Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comparing Laboratory Conditioning Protocols to Longer-Term Aging of Asphalt Mixtures in the Southeast United States
This paper uses mixture tests on cores from a full-scale and untrafficked test section to evaluate mixture conditioning protocols intended to simulate asphalt mixture damage experienced from non–load-associated environmental factors. Seven protocols were evaluated against up to 5 years of aging in a hot climate. After matching conditioning protocols to field aging with multiple mixture tests, this paper places secondary emphasis on selecting a suitable mixture test to detect mixture damage caused by non–load-associated environmental factors or laboratory damage mechanisms (i.e., oxidation, moisture, and volume change by freeze-thaw cycles). The data suggest that Cantabro mass loss was appropriate for pairing conditioning protocols to field aging and that 5 days of oven oxidation at 85°C in compacted mixtures was the least severe conditioning protocol considered (simulating 0–2 years of field aging). The protocol that conditioned field cores for 5 days of oven oxidation at 85°C followed by 14 days in 64°C water and one freeze-thaw cycle simulated 4–5 years of field aging in Columbus, Mississippi.
Comparing Laboratory Conditioning Protocols to Longer-Term Aging of Asphalt Mixtures in the Southeast United States
This paper uses mixture tests on cores from a full-scale and untrafficked test section to evaluate mixture conditioning protocols intended to simulate asphalt mixture damage experienced from non–load-associated environmental factors. Seven protocols were evaluated against up to 5 years of aging in a hot climate. After matching conditioning protocols to field aging with multiple mixture tests, this paper places secondary emphasis on selecting a suitable mixture test to detect mixture damage caused by non–load-associated environmental factors or laboratory damage mechanisms (i.e., oxidation, moisture, and volume change by freeze-thaw cycles). The data suggest that Cantabro mass loss was appropriate for pairing conditioning protocols to field aging and that 5 days of oven oxidation at 85°C in compacted mixtures was the least severe conditioning protocol considered (simulating 0–2 years of field aging). The protocol that conditioned field cores for 5 days of oven oxidation at 85°C followed by 14 days in 64°C water and one freeze-thaw cycle simulated 4–5 years of field aging in Columbus, Mississippi.
Comparing Laboratory Conditioning Protocols to Longer-Term Aging of Asphalt Mixtures in the Southeast United States
Smith, Braden T. (Autor:in) / Howard, Isaac L. (Autor:in)
26.10.2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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