TY - JOUR
T1 - Sustainable pavement foundations with chemically stabilized quarry by-products
AU - Tutumluer, Erol
AU - Qamhia, Issam
AU - Ozer, Hasan
N1 - Funding Information:
The support for this study was provided by the Illinois Department of Transportation (IDOT) as part of the Illinois Center for Transportation (ICT) R27-168 research project. Special thanks go to IDOT Technical Review Panel, Dr. Imad Al-Qadi, Greg Renshaw, Michel Johnson, James Meister, and all the ICT students for their help during construction and testing at the Advanced Transportation Research and Engineering Laboratory (ATREL).
Funding Information:
The support for this study was provided by the Illinois Department of Transportation (IDOT) as part of the Illinois Center for Transportation (ICT) R27-168 research project. Special thanks go to IDOT Technical Review Panel, Dr. Imad Al-Qadi, Greg Renshaw, Michel Johnson, James Meister, and all the ICT students for their help during construction and testing at the Advanced Transportation Research and Engineering Laboratory (ATREL). The contents of this paper reflect the views of the authors who are responsible for the facts and the accuracy of the data presented. This paper does not constitute a standard, specification, or regulation.
Publisher Copyright:
© 2019 The authors and IOS Press.
PY - 2019
Y1 - 2019
N2 - Quarry by-products (QB) are an industrial by-product of aggregate quarry processes. They are typically less than 1/4 on. (6 mm) in size and consist of coarse, medium, and fine sand particles, and a small clay/silt fraction. Quarry by-products are found abundantly all over the crushed rock extraction facilities in Illinois where they are produced during blasting, crushing, washing, and screening operations. Recent research conducted at the Illinois Center for Transportation (ICT) has evaluated the characteristics of QB materials collected from different quarries across the State of Illinois, and studied potential uses of QB in pavement applications. Because the Unconfined Compressive Strength (UCS) for QB materials was quite low, Portland cement and Class C fly ash chemical admixture stabilizers were used to improve the strength properties of QB materials which resulted in 10 to 30 times increases in laboratory determined UCS compared to virgin unstabilized QB samples. Such significant increases observed in the strength of stabilized QB materials have indicated suitability of QB for sustainable pavement applications. Full-scale test sections were constructed next with chemically stabilized QB base/subbase applications over a subgrade having a California Bearing Ratio (CBR) of 6% to represent medium volume flexible pavement applications. The test sections were evaluated for performance using Accelerated Pavement Testing (APT), which spanned over two years to include effects of harsh winter freeze. Field testing and forensic analysis techniques included Falling Weight Deflectometer (FWD) tests before and after trafficking, hot mix asphalt coring, Dynamic Cone Penetrometer (DCP) profiling of subsurface layers, and trenching to determine actual thicknesses and contribution of each pavement layer to the measured surface rutting. In general, results from APT and forensic analyses indicated satisfactory results and improved rutting performance.
AB - Quarry by-products (QB) are an industrial by-product of aggregate quarry processes. They are typically less than 1/4 on. (6 mm) in size and consist of coarse, medium, and fine sand particles, and a small clay/silt fraction. Quarry by-products are found abundantly all over the crushed rock extraction facilities in Illinois where they are produced during blasting, crushing, washing, and screening operations. Recent research conducted at the Illinois Center for Transportation (ICT) has evaluated the characteristics of QB materials collected from different quarries across the State of Illinois, and studied potential uses of QB in pavement applications. Because the Unconfined Compressive Strength (UCS) for QB materials was quite low, Portland cement and Class C fly ash chemical admixture stabilizers were used to improve the strength properties of QB materials which resulted in 10 to 30 times increases in laboratory determined UCS compared to virgin unstabilized QB samples. Such significant increases observed in the strength of stabilized QB materials have indicated suitability of QB for sustainable pavement applications. Full-scale test sections were constructed next with chemically stabilized QB base/subbase applications over a subgrade having a California Bearing Ratio (CBR) of 6% to represent medium volume flexible pavement applications. The test sections were evaluated for performance using Accelerated Pavement Testing (APT), which spanned over two years to include effects of harsh winter freeze. Field testing and forensic analysis techniques included Falling Weight Deflectometer (FWD) tests before and after trafficking, hot mix asphalt coring, Dynamic Cone Penetrometer (DCP) profiling of subsurface layers, and trenching to determine actual thicknesses and contribution of each pavement layer to the measured surface rutting. In general, results from APT and forensic analyses indicated satisfactory results and improved rutting performance.
KW - Accelerated Pavement Testing
KW - Chemical Stabilization
KW - DCP
KW - Field Performance
KW - Nondestructive Testing
KW - Pavements
KW - Quarry By-products
KW - Sustainability
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U2 - 10.3233/ASMGE190024
DO - 10.3233/ASMGE190024
M3 - Article
AN - SCOPUS:85115833698
SN - 2212-7828
VL - 7
SP - 276
EP - 290
JO - Advances in Soil Mechanics and Geotechnical Engineering
JF - Advances in Soil Mechanics and Geotechnical Engineering
ER -