详情

原文传递 EVALUATION OF MIXING AND COMPACTION TEMPERATURES OF MODIFIED AND UNMODIFIED ASPHALT BINDERS

题名：	EVALUATION OF MIXING AND COMPACTION TEMPERATURES OF MODIFIED AND UNMODIFIED ASPHALT BINDERS
其他题名：	1.Asphalt Institute"Superpave Mix Design,Superpave Series No.2(SP-2)."Asphalt Institute,Lexington,KY,2001.
正文语种：	英文
作者：	Aniket V. Kataware
关键词：	temperature；binder；modified；action；compact；method；range；different；predict；recommend
摘要：	The Brookfield Rotational Viscometer (BV) is widely used to determine the mixing and compaction temperatures of different types of asphalt binders based on an equi-viscous approach, recommended by Asphalt Institute. In this approach (referred as BV method in this paper), temperatures correspond to a viscosity of a binder equal to 0.17±0.02 Pa.s and 0.28±0.03 Pa.s are considered to estimate a range of the mixing and compaction temperatures, respectively. Several researchers have reported that the BV method works reasonably well for unmodified binders, however, it may fail to determine a suitable range of temperatures for polymer and crumb rubber modified binders. This paper presents two different methods namely, Steady Shear Flow (SSF) and Phase Angle Method (PAM), conducted using Dynamic Shear Rheometer (DSR), to estimate the mixing and compaction temperatures of unmodified and modified asphalt binders. One unmodified binder, VG 30 and two modified binders: polymer modified (PMB 40) and crumb rubber modified binders (CRMB 60) were used in this study. The analyses of the data showed that mixing and compaction temperatures range for unmodified binder (VG 30) determined from the BV method was 154℃ to 160℃ and 143℃ to 148℃, respectively, which is close to the ranges mentioned in MoRTH (mixing temperature: 150℃ to 165℃, and compaction temperature: >140℃). However, this method predicted approximately 18℃ to 43℃ and 41℃ to 63℃, higher range of the mixing and compaction temperatures, respectively for modified binders (PMB 40 and CRMB 60) compared to the range listed in IRC:SP:53. The SSF and PAM methods estimated approximately 15℃ and 50℃, less mixing and compaction temperatures, respectively, for modified binders (PMB 40 and CRMB 60) when compared with the BV method. For PMB 40, the SSF method giyes approximately a similar range of mixing temperature as mentioned in IRC:SP:53. However, the compaction temperature was estimated 30℃ higher. Moreover, the SSF method predicted approximately 27℃ and 53℃ higher, mixing and compaction temperature range, respectively for CRMB 60. Likewise, the PAM method predicted the mixing and compaction temperatures range of CRMB 60 binder close to the range listed in IRC:SP:53. Overall, the three methods (i.e., BV, SSF and PAM) were found to be suitable for unmodified binder, while the SSF and PAM methods worked well for modified binders. It is expected that the approaches discussed in this paper may be helpful to revise and formulate a procedure to estimate a proper range of the mixing and compaction temperatures for modified and unmodified binders.
出版年：	2017
论文唯一标识：	I-75Y2017V45N06007
英文栏目名称：	TECHNICAL PAPERS
期刊名称：	Indian Highways
拼音刊名(出版物代码)：	I-75
卷：	45
期：	06
页码：	18-27