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A total of 40 projects have been awarded to
study the use of scrap tires and crumb rubber in civil engineering applications. To view information about the projects completed to date, see
our Completed Projects page.
There are currently no grants available. |
Chemical
Analysis of Crumb Rubber Modified (CRM) Asphalt Binder Study
This project will involve physical and chemical analysis of asphalt
binders, physical and chemical analysis of crumb rubber modifier (CRM),
and correlations between this information and the rheological properties
of rubber-modified (R-M) asphalt binders. The following tests would
be performed:
- SHRP method analysis of asphalt binder
- Moisture content of CRM
- Ash content of CRM
- Carbon black content of CRM
- Sulfur content of CRM
- Gas Chromatography with Mass Spectroscopy
- Infrared Spectroscopy
- Differential Scanning Calorimetry
- X-Ray Differential Spectroscopy
- And more…
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Contaminant Sorption of Scrap Tire Rubber
Study
This project will include research to lay the groundwork for applications
utilizing scrap tire rubber as a contaminant sorption media. The results
of this study will provide guidelines regarding what types of scrap
tire rubber have the capacity to absorb different contaminants that
commonly lead to NPS pollution. The methods to measure such properties
will also be refined to such applications. The scope of the project
will include:
- Development of a new procedure, or adoption of an existing procedure
to practically evaluate the effectiveness of scrap tire rubber
as a sorption media for a broad range of typical contaminants
present in soil, sediment, groundwater, and stormwater runoff
(e.g., volatile organic compounds, metals, PCBs, etc.). The primary
measure of sorption effectiveness will be the partitioning coefficient
of the sorbent (scrap tire rubber).
- Establishment of the sorption behavior and capabilities of scrap
tire rubber based on the following:
- Rubber particle size (various sizes of chip & crumb)
- Rubber type (passenger vs. truck tire)
- Crumb rubber processing method (ambient vs. cryogenic grinding)
- Contaminant type (e.g., VOCs, metals, PCBs, etc.)
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Co-Polymer
Study
This project will include research to determine the feasibility of
the creation of co-polymers made with crumb rubber from scrap tires.
This study will examine the effect of different variables of crumb
rubber used in co-polymers, such as percentage, type of production
(cryogenic vs. ambient), and particle size. The results of this study
will provide information regarding various physical properties of
co-polymers made with crumb rubber, such as tensile strength, compressive
strength, elongation, percent absorption, specific gravity, and fire
resistance. The scope of the project will include:
- Literature review
- Testing of various physical properties of co-polymer samples
- Examining the effects of the following crumb rubber variables
on co-polymer properties:
- Rubber particle size
- Rubber processing method (ambient vs. cryogenic grinding)
- Amount of rubber
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Cryogenic
Rubber-Modified Asphalt Field Test Sections
This project will involve the placement of the first sections of cryogenic
rubber-modified hot mix asphalt (R-M HMA) in South Carolina. The test
sections will include several roads surrounding Clemson Memorial Stadium
(Death Valley), the access road for the Clemson Hydraulics Laboratory,
and the driveway and parking area for the new laboratory addition
to be constructed at the ARTS facility. Approximately 2,100 tons of
cryogenic R-M surface course, 600 tons of cryogenic R-M intermediate
course, and 150 tons of cryogenic R-M open-graded friction course
will be utilized.
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Feasibility
of Crumb Rubber in Microsurfacing
This project will consist of the exploration of the effect of several
different percentages of crumb rubber mixed with aggregate to meet
the required gradation from the SCDOT specification for micro surfacing.
The percentages to be tested are: •
10%
• 25%
• 50%
• 75%
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Laboratory
Performance of CRM Asphalt Mixtures Containing Vestenamers
This
project will evaluate the performance of CRM asphalt mixtures using
Vestenamer materials compared to mixtures made with conventional wet-process
CRM binder, polymer-modified binder, and virgin (un-modified) binder.
It will involve the exploration of several important mix performance
properties of hot mix asphalt (HMA), including: •
Rut resistance
• Fatigue resistance
• Moisture susceptibility
• Modulus of resilience
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Laboratory Performance of Rubber-Modified Hot Mix Asphalt (R-M HMA)
Study
This project is the next logical step to follow research on the high-temperature
and low-temperature properties of rubber-modified binders. It will
involve the exploration of the effect of several different variables
on several different mix performance properties of hot mix asphalt
(HMA) made with rubber-modified (R-M) asphalt binders. Several different
binder and aggregate sources will be used in the study, as well as
the same variables that were used in the high- and low-temperature
properties studies:
- Crumb rubber processing method (cryogenic vs. ambient)
- Type of crumb rubber (truck tire vs. passenger car tire)
- Amount of crumb rubber
- Size of crumb rubber
Some of the mixture performance properties that will be tested
include:
- Rut resistance
- Fatigue resistance
- Moisture susceptibility
- Modulus of resilience
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Laboratory
Performance of Warm Asphalt Mixtures Made with CRM Binders
The
main objective of the research project is to investigate the performance
of warm mix asphalt as compared to hot mix asphalt. The specific objectives
of the research project include the following.
• To study the performance of warm mix asphalt with respect
to hot mix asphalt in terms of indirect tensile
strength, rutting and resilient modulus.
• To study the rheological properties of the warm asphalt binder.
• To study the compatibility of warm asphalt technologies with
rubber modified asphalt binder.
• To study the compatibility of the warm asphalt technologies
with recycled asphalt pavement materials.
• To develop a systematic standard specification for the use
of warm asphalt. |
Low-Temperature
Properties of Crumb Rubber Modified (CRM) Asphalt Binder Study
This project is the next logical step to follow the research completed
by ARTS in 2003 on the high-temperature properties of rubber-modified
binders. It will involve the exploration of the effect of several
different variables on the low-temperature properties of crumb rubber-modified
asphalt binder. Several different binder sources will be used in the
study, as well as the same variables that were used in the high-temperature
properties study:
- Crumb rubber processing method (cryogenic vs. ambient)
- Type of crumb rubber (truck tire vs. passenger car tire)
- Amount of crumb rubber
- Size of crumb rubber
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Rubber-Modified
Asphalt Research
This project will involve the completion of several research projects
involving rubber-modified binder, rubber-modified open-graded friction
course, stress absorbing membrane interlayer, and reclaimed asphalt
pavement in rubber-modified mixtures. These projects were grouped
together because the results from much of the required testing can
be used for several of the projects. The projects will cover the following
topics:
- Examination of aging (or anti-aging) effects caused by interaction
of CRM with the asphalt binder in CRM binder.
- Developing high quality CRM binder to be used for OGFC and drainage
mixtures by enhancing binder properties with different combinations
of passenger car tire and truck tire rubber to modify the binder,
and by using chemical- and crumb rubber- modified binder.
- Examining the stress-absorption properties of CRM binder used
as a SAMI, such as the stress-strain relationship and the influence
of CRM type, CRM percentage, and asphalt binder source on the
stress absorption properties.
- Investigation of the resilient modulus of recycled mixtures
using CRM binders.
- Evaluation of the durability of the porous mixtures using high
quality CRM binder through strength testing, rutting resistance
testing, and Cantbra testing (abrasion test).
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Septic
Tank Tire Chip Study
1. Several different tire chip sizes will be tested:
a. 6-inch
b. 4-inch
c. 2-inch
d. 0.5-inch 2.
Leachate from the tire chip drainage layers will be measured under
the following test conditions:
a. In distilled and deionized water at pH 2, 6,
8 and 12,
b. In a typical rain water
c. In a typical hard and soft groundwater
d. In TCLP test conditions
3.
The hydraulic conductivity of the tire chip drainage layers will
be measured.
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