NCHRP 09-26 Phase 3
Precision Estimates for AASHTO Test Method T308 and the Test Methods for Performance-Graded Asphalt Binder in AASHTO Specification M320
The paper can be found here:
NCHRP Web Document 71
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NCHRP 09-26 Phase 2
An Investigation of the Cause of Variation in HMA Bulk Specific Gravity Test Results Using Non-Absorptive Aggregates
The paper can be found here:
NCHRP Web Document 66
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NCHRP 09-26 Phase 1
Precision Estimates of Selected Volumetric Properties of HMA Using Non-Apsorptive Aggregate
The paper can be found here:
NCHRP Web Document 54
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NIST Research
AMRL staff is currently assisting BFRL research in the Virtual Cement and Concrete Testing Laboratory. The research strives to develop a virtual testing system. The system will expedite the research and development process by reducing the amount of testing required for cement and concrete.
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Your Assistance is Needed for an ILS!
See the message to the right learn more on the latest Interlaboratory Study the AMRL is conducting to further increase our knowledge in the realm of testing standards.
- Or - Click here to request more information!
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Joint Research
The AMRL and the Cement and Concrete Reference Laboratory (CCRL) conduct a program in association with the NIST Building and Fire Research Laboratory (BFRL) research program. A Research Task Group, consisting of representatives of AASHTO, ASTM, and CCRL, performs program oversight. The combined research program has four components:
1. Standards development support
2. Externally funded research
3. Cooperative research with BFRL divisions
4. Technology development and deployment
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NCHRP Research
The AMRL is currently working under NCHRP Project 09-26, Precision Statements for AASHTO Standard Methods of Test. The National Cooperative Highway Research Program (NCHRP) has allotted funding for continued research in precision statement development. This includes:
1. Continued research on AASHTO T312 and other test methods using absorptive aggregate.
2. Use of existing AMRL proficiency sample data to evaluate current precision statements in materials testing standards.
3. Additional interlaboratory study high priority areas.
Two NCHRP 09-26 projects are currently underway. One data mining project and one ILS. Two additional projects have already been completed. Links to these reports can be found in the left-hand column of this page.
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Your Assistance is Needed!
This fall the AMRL will be conducting an Interlaboratory Study using absorptive aggregates in compacted gyratory specimens and Rice specimens. For those involved in earlier AMRL studies, this is a continuation of the Phase 1 ILS from NCHRP 09-26.
Click here if you'd like to receive more information about getting involved in this important part of test method development!
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