Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder

Thumbnail image of item number 1 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Thumbnail image of item number 2 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Thumbnail image of item number 3 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Thumbnail image of item number 4 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Showing 1-4 of 84 pages in this thesis.

PDF Version Also Available for Download.

Description

This research presents the results on an experimental investigation to identify the effect of polyphosphoric acid (PPA) on aging characteristics of an asphalt binder. Addition of PPA to asphalt binders is said to improve performance of flexible pavements. Asphalt binder PG 64-22 in modified and unmodified conditions was subjected to aging in the laboratory using a regular oven and also simulated short term aging using rolling thin film oven (RTFO) test. Aging experiments were conducted to analyze the extent of oxidation in terms of changes in molecular structure of the asphalt binder. These changes were appraised using Fourier transform infrared … continued below

Physical Description

xi, 72 p.: ill.

Creation Information

Ramasamy, Naresh Baboo December 2010.

Context

This thesis is part of the collection entitled: UNT Theses and Dissertations and was provided by the UNT Libraries to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 2369 times, with 4 in the last month. More information about this thesis can be viewed below.

Who

People and organizations associated with either the creation of this thesis or its content.

Author

Chair

Committee Members

Publisher

Rights Holder

For guidance see Citations, Rights, Re-Use.

  • Ramasamy, Naresh Baboo

Provided By

UNT Libraries

The UNT Libraries serve the university and community by providing access to physical and online collections, fostering information literacy, supporting academic research, and much, much more.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this thesis. Follow the links below to find similar items on the Digital Library.

Description

This research presents the results on an experimental investigation to identify the effect of polyphosphoric acid (PPA) on aging characteristics of an asphalt binder. Addition of PPA to asphalt binders is said to improve performance of flexible pavements. Asphalt binder PG 64-22 in modified and unmodified conditions was subjected to aging in the laboratory using a regular oven and also simulated short term aging using rolling thin film oven (RTFO) test. Aging experiments were conducted to analyze the extent of oxidation in terms of changes in molecular structure of the asphalt binder. These changes were appraised using Fourier transform infrared (FTIR) spectroscopy, dynamic shear rheometer (DSR), and epifluorescence microscopy tests. FTIR was used to determine the changes in major bands with addition of PPA. Stiffness and viscoelastic behaviors of asphalts were determined from the DSR test. The stiffness is measured by calculating the shear modulus, G* and the viscoelastic behavior is measured by calculating the phase angle, sin δ. Epifluorescence microscopy is a tool used to study properties of organic or inorganic substances. The morphological characteristics of PPA modified asphalt samples were observed through epifluorescence microscopy. Epifluorescence microscopy reveals the polymer phase distribution in the asphalt binders. Results of this investigation show PPA addition to asphalt binders improve G*/sin δ characteristics of asphalt binders. In addition, presence of PPA in polymer containing asphalt did not adversely affect aging of the binders.

Physical Description

xi, 72 p.: ill.

Language

Item Type

Identifier

Unique identifying numbers for this thesis in the Digital Library or other systems.

Collections

This thesis is part of the following collection of related materials.

UNT Theses and Dissertations

Theses and dissertations represent a wealth of scholarly and artistic content created by masters and doctoral students in the degree-seeking process. Some ETDs in this collection are restricted to use by the UNT community.

About | Browse this Collection

What responsibilities do I have when using this thesis?

Digital Files

When

Dates and time periods associated with this thesis.

Creation Date

  • December 2010

Added to The UNT Digital Library

  • May 4, 2011, 1:11 p.m.

Description Last Updated

  • Dec. 12, 2013, 2 p.m.

Usage Statistics

When was this thesis last used?

Yesterday: 0
Past 30 days: 4
Total Uses: 2,369
More Statistics

Interact With This Thesis

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Thumbnail image of item number 2 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Thumbnail image of item number 3 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.
Thumbnail image of item number 4 in: 'Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

Ramasamy, Naresh Baboo. Effect of Polyphosphoric Acid on Aging Characteristics of PG 64-22 Asphalt Binder, thesis, December 2010; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc33196/: accessed May 26, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .

Back to Top of Screen