Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bending Stiffness Index Test for Geogrid Reinforcement of Pavement Base Material
Geogrid products placed in pavement base layers apparently improve performance. Currently the only way to prove this is by evaluating full-scale roadways or laboratory-scale models of a pavement system, which is time-consuming and expensive, making them impractical on a project- or product-specific basis. Isolation of the improvement mechanism is difficult due to the multiple variables present in each component of the pavement system. The bending stiffness index test has been developed to isolate and measure geogrid performance in the base layer of a pavement system. The objective of this paper is to evaluate and refine the bending-stiffness index test described by Sprague et al. The effects of the apparatus and testing variations on the test results are addressed through a series of tests. The results show that the measured bending stiffness for a compacted base course alone is consistent with published values. In addition, the bending stiffness can be measured with enough resolution to distinguish an increased stiffness when the base course is reinforced with a geogrid. Also, the measured bending stiffness can be used to compare the effects of different geogrid products. The ability to distinguish the effect of a geogrid and to compare different geogrids decreases as the confinement stress on the base course increases.
Bending Stiffness Index Test for Geogrid Reinforcement of Pavement Base Material
Geogrid products placed in pavement base layers apparently improve performance. Currently the only way to prove this is by evaluating full-scale roadways or laboratory-scale models of a pavement system, which is time-consuming and expensive, making them impractical on a project- or product-specific basis. Isolation of the improvement mechanism is difficult due to the multiple variables present in each component of the pavement system. The bending stiffness index test has been developed to isolate and measure geogrid performance in the base layer of a pavement system. The objective of this paper is to evaluate and refine the bending-stiffness index test described by Sprague et al. The effects of the apparatus and testing variations on the test results are addressed through a series of tests. The results show that the measured bending stiffness for a compacted base course alone is consistent with published values. In addition, the bending stiffness can be measured with enough resolution to distinguish an increased stiffness when the base course is reinforced with a geogrid. Also, the measured bending stiffness can be used to compare the effects of different geogrid products. The ability to distinguish the effect of a geogrid and to compare different geogrids decreases as the confinement stress on the base course increases.
Bending Stiffness Index Test for Geogrid Reinforcement of Pavement Base Material
Shields, Jr., M. K. (Autor:in) / Sprague, C. J. (Autor:in) / Gilbert, R. B. (Autor:in) / Allen, S. R. (Autor:in)
Geo-Frontiers Congress 2005 ; 2005 ; Austin, Texas, United States
09.10.2005
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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