Robert LutzManagerAASHTO Materials Reference Laboratory

�Why use proficiency testing data?

�What data is available?

�How are the samples prepared?

�Data Collection

�Data Analysis

�Much data already exists

�Range of materials

�Mining the data is easy

�The process is relatively

inexpensive

�ASTM D4 supports it

� E691 – Conducting an ILS to Determine the

Precision of a Test Method

� E177 – Use of the Terms Precision and Bias in

ASTM Test Methods (explanation and examples)

� E178 – Dealing With Outlying Observations

� E2586 – Basic Statistics (relatively new)

� E2489 – Statistical Analysis of One-Sample and

Two-Sample Interlaboratory Proficiency Testing

Programs

� “Proficiency testing programs often have a greater number of participants than might be available for conducting an interlaboratory study to determine the precision of a test method (such as described in Practice E 691). Precision estimates obtained for the larger number of participants in a proficiency testing program, along with the corresponding wider variation of test conditions, can provide useful information to standards developers regarding the precision of test results that can be expected for a test method when in actual use in the general testing community.”

�Asphalt binder

�Emulsified Asphalt

�Asphalt Mixtures

�Aggregate

�Asphalt Binder 286

�Emulsified Asphalt 179

�Asphalt Mixtures 800

�Aggregate 1,544

�Soil: Classification & Compaction

�Soil: R-Value

�Soil: CBR

�Paint

� Concrete

� Portland Cement

� Blended Cement

� Masonry Cement

� Masonry Mortar

� Concrete Masonry Units

� Pozzolan

� Rebar

� D 2726 – Bulk Specific Gravity of Compacted Bituminous Mixtures

� D 2041 – Maximum Specific Gravity of Bituminous Mixtures

� D 6752 – Bulk Specific Gravity of Specimens by Means of Automatic Sealing Method

� D 6925 – Gyratory Compactor

� D 6927 – Marshall

� D 1560 – Hveem

� D 6307 – Asphalt Content by Ignition

� D 2172 – Asphalt Content by Extraction

� D 5444 – Mechanical Analysis of Extracted Aggregate

� Tests on Recovered Asphalt

� D 92 – Flash Point

� D 5 – Penetration

� D 2170 – Kinematic Viscosity

� D 2171 – Viscosity by Vacuum Capillary Viscometer

� D 70 – Specific Gravity

� D 2872 – RTFO

� D 6521 – PAV

� D 6084 – Elastic Recovery Test

� D 6648 – BBR

� D 6723 – Direct Tension

� D 7175 – DSR

� D 4402 – Rotational Viscosity

�Saybolt Viscosity

�Residue by Distillation

�Residue by Evaporation

�Tests on Residue

�#200 Wash

�Sieve Analysis

�Specific Gravity

�L.A. Abrasion

�Sulfate Soundness

�#200 Wash

�Sieve Analysis

�Specific Gravity

�Sand Equivalent

�Sulfate Soundness

�Uncompacted Void Content

�Lots of processing:

�Moving

�Spreading

�Drying

�Heating

�Sieving

�Blending

�Stirring

�And lots of:

�Recombining

�Pouring

�Mixing

�Packaging

�Shrink-wrapping

�Shipping

�Detailed

� Very clear

�Follow the current

method

�Same technician

should conduct an

individual test on both

samples

�Test results – data entered online by

laboratory

�Test method used

�Lab name, location, etc. (but never shared)

�Type of apparatus

�Lab conditions (altitude, barometric pressure,

etc.)

Material Type

Equipment

Info

Lab Info

�Robert Lutz: rlutz@amrl.net

�Ron Holsinger: rholsinger@amrl.net

�www.amrl.net