Coatings to Improve Low-Quality Local Aggregates for Hot Mix Asphalt Pavements

Kim, Min-Gu; Button, Joe W.; Park, Dae-Wook

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Coatings to Improve Low-Quality Local Aggregates for Hot Mix Asphalt Pavements

1999-11-01
By Kim, Min-Gu ; Button, Joe W. ; Park, Dae-Wook

File Language:

English

Details

Creators:

Kim, Min-Gu ; Button, Joe W. ; Park, Dae-Wook
Corporate Contributors:

Southwest Region University Transportation Center (U.S.) ; Texas Transportation Institute
Subject/TRT Terms:
Publication/ Report Number:

SWUTC/99/167405-1
Resource Type:

Research Paper
Geographical Coverage:

Texas ; United States
TRIS Online Accession Number:

00790662
OCLC Number:

43896436
Corporate Publisher:

Southwest Region University Transportation Center (U.S.)
Abstract:

A laboratory investigation was conducted wherein smooth, rounded, siliceous river gravel aggregates were coated with fine-grained polyethylene, carpet co-product, or cement plus styrene butadiene rubber latex and used to prepare hot mix asphalt concrete specimens. Only the coarse (+ No. 4) aggregates were coated. The concept was that the coatings would enhance surface roughness of the aggregates and, thus, produce asphalt mixtures with superior engineering properties. Hot mix asphalt specimens were prepared and evaluated using several standard and nonstandard test procedures. Based on experiences during the coating processes and analyses of these limited test results, the following was concluded: all three aggregate coating materials increased Hveem and Marshall stability, tensile strength, resilient modulus (stiffness), and resistance to moisture damage of the asphalt mixture and reduced the energy required to achieve a given level of compaction. These findings are indicative of improved resistance to rutting and cracking in hot mix asphalt pavements fabricated using coated gravel aggregates in comparison with similar uncoated aggregates.
Format:

PDF
Funding:

10727
Download URL:

https://rosap.ntl.bts.gov/view/dot/38855/dot_38855_DS1.pdf
File Type:

[PDF - 933.56 KB]
Collection(s):

University Transportation Centers ; US Transportation Collection
Main Document Checksum:

urn:sha256:8dff4248b81bbf742008734d2a38cdf44e0e8de5557ee672c1c2f1c3780126d6

File Language:

English

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