2026-09-21T20:55:38Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/49548 2023-07-11 col_2142_5131 col_2142_16359 com_2142_5130 com_2142_16358 com_2142_234

viscosity guided waves ultrasonic Estimation of asphalt binder viscosity using ultrasonic guided waves text Reis, Henrique M. Haser, Alexandra 2014-05-30T16:49:26Z 2014-05-30T16:49:26Z 2014-05 2014-05-30T16:49:26Z 2014-05 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 Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2014-04-18T13:28:29Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: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). No. of bitstreams: 3 Alexandra_Haser.pdf: 2743503 bytes, checksum: 738efc89907173e3d57a39a11f855a59 (MD5) Haser_Alexandra.zip: 5533098 bytes, checksum: 06f7e1831c22b901f6c2c731ec103893 (MD5) license.txt: 4068 bytes, checksum: efe7cc0c10b01af4cc71f1b426938a9f (MD5) http://hdl.handle.net/2142/49548 en Copyright 2014 Alexandra Haser asphalt binder Industrial&Enterprise Sys Eng 1422 Systems & Entrepreneurial Engr 3846 University of Illinois at Urbana-Champaign Thesis M.S. MS:Sys & Entreprnural Eng-UIUC 10KS3846MS