Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of antistrip additives on surface free energy characteristics of asphalt binders for moisture-induced damage potential
In this study, the effect of antistrip additives on asphalt binders was evaluated by both laboratory tests and a proposed chemical model of asphalt binder based on the surface free energy characteristics. Two performance graded asphalt binders, namely, PG 64-22 and PG 70-28 and two amine-based liquid antistrip additives, namely, AD-Here Plus and Redicote E-6 were evaluated at different percentages (0.25 %, 0.75 %, and 1.5 %). It was found that 1.5 % AD-Here HP Plus and 1.5 % Redicote E-6 increased the total SFE (surface free energy) of PG 64-22 by 67 % and 208 %, respectively,. Also, the acid components of PG 64-22 and PG 70-28 are 2.9 dyne/cm and 2.5 dyne/cm, respectively, whereas, the corresponding base components are 0.4 dyne/cm for both. With the addition of 1.5 % Redicote E-6 in PG 64-22, the acid component of the binder reduced by 92 % and the base component of the binder increased by 1141 %. Finally, in this study it was found that DWPM (Dynamic Wilhelmy Plate Method) is an excellent tool for evaluating total SFE and acid-base components of SFE of asphalt binders with and without antistrip additives. The effect of short term aging, long term aging, and temperature susceptibility of antistrip additives are currently under investigation.
Effect of antistrip additives on surface free energy characteristics of asphalt binders for moisture-induced damage potential
In this study, the effect of antistrip additives on asphalt binders was evaluated by both laboratory tests and a proposed chemical model of asphalt binder based on the surface free energy characteristics. Two performance graded asphalt binders, namely, PG 64-22 and PG 70-28 and two amine-based liquid antistrip additives, namely, AD-Here Plus and Redicote E-6 were evaluated at different percentages (0.25 %, 0.75 %, and 1.5 %). It was found that 1.5 % AD-Here HP Plus and 1.5 % Redicote E-6 increased the total SFE (surface free energy) of PG 64-22 by 67 % and 208 %, respectively,. Also, the acid components of PG 64-22 and PG 70-28 are 2.9 dyne/cm and 2.5 dyne/cm, respectively, whereas, the corresponding base components are 0.4 dyne/cm for both. With the addition of 1.5 % Redicote E-6 in PG 64-22, the acid component of the binder reduced by 92 % and the base component of the binder increased by 1141 %. Finally, in this study it was found that DWPM (Dynamic Wilhelmy Plate Method) is an excellent tool for evaluating total SFE and acid-base components of SFE of asphalt binders with and without antistrip additives. The effect of short term aging, long term aging, and temperature susceptibility of antistrip additives are currently under investigation.
Effect of antistrip additives on surface free energy characteristics of asphalt binders for moisture-induced damage potential
Wirkung von antistrip-Zusätzen auf die freien Oberflächenenergie-Kennwerte von Asphaltbindemitteln für das Feuchtigkeits induzierte Schädigungspotenzial
Wasiuddin, Nazimuddin M. (Autor:in) / Fogle, Chris M. (Autor:in) / Zaman, Musharraf M. (Autor:in) / O'Rear, Edgar A. (Autor:in)
Journal of Testing and Evaluation ; 35 ; 36-44
2007
9 Seiten, 5 Bilder, 3 Tabellen, 25 Quellen
Aufsatz (Zeitschrift)
Englisch
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