57 -1.11 AS1141.6.1

9 2.57 -1.11 AS1141.6.1

10 2.58 0.00 ISO 6783

12 2.56 -2.21 Q214B

16 2.58 0.00 AS1141.6.1

18 2.59 1.11 MS EN 1097 Part 6

19 2.58 0.00 AS1141.6.1

20 2.58 0.00 AS1141.6.1

22 2.58 0.00 AS1141.6.1-2000

23 2.58 0.00 AS1141.6.1

26 2.57 -1.11 1141.6.1

27 2.57 -1.11 AS1141.6.1

28 2.58 0.00 AS1141.6.1

29 2.57 -1.11 AS1141.6.1

30 2.58 0.00 AS1141.6.1

31 2.57 -1.11 ASTM C 127

33 2.58 0.00 AS1141.6.1

36 2.59 1.11 AS1141.6.1

37 2.58 0.00 AS1141.6.1

39 2.58 0.00 AS1141.6.1

40 2.59 1.11 AS1141.6.1

41 2.57 -1.11 AS1141.6.1

43 2.47 -12.18 § AS1141.6.1

44 2.57 -1.11 AS1141.6.1

45 2.58 0.00 1141.6.1

47 2.58 0.00 AS1141.6.1

51A 2.58 0.00 #

51B 2.58 0.00 #

51C 2.59 1.11 #

53 2.58 0.00 AS1141.6.1

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


z-score Method

56 2.57 -1.11 AS1141.6.1

58 2.59 1.11 AS1141.6.2

60 2.57 -1.11 AS1141.6.1

61 2.56 -2.21 AS1141.6.1

64 2.60 2.21 AS1141.6.1

68 2.58 0.00 AS1141.6.1

69 2.56 -2.21 AS1141.6.1

76 2.56 -2.21 AS1141.6.1 - 2000

77 2.58 0.00 AS1141.6.1

78A 2.57 -1.11 AS1141.6.1

78B 2.58 0.00 AS1141.6.1

78C 2.57 -1.11 AS1141.6.1

No. of

Results 45


IQR 0.009


0.002

Minimum 2.47

Maximum 2.60

Range 0.13


A3

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A4

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(nearest 0.01 t/m 3) Laboratory

Code Result Robust z-score Method

1 2.60 0.00 1141.6.1

2 2.60 0.00 AS1141.6.1

4 2.60 0.00 AS1141.6.1

5 2.59 -0.96 AS1141.6.1

9 2.59 -0.96 AS1141.6.1

10 2.60 0.00 ISO 6783

12 2.59 -0.96 Q214B

16 2.60 0.00 AS1141.6.1

18 2.61 0.96 MS EN 1097 Part 6

19 2.60 0.00 AS1141.6.1

20 2.61 0.96 AS1141.6.1

22 2.60 0.00 AS1141.6.1-2000

23 2.60 0.00 AS1141.6.1

26 2.60 0.00 1141.6.1

27 2.59 -0.96 AS1141.6.1

28 2.61 0.96 AS1141.6.1

29 2.60 0.00 AS1141.6.1

30 2.60 0.00 AS1141.6.1

31 2.60 0.00 ASTM C 127

33 2.61 0.96 AS1141.6.1

36 2.61 0.96 AS1141.6.1

37 2.60 0.00 AS1141.6.1

39 2.60 0.00 AS1141.6.1

40 2.61 0.96 AS1141.6.1

41 2.60 0.00 AS1141.6.1

43 2.52 -7.69 § AS1141.6.1

44 2.60 0.00 AS1141.6.1

45 2.61 0.96 1141.6.1

47 2.60 0.00 AS1141.6.1

51A 2.60 0.00 #

51B 2.60 0.00 #

51C 2.61 0.96 #

53 2.59 -0.96 AS1141.6.1




z-score Method

56 2.60 0.00 AS1141.6.1

58 2.60 0.00 AS1141.6.2

60 2.59 -0.96 AS1141.6.1

61 2.59 -0.96 AS1141.6.1

64 2.63 2.88 AS1141.6.1

68 2.60 0.00 AS1141.6.1

69 2.59 -0.96 AS1141.6.1

76 2.59 -0.96 AS1141.6.1 - 2000

77 2.60 0.00 AS1141.6.1

78A 2.60 0.00 AS1141.6.1

78B 2.60 0.00 AS1141.6.1

78C 2.60 0.00 AS1141.6.1

No. of

Results 45


IQR 0.010


0.002

Minimum 2.52

Maximum 2.63

Range 0.11


A5

SD 2.12.05



z-score Method

1 0.7 -2.70 1141.6.1

2 1.0 1.35 AS1141.6.1

4 0.9 0.00 AS1141.6.1

5 0.9 0.00 AS1141.6.1

9 1.0 1.35 AS1141.6.1

10 1.0 1.35 ISO 6783

12 0.9 0.00 Q214B

16 0.9 0.00 AS1141.6.1

18 0.9 0.00 MS EN 1097 Part 6

19 0.8 -1.35 AS1141.6.1

20 0.8 -1.35 AS1141.6.1

22 0.9 0.00 AS1141.6.1-2000

23 0.8 -1.35 AS1141.6.1

26 1.0 1.35 1141.6.1

27 1.0 1.35 AS1141.6.1

28 0.84 -0.81 AS1141.6.1

29 0.9 0.00 AS1141.6.1

30 1.0 1.35 AS1141.6.1

31 1.0 1.35 ASTM C 127

33 1.0 1.35 AS1141.6.1

36 0.8 -1.35 AS1141.6.1

37 0.9 0.00 AS1141.6.1

39 0.8 -1.35 AS1141.6.1

40 0.9 0.00 AS1141.6.1

41 0.9 0.00 AS1141.6.1

43 1.9 13.49 § AS1141.6.1

44 1.0 1.35 AS1141.6.1

45 1.0 1.35 1141.6.1

47 0.9 0.00 AS1141.6.1

51A 0.9 0.00 #

51B 1.0 1.35 #

51C 0.9 0.00 #

53 0.8 -1.35 AS1141.6.1



z-score Method

56 0.9 0.00 AS1141.6.1

58 0.9 0.00 AS1141.6.2

60 0.8 -1.35 AS1141.6.1

61 1.1 2.70 AS1141.6.1

64 0.9 0.00 AS1141.6.1

68 0.9 0.00 AS1141.6.1

69 1.2 4.05 § AS1141.6.1

76 1.0 1.35 AS1141.6.1 - 2000

77 0.9 0.00 AS1141.6.1

78A 1.1 2.70 AS1141.6.1

78B 0.9 0.00 AS1141.6.1

78C 1.0 1.35 AS1141.6.1

No. of

Results 45


IQR 0.07

Robust CV 8.2%

Uncertainty of median

0.01

Minimum 0.7

Maximum 1.9

Range 1.2


A6

SD 2.12.05

A7

SD 2.12.05

Particle Size Distribution (nearest 0.1%)

Laboratory Code 26.5 mm 19.0 mm Robust

z-score 13.2 mm Robust z-score Method

1 0 7.2 1.04 56.2 2.11 1141.11

2 0 4.7 -0.89 52.2 0.71 Q103B (AS1141.11)

4 0 8.6 2.12 49.9 -0.09 AS1141.11.1

5 0 5.8 -0.04 48.9 -0.44 AS1141.11

9 0.0 8.2 1.81 45.9 -1.48 AS1141.11.1

10 0 13.5 5.90 § 44.3 -2.04 EN 933-1

11 0 5.7 -0.12 50.3 0.05 AS1141.11

12 0 5.9 0.04 49.7 -0.16 Q103B

16 0 4.6 -0.96 54.5 1.51 AS1141.11.1

17 0.0 8.1 1.73 47.4 -0.96 AS1141.11

18 0 6.4 0.42 49.0 -0.40 MS30:Part 4

19 0 6.5 0.50 46 -1.44 AS1141.11.1

20 0 9.6 2.89 51.7 0.54 AS1141.11.1

23 0 5 -0.66 41 -3.19 § AS1141.11.1

24 0.0 5.0 -0.66 47.0 -1.10 Q103B-1996

25 0.0 7.6* na 60.5* na 1141.11.1

26 0.0 5.7 -0.12 52.9 0.96 1141.11.1

27 0.0 9.0 2.43 50.5 0.12 AS1141.6.1.11

28 0.00 7.20 1.04 51.10 0.33 AS1141.11.1

29 0.0 5.7 -0.12 50.8 0.23 #

30 0 6.1 0.19 51.9 0.61 AS1141.11.1

33 0 12.0 4.74 § 51.7 0.54 AS1141.11

36 0 6.1 0.19 52.4 0.78 AS1141.11.1

37 0.0 5.0 -0.66 46.7 -1.20 AS1141.11

39 0 5.6 -0.19 54.0 1.34 AS1141.11

40 0.0 6.5 0.50 49.7 -0.16 AS1141.11

41 0.0 4.1 -1.35 48.0 -0.75 AS1141.11.1

43 0 6.2 0.27 50.0 -0.05 AS1141.11

44 0.0 4.1 -1.35 53.5 1.17 AS1141.11

45 0.0 3.7 -1.66 46.3 -1.34 1141.11.1

46 0.5 5.7 -0.12 48.4 -0.61 #

47 0 4.6 -0.96 54.1 1.38 AS1141.11.1

48 0.0 7.4 1.19 49.5 -0.23 AS1141.11

49 0.0 5.7 -0.12 45.9 -1.48 AS1141.11.1 (note: pan retained 0.8%)

50 0.0 7.0 0.89 48.1 -0.71 AS1141.11

51A 0 6.0 0.12 47.4 -0.96 AS1141.11

51B 0 6.5 0.50 48.6 -0.54 AS1141.11

51C 0 5.1 -0.58 42.8 -2.56 AS1141.11

53 0.0 6.7 0.66 53.0 0.99 AS1141.11

54 0 5.3 -0.42 51.1 0.33 #

A8

SD 2.12.05

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


56 0 6.3 0.35 48.9 -0.44 AS1141.11.1

57 0 10.3 3.43 § 61.8 4.06 § #

58 0.0 3.6 -1.73 51.2 0.37

AS1141.11 Note: AS1141.11 done

without washing over 75mic sieve

60 0.0 7.1 0.96 50.9 0.26 AS1141.11.1

61 0.0 5.5 -0.27 54.8 1.62 AS1141.11

62 0 6.6 0.58 54.4 1.48 1141.11

63 0.0 4.63 -0.94 51.58 0.50 AS1141.11.1

64 0.0 3.0 -2.20 53.2 1.06 #

65 5.0 -0.66 45.8 -1.51 Q103B

66 0 6.0 0.12 54.0 1.34 AS1141.11

67A 0.0 5.0 -0.66 51.7 0.54 WA210-1

67B 0.0 6.2 0.27 49.0 -0.40 WA 210.1

67C 0.0 7.6 1.35 48.1 -0.71 AS 210.1

68 0.0 5.5 -0.27 51.3 0.40 AS1141.11 (unwashed)

69 0.0 4.7 -0.89 48.1 -0.71 AS1141.11.1

71 0.0 1.1 -3.66 § 61.4 3.92 § AS1289.3.6.1

76 0.0 5.3 -0.42 48.9 -0.44 AS1141.11.1

77 0.0 4.5 -1.04 51.9 0.61 AS1141.11.1

78A 0.0 6.7 0.66 48.1 -0.71 AS1141.11.1

78B 0.0 6.9 0.81 50.6 0.16 AS1141.11.1

78C 0.0 4.9 -0.73 49.8 -0.12 AS1141.11.1

79 # 94.7* na 49.8* na 1141.11

No. of Results:

60 60

60

Median: 5.85 50.15 Normalised

IQR: 1.30

2.87

Robust CV: 22.2% 5.7% Uncertainty of median:

0.21

0.46

Minimum: 1.1 41.0

Maximum: 13.5 61.8

Range: 12.4 20.8

A9

SD 2.12.05

A10

SD 2.12.05

Particle Size Distribution (nearest 0.1%)

Laboratory Code 9.5 mm Robust


1 31.1 -2.09 4.6 -0.30 1141.11

2 6.4 -10.26 § 5.0 0.00 Q103B (AS1141.11)

4 34.6 -0.93 5.5 0.37 AS1141.11.1

5 39.3 0.63 5.0 0.00 AS1141.11

9 40.0 0.86 0.5 -3.33 § AS1141.11.1

10 31.7 -1.89 9.0 2.96 EN 933-1

11 38.4 0.33 4.8 -0.15 AS1141.11

12 37.8 0.13 5.6 0.44 Q103B

16 34.3 -1.03 5.7 0.52 AS1141.11.1

17 37.5 0.03 5.7 0.52 AS1141.11

18 38.3 0.30 5.0 0.00 MS30:Part 4

19 41.3 1.29 4.9 -0.07 AS1141.11.1

20 34.2 -1.06 4.0 -0.74 AS1141.11.1

23 46 2.85 6 0.74 AS1141.11.1

24 40.4 0.99 6.5 1.11 Q103B-1996

25 94.3* na 99.6* na 1141.11.1

26 34.9 -0.83 5.5 0.37 1141.11.1

27 34.9 -0.83 4.7 -0.22 AS1141.6.1.11

28 36.80 -0.20 4.20 -0.59 AS1141.11.1

29 36.1 -0.43 6.4 1.03 #

30 35.3 -0.70 5.6 0.44 AS1141.11.1

33 31.2 -2.05 3.8 -0.89 AS1141.11

36 36.4 -0.33 4.2 -0.59 AS1141.11.1

37 41.7 1.42 0.6 -3.25 § AS1141.11

39 35.8 -0.53 3.9 -0.81 AS1141.11

40 34.9 -0.83 0.5 -3.33 § AS1141.11

41 39.6 0.73 7.3 1.70 AS1141.11.1

43 37.2 -0.07 5.7 0.52 AS1141.11

44 36.5 -0.30 0.5 -3.33 § AS1141.11

45 41.2 1.26 7.3 1.70 1141.11.1

46 40.2 0.93 4.0 -0.74 #

47 33.7 -1.22 6.2 0.89 AS1141.11.1

48 38.5 0.36 4.5 -0.37 AS1141.11

49 40.6 1.06 7.0 1.48 AS1141.11.1 (note: pan retained 0.8%)

50 37.4 0.00 5.9 0.67 AS1141.11

51A 39.3 0.63 0.7 -3.18 § AS1141.11

51B 37.7 0.10 0.7 -3.18 § AS1141.11

51C 44.2 2.25 0.6 -3.25 § AS1141.11

53 36.1 -0.43 4.1 -0.67 AS1141.11

54 37.7 0.10 5.1 0.07 #

A11

SD 2.12.05

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 9.5 mm Robust


56 37.7 0.10 6.0 0.74 AS1141.11.1

57 25.8 -3.84 § 1.9 -2.29 #

58 36.0 -0.46 7.6 1.92

AS1141.11 Note: AS1141.11 done

without washing over 75mic sieve

60 35.9 -0.50 5.2 0.15 AS1141.11.1

61 33.6 -1.26 0.6 -3.25 § AS1141.11

62 32.5 -1.62 5.4 0.30 1141.11

63 37.05 -0.12 5.4 0.30 AS1141.11.1

64 37.6 0.07 0.5 -3.33 § #

65 41.5 1.36 6.7 1.26 Q103B

66 33.0 -1.46 5.0 0.00 AS1141.11

67A 37.9 0.17 4.5 -0.37 WA210-1

67B 39.2 0.60 4.6 -0.30 WA 210.1

67C 37.2 -0.07 6.2 0.89 AS 210.1

68 37.5 0.03 4.6 -0.30 AS1141.11 (unwashed)

69 40.3 0.96 5.9 0.67 AS1141.11.1

71 28.1 -3.08 § 0.5 -3.33 § AS1289.3.6.1

76 38.9 0.50 5.9 0.67 AS1141.11.1

77 36.2 -0.40 5.5 0.37 AS1141.11.1

78A 38.3 0.30 6.2 0.89 AS1141.11.1

78B 37.4 0.00 4.3 -0.52 AS1141.11.1

78C 38.3 0.30 6.1 0.81 AS1141.11.1

79 61.6* na 99.6* na 1141.11

No. of Results:

60 60

Median: 37.40 5.00 Normalised

IQR: 3.02 1.35

Robust CV: 8.1% 27.1% Uncertainty of median:

0.49 0.22

Minimum: 6.4 0.5 Maximum: 46.0 9.0

Range: 39.6 8.5

A12

SD 2.12.05

A13

SD 2.12.05



z-score Method

2 9 -1.80 Q201

4 11 -0.90 AS1141.15

5 11 -0.90 AS1141.15

9 10 -1.35 AS1141.15

10 8 -2.25 EN 933-3

12 11 -0.90 Q201

16 14 0.45 AS1141.15

18 14 0.45 MS30:Part 5

19 9 -1.80 AS1141.15

23 14 0.45 AS1141.15

24 11.0 -0.90 Q103B-1996

26 8.0 -2.25 1141.15

27 9 -1.80 AS1141.15

29 15 0.90 AS1141.15

30 11 -0.90 AS1141.15

33 17 1.80 AS1141.15

36 11 -0.90 AS1141.15

37 11 -0.90 AS1141.15

39 13 0.00 AS1141.15

40 12 -0.45 AS1141.15

41 13 0.00 AS1141.15

44 12 -0.45 AS1141.15

45 14 0.45 1141.15

47 14 0.45 AS1141.11.1

51A 16 1.35 AS1141.15

51B 14 0.45 AS1141.15

51C 14 0.45 AS1141.15

56 10 -1.35 AS1141.15

60 13 0.00 AS1141.15

61 13 0.00 AS1141.15

62 13 0.00 1141.15

65 11.0 -0.90 Q201

66 16.0 1.35 AS1141.15



z-score Method

67A 12 -0.45 WA 216-1

67B 13 0.00 WA 216.1

67C 11 -0.90 WA 216.1

68 13 0.00 AS1141.15

69 9 -1.80 AS1141.15

76 15 0.90 AS1141.15.1999

77 14 0.45 AS1141.15

78A 14 0.45 AS1141.15

78B 15 0.90 AS1141.15

78C 15 0.90 AS1141.15

No. of

Results 43

Median 13.0

Normalised IQR

2.2

Robust CV 17.1%


0.4

Minimum 8

Maximum 17

Range 9

A14

SD 2.12.05

Dry Strength Loss at Nominated Load (nearest 0.1%)


z-score Method

4 5.9 -3.04 § AS1141.22

5 8.2 -0.45 AS1141.22

9 9.5 1.01 AS1141.22

12 8.3 -0.34 Q205A

19 7.3 -1.46 AS1141.22

20 7.8 -0.90 AS1141.22

23 7.4 -1.35 AS1141.22

24 10 1.57 Q205A - 2013

26 8.6 0.00 1141.22

27 8.0 -0.67 AS1141.22 (6.2)

28 7.40 -1.35 AS1141.22

29 8.8 0.22 AS1141.22

30 8.6 0.00 AS1141.22

33 7.6 -1.12 AS1141.22

36 8.8 0.22 AS1141.22

39 8 -0.67 AS1141.22, 6.2

40 7.3 -1.46 AS1141.22

41 9.6 1.12 AS1141.22

44 8.8 0.22 AS1141.22

47 9.5 1.01 AS1141.22

50 9.0 0.45 AS1141.22

51A 9.3 0.79 AS1141.22

51B 8.1 -0.56 AS1141.22

51C 8.2 -0.45 AS1141.22

56 8.6 0.00 AS1141.22

60 8.4 -0.22 AS1141.22

62 9.8 1.35 1141.22

65 9.2 0.67 Q205

68 9.9 1.46

AS1141.22 (Part 6.2, dry

condition only)

76 8.4 -0.22 AS1141.22.1996

Dry Strength Loss at Nominated Load

(nearest 0.1%) Laboratory

Code Result Robust z-score Method

78A 8.1 -0.56 AS1141.22

78B 9.3 0.79 AS1141.22

78C 9.0 0.45 AS1141.22

No. of

Results 33

Median 8.60

Normalised IQR

0.89

Robust CV 10.3%


0.2

Minimum 5.9

Maximum 10

Range 4.1

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

A15

SD 2.12.05

SD 2.12.05

APPENDIX B

Homogeneity Testing

B1

SD 2.12.05

Homogeneity Testing

Aggregate Round 12 - Proficiency Testing Homogenei ty Results

Lab no. Individual Percent Retained (AS Sieve Size in mm) -

AS1141.11 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

14300335 5.9 54.6 33.7 4.8 14.0 8.4 2.63 2.57 2.59 1.0

14300336 5.8 52.9 35.6 4.9 14.0 9.1 2.64 2.57 2.60 0.9

14300337 5.8 51.9 36.8 5.1 14.0 8.4 2.64 2.58 2.60 0.9

14300338 5.7 52.3 36.9 5.0 13.0 9.1 2.63 2.57 2.59 1.0

14300339 5.3 52.1 37.6 4.9 13.0 8.6 2.64 2.58 2.60 0.8

14300340 5.9 50.9 37.2 5.3 13.0 8.8 2.64 2.58 2.60 0.9

14300341 5.8 54.1 36.8 4.9 13.0 8.6 2.63 2.57 2.59 0.9

14300342 5.6 52.5 37.3 4.8 14.0 8.5 2.63 2.57 2.60 0.9

Mean 5.7 52.7 36.5 5.0 13.5 8.7 2.635 2.574 2.596 0.913

Standard Deviation

0.20 1.20 1.27 0.17 0.53 0.29 0.005 0.005 0.005 0.064

Coefficient of

Variation 0.035 0.023 0.035 0.034 0.040 0.033 0.002 0.002 0.002 0.070

Lowest Value

5.3 50.9 33.7 4.8 13 8.4 2.63 2.57 2.59 0.8

Highest Value

5.9 54.6 37.6 5.3 14 9.1 2.64 2.58 2.6 1.0

SD 2.12.05

APPENDIX C

Documentation

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

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

C1

SD 2.12.05

PROFICIENCY TESTING AUSTRALIA AGGREGATES (ROUND 12) 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 – AS1141.11, perform the test on 26.5mm, 19.0mm,

13.2mm, 9.5mm 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 (180kN). 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 14 March 2014 to: Laura Galbraith Proficiency Testing Australia Fax: 02 9743 6664 Email: [email protected]

C2

SD 2.12.05

PROFICIENCY TESTING AUSTRALIA AGGREGATES (ROUND 12) 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

4.75mm


Dry Strength loss @ nominated load (nearest 0.1%)

Date of tests: Signature: Please return by 14 March 2014 to: Laura Galbraith Fax: 02 9743 6664 Email: [email protected]

SD 2.12.05

- End of Report -

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