{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/49548"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/49548","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Estimation of asphalt binder viscosity using ultrasonic guided waves","abstract":"The viscosity of asphalt binder is of significant interest to those in the pavement industry. When a particular binder is selected for use in a pavement design, it must be rigid enough to support traffic loads and maintain its shape throughout its service life. However, it must not be so rigid that it fails when subjected to low temperatures or high stress levels. Additionally, binder must be sufficiently fluid so that good mixing and compaction are attainable during construction. Traditionally, binder viscosity is measured using capillary or rotational viscometers. However, due to equipment limitations, the use of these viscometers can be tedious and time consuming. A study to investigate the feasibility of using ultrasonic waveguides to measure the viscosity of asphalt binder as a function of temperature is presented. It was observed that the fundamental torsional mode of a solid, cylindrical waveguide is sensitive to the viscosities of different performance graded (PG) binders. End-of-waveguide reflections were measured and correlated to viscosity values determined by a rotational viscometer. Additionally, the device’s sensitivity to aging was investigated by testing binder in situ as it suffered prolonged exposure to heat and by testing samples that had been oven-aged. The device was shown to be sensitive to variations in viscosity, whether due to the materials belonging to different PG grades or because they had been subjected to different amounts of aging. From the results of this study, the proposed guided wave system is suggested for further study and eventual implementation in the asphalt industry.","abstract_html":"The viscosity of asphalt binder is of significant interest to those in the pavement industry. When a particular binder is selected for use in a pavement design, it must be rigid enough to support traffic loads and maintain its shape throughout its service life. However, it must not be so rigid that it fails when subjected to low temperatures or high stress levels. Additionally, binder must be sufficiently fluid so that good mixing and compaction are attainable during construction. Traditionally, binder viscosity is measured using capillary or rotational viscometers. However, due to equipment limitations, the use of these viscometers can be tedious and time consuming. A study to investigate the feasibility of using ultrasonic waveguides to measure the viscosity of asphalt binder as a function of temperature is presented. It was observed that the fundamental torsional mode of a solid, cylindrical waveguide is sensitive to the viscosities of different performance graded (PG) binders. End-of-waveguide reflections were measured and correlated to viscosity values determined by a rotational viscometer. Additionally, the device’s sensitivity to aging was investigated by testing binder in situ as it suffered prolonged exposure to heat and by testing samples that had been oven-aged. The device was shown to be sensitive to variations in viscosity, whether due to the materials belonging to different PG grades or because they had been subjected to different amounts of aging. From the results of this study, the proposed guided wave system is suggested for further study and eventual implementation in the asphalt industry.","abstract_has_math":false,"creators":["Haser, Alexandra"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Systems & Entrepreneurial Engr","degree_department":null,"school":null,"contributors":["Reis, Henrique M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-05-30T16:49:26Z","date_published":"2014-05-30T16:49:26Z","updated_at":"2026-07-22T22:25:38Z","subjects":["viscosity","guided waves","ultrasonic","asphalt binder"],"languages":["en"],"rights":["Copyright 2014 Alexandra Haser"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/49548","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Reis, Henrique M."]},{"key":"dc:creator","label":"Author","values":["Haser, Alexandra"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-05-30T16:49:26Z","2014-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Systems & Entrepreneurial Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["viscosity","guided waves","ultrasonic","asphalt binder"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2014 Alexandra Haser"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/49548"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The viscosity of asphalt binder is of significant interest to those in the pavement industry. When a particular binder is selected for use in a pavement design, it must be rigid enough to support traffic loads and maintain its shape throughout its service life. However, it must not be so rigid that it fails when subjected to low temperatures or high stress levels. Additionally, binder must be sufficiently fluid so that good mixing and compaction are attainable during construction. Traditionally, binder viscosity is measured using capillary or rotational viscometers. However, due to equipment limitations, the use of these viscometers can be tedious and time consuming. A study to investigate the feasibility of using ultrasonic waveguides to measure the viscosity of asphalt binder as a function of temperature is presented. It was observed that the fundamental torsional mode of a solid, cylindrical waveguide is sensitive to the viscosities of different performance graded (PG) binders. End-of-waveguide reflections were measured and correlated to viscosity values determined by a rotational viscometer. Additionally, the device’s sensitivity to aging was investigated by testing binder in situ as it suffered prolonged exposure to heat and by testing samples that had been oven-aged. The device was shown to be sensitive to variations in viscosity, whether due to the materials belonging to different PG grades or because they had been subjected to different amounts of aging. From the results of this study, the proposed guided wave system is suggested for further study and eventual implementation in the asphalt industry.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2014-04-18T13:28:29Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Haser_Alexandra.zip: 5533098 bytes, checksum: 06f7e1831c22b901f6c2c731ec103893 (MD5) Haser_Alexandra.pdf: 2743503 bytes, checksum: 738efc89907173e3d57a39a11f855a59 (MD5)","Made available in DSpace on 2014-05-30T16:49:26Z (GMT). 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Additionally, binder must be sufficiently fluid so that good mixing and compaction are attainable during construction. Traditionally, binder viscosity is measured using capillary or rotational viscometers. However, due to equipment limitations, the use of these viscometers can be tedious and time consuming. A study to investigate the feasibility of using ultrasonic waveguides to measure the viscosity of asphalt binder as a function of temperature is presented. It was observed that the fundamental torsional mode of a solid, cylindrical waveguide is sensitive to the viscosities of different performance graded (PG) binders. End-of-waveguide reflections were measured and correlated to viscosity values determined by a rotational viscometer. Additionally, the device’s sensitivity to aging was investigated by testing binder in situ as it suffered prolonged exposure to heat and by testing samples that had been oven-aged. The device was shown to be sensitive to variations in viscosity, whether due to the materials belonging to different PG grades or because they had been subjected to different amounts of aging. From the results of this study, the proposed guided wave system is suggested for further study and eventual implementation in the asphalt industry.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2014-04-18T13:28:29Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Haser_Alexandra.zip: 5533098 bytes, checksum: 06f7e1831c22b901f6c2c731ec103893 (MD5) Haser_Alexandra.pdf: 2743503 bytes, checksum: 738efc89907173e3d57a39a11f855a59 (MD5)","Made available in DSpace on 2014-05-30T16:49:26Z (GMT). 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