Enhancing and standardizing interaction of rubber particles with asphalt : final report.

Daly, William H.; Negulescu, Ioan I.; Louisiana State University. Dept. of Chemistry

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

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Enhancing and standardizing interaction of rubber particles with asphalt : final report.

1995-11-01
By Daly, William H. ; Negulescu, Ioan I.

[PDF-1.43 MB]

English

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Alternative Title:

Enhancing and standardizing interaction of rubber particles with asphalt.
Creators:

Daly, William H. ; Negulescu, Ioan I.

Daly, William H. ; Negulescu, Ioan I. Less -
Corporate Creators:

Louisiana State University. Dept. of Chemistry
Corporate Contributors:

Louisiana. Dept. of Transportation and Development
Subject/TRT Terms:

[+]

Aromatic Compounds Asphalt/Rubber/Aromatic Oils Blends Asphalt/Rubber Blends Asphalt Cement Asphalt Rubber Blends Crumb Rubber Dynamic Mechanical Analysis Mechanical Analysis PAV Aging Phase Separation Of Aged Blends SHRP Specs Stiffness Temperature TFOT Aging
Publication/ Report Number:

298
Resource Type:

Tech Report
Geographical Coverage:

Louisiana
Corporate Publisher:

Louisiana State University. Department of Chemistry
Abstract:

Addition of ground rubber particles to asphalt can enhance several fold the stiffness of the blend as reflected by G*/sin δ of the rubber-asphalt cements (RACs). Pretreatment of rubber particles with as little as 5% aromatic oil (AO) enhances the apparent compatibility of rubber with asphalt at moderate temperatures; the enhanced stiffness of the blend is retained. The most successful protocol for adding aromatic oil involves preblending of the oil with rubber before mixing with asphalt. Oil addition facilitated preparation of RACs with 15% rubber that exhibit η @ 135° C less than 3.0 Pa·s. AC-10 and AC-30 asphalt binders were blended with crumb rubber (CR) presoaked in AO and acceptable SHRP spec requirements were observed for each blend. Blends of AC-10 with 15% CR and 5% AO met the SHRP specs @ 64° C while blends of AC-30 with 15% CR and 15% AO met the specs @ 70° C. Measurement of mix stiffness using G*/sin δ at high temperatures was not possible due to inverse behavior of sin δ with temperature. The low temperature stiffness of these blends met the specifications @ -12° C (bending beam test). TFOT and PAV aging studies reveal that aromatic oil addition does not completely alleviate phase separation, but the aged blends retain satisfactory viscoelastic properties.
Format:

PDF
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:7351abfe22800db361267981f0529e1eea8ed3f8bee6df1d1a2aca2787383315
Download URL:

https://rosap.ntl.bts.gov/view/dot/22227/dot_22227_DS1.pdf
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Enhancing and standardizing interaction of rubber particles with asphalt : final report.

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