Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Interlaboratory Large-Scale Direct Shear Testing of Open-Graded Aggregates: Round One
The use of open-graded aggregates (OGAs) as structural backfill has become more common in the construction of bridge abutments, retaining walls, and as base layers in pavement applications. The Federal Highway Administration (FHWA) has conducted considerable strength testing of the AASHTO M 43-05 OGA gradations; however, the testing has largely been limited to locally sourced aggregates, with all tests conducted on a single type of large-scale direct shear (LSDS) device. Therefore, FHWA initiated an interlaboratory round-robin LSDS testing program to evaluate the variability in the results due to the difference between testing devices, technicians conducting the test, and source mineralogy. Six laboratories were involved in this study, testing AASHTO No. 57, No. 68, and No. 8 diabase aggregates. This paper describes the round-robin testing program and equipment differences and presents the results along with a statistical analysis of the peak, tangent, and constant volume friction and dilation angles.
Interlaboratory Large-Scale Direct Shear Testing of Open-Graded Aggregates: Round One
The use of open-graded aggregates (OGAs) as structural backfill has become more common in the construction of bridge abutments, retaining walls, and as base layers in pavement applications. The Federal Highway Administration (FHWA) has conducted considerable strength testing of the AASHTO M 43-05 OGA gradations; however, the testing has largely been limited to locally sourced aggregates, with all tests conducted on a single type of large-scale direct shear (LSDS) device. Therefore, FHWA initiated an interlaboratory round-robin LSDS testing program to evaluate the variability in the results due to the difference between testing devices, technicians conducting the test, and source mineralogy. Six laboratories were involved in this study, testing AASHTO No. 57, No. 68, and No. 8 diabase aggregates. This paper describes the round-robin testing program and equipment differences and presents the results along with a statistical analysis of the peak, tangent, and constant volume friction and dilation angles.
Interlaboratory Large-Scale Direct Shear Testing of Open-Graded Aggregates: Round One
Nicks, Jennifer E. (Autor:in) / Gebrenegus, Thomas (Autor:in) / Adams, Michael T. (Autor:in)
International Foundations Congress and Equipment Expo 2021 ; 2021 ; Dallas, Texas
IFCEE 2021 ; 361-370
06.05.2021
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Interlaboratory Large-Scale Direct Shear Testing of Open-Graded Aggregates: Round One
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