Investigating use of nano coating over the aggregate surface on moisture damage of asphalt mixtures
Publish place: دومین کنفرانس بین المللی پژوهش در مهندسی، علوم و تکنولوژی
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
View: 677
This Paper With 20 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
RSTCONF02_065
تاریخ نمایه سازی: 21 شهریور 1395
Abstract:
Today, to improve adhesion between asphalt binder-aggregate and to reduce moisture susceptibility in asphalt mixtures several methods are used. One of this method is aggregate treatment using coats which cause to change aggregate polarity especially sensitive aggregate against moisture damage such as acidic aggregates. In this study, effect of nanomaterial coating on aggregate over moisture damage of HMA by means thermodynamic and mechanical methods has been probed. Aggregates used in this study are granite and limestone that have been modified by using Iron oxide and Aluminum oxide nanoparticles. Results illustrate that in comparing modified samples through nanoparticles with control samples, tensile strength ratio on moisture condition surpass dry condition. Surface free energy result shows that aggregate coat with nanoparticles lead to decrease differences between free energy of adhesion in moisture condition and dry condition and thus stripping event is diminished. Additionally, aggregate coating with use of nanoparticles led to better wettability over aggregate by asphalt binder. Nanoparticles positive performance of Iron oxide compared with Aluminum oxide nanoparticles in decreasing moisture sensitivity of asphalt mixtures built is more evident about either kind of aggregates.
Keywords:
Authors
Hossein fallahi
Department of Civil Engineering,Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran.
Amir modares
Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran