Journal Published Online: 19 February 2018
Volume 7, Issue 1

Determining the Optimum Content and Stirring Time of Emerging Dry Polymer for Asphalt Using Rotational Viscometer, Dynamic Shear Rheometer, and Atomic Force Microscopy

CODEN: ACEMF9

Abstract

During the past decades, styrene-butadiene-styrene (SBS) triblock copolymer has been used to produce Polymer-Modified Asphalt (PMA) to make asphalt pavements more resistant to both rutting at a high temperature and cracking at a low temperature. However, the process of adding SBS copolymer to asphalt requires additional equipment such as high-shear mixing equipment, and the produced PMA is required to be stored in a separate tank. To overcome these limitations associated with the production handling, the pelletized SBS-based compound was developed. It can be added to the pugmill using a dry process together with asphalt and aggregates at the asphalt plant. The main objective of this study is to identify the proper melting time for the pelletized SBS-based compound in asphalt and to determine the optimum amount of the pelletized SBS-based compound. In this study, to characterize the pelletized SBS-based compound, atomic force microscopy (AFM), a dynamic shear rheometer (DSR), and a rotational viscometer (RV) were used. Based on the laboratory test results, optimum quantity and mixing time of pelletized SBS-based compound were identified.

Author Information

Bozorgzad, Ashkan
Department of Civil and Environmental Engineering, The University of Iowa, Iowa City, IA
Kim, Yongjoo
Korea Institute of Construction Technology, Ilsanseo-gu, Goyang-si, Gyeonggi-do, Republic of Korea
Lee, Hosin “David”
Department of Civil and Environmental Engineering, The University of Iowa, Iowa City, IA
Pages: 13
Price: $25.00
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Details
Stock #: ACEM20170077
ISSN: 2379-1357
DOI: 10.1520/ACEM20170077