Details:

Creators:
Ahmed, Ananna ; Aziz, Syeda R. ; Sabahfar, Nassim ; Hossain, Mustaque
Ahmed, Ananna ; Aziz, Syeda R. ; Sabahfar, Nassim ; Hossain, Mustaque Less -
Corporate Creators:
Kansas State University. Transportation Center
Corporate Contributors:
Kansas. Dept. of Transportation. Bureau of Research
Subject/TRT Terms:
[+]
Pavement Performance Superpave
Publication/ Report Number:
K-TRAN: KSU-12-4
Resource Type:
Tech Report
Geographical Coverage:
Kansas
Corporate Publisher:
Kansas. Dept. of Transportation. Bureau of Research
Abstract:
Approximately 89% of 11,000 miles of Kansas roads are surfaced with asphalt. Hundreds of thousands of tons

of reclaimed asphalt pavement (RAP) are produced annually in the United States, including in Kansas. This bulk

volume of RAP must be economically managed in order to achieve environmental friendliness. Recycling of RAP

conserves natural resources and reduces landfill usage. However, many agencies have reported that increased RAP

content produces drier hot-mix asphalt (HMA) mixtures than virgin mixtures that are susceptible to premature

cracking.

In this research, laboratory-produced Superpave HMA mixtures containing increased percentages (20, 30, and

40%) of RAP materials from three RAP sources (Shilling Construction Co., Konza Construction Co., and the Kansas

Department of Transportation project, US-73) were studied for cracking performance. Mix designs were produced

using Superpave design criteria for 12.5-mm nominal maximum aggregate size mixture. The static and repetitive

Semicircular Bending (SCB) test, the Texas Overlay Tester test, the dynamic modulus test, and Simplified Viscoelastic

Continuum Damage (S-VECD) tests were performed on laboratory-prepared samples. In general, cracking

performance decreased with increased RAP content. The RAP from the US-73 project performed most consistently

compared to other two sources of RAP. Test results were analyzed using two-way Analysis of Variance (ANOVA),

proving that mixtures containing 4.5% to 4.9% binder performed the best against cracking. The RAP source was found

to have more effect on cracking propensity than RAP content. Mixtures with RAP content up to 40% performed

satisfactorily. Tukey’s pairwise comparison method was used to compare results from all tests; S-VECD was

determined to be the most appropriate test to evaluate cracking propensity of HMA mixtures.


Format:
PDF
Funding:
C1918
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:b2852c0479027148efbf3057997cdd53285b7124294f643451e41b7f96e08b50
Download URL:
https://rosap.ntl.bts.gov/view/dot/30784/dot_30784_DS1.pdf
File Type:

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