TY - JOUR
T1 - Engineering Characteristics and Stabilization Performance of Aggregate Quarry By-Products From Different Sources and Crushing Stages
AU - Hou, Wenting
AU - Qamhia, Issam
AU - Mwumvaneza, Vincent
AU - Tutumluer, Erol
AU - Ozer, Hasan
N1 - Funding Information:
This publication is based on the results of ICT-R27-125 project which focused on characterizing quarry by-products in pavement applications. ICT-R27-125 was conducted in cooperation with the Illinois Center for Transportation; the Illinois Department of Transportation, Office of Program Development; and the U.S. Department of Transportation, Federal Highway Administration. The final report of the ICT R27-125 project, entitled, Sustainable Aggregates Production: Green Applications for Aggregate By-Products, can be accessed via https://apps.ict.illinois.edu/projects/getfile.asp?id=3507. The authors would like to acknowledge Pengcheng Wang and Joshua S. Cheung, graduate students at the University of Illinois at Urbana-Champaign, for their help with the laboratory work. Cooperation and support of the Illinois Association of Aggregate Producers is greatly appreciated. The contents of this paper reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. This paper does not constitute a standard, specification, or regulation.
Publisher Copyright:
© Copyright © 2019 Hou, Qamhia, Mwumvaneza, Tutumluer and Ozer.
PY - 2019/11/19
Y1 - 2019/11/19
N2 - Quarry by-products (QB), usually <1/4 in. (6 mm) in size, are the residual deposits from the production of required grades of aggregate. This paper provides findings of a detailed laboratory study with the objective of characterizing the engineering properties of QB materials produced in the primary, secondary, and tertiary aggregate production stages from four different quarries operating in Illinois. Property tests were conducted for determining aggregate gradation, morphological shape characteristics, compaction properties (moisture-density), chemical composition, and strength properties of QB samples. Since the unconfined compressive strength for QB materials is relatively low, chemical admixture stabilizers such as Portland cement and Class C fly ash were used to improve the strength properties. This study aims at evaluating properties governing the untreated and stabilized strength of QBs such as source variation, compacted density, chemical composition, gradation, particle shape and angularity, as well as the uniformity of distribution and the effectiveness of stabilizer. QB samples treated with 2% cement or 10% Class C fly ash by dry weight were found to be 10–30 times stronger than the virgin QB samples. Such significant increases in the strength of stabilized QB materials observed may indicate suitability of QBs for sustainable pavement applications.
AB - Quarry by-products (QB), usually <1/4 in. (6 mm) in size, are the residual deposits from the production of required grades of aggregate. This paper provides findings of a detailed laboratory study with the objective of characterizing the engineering properties of QB materials produced in the primary, secondary, and tertiary aggregate production stages from four different quarries operating in Illinois. Property tests were conducted for determining aggregate gradation, morphological shape characteristics, compaction properties (moisture-density), chemical composition, and strength properties of QB samples. Since the unconfined compressive strength for QB materials is relatively low, chemical admixture stabilizers such as Portland cement and Class C fly ash were used to improve the strength properties. This study aims at evaluating properties governing the untreated and stabilized strength of QBs such as source variation, compacted density, chemical composition, gradation, particle shape and angularity, as well as the uniformity of distribution and the effectiveness of stabilizer. QB samples treated with 2% cement or 10% Class C fly ash by dry weight were found to be 10–30 times stronger than the virgin QB samples. Such significant increases in the strength of stabilized QB materials observed may indicate suitability of QBs for sustainable pavement applications.
KW - X-ray fluorescence
KW - admixture stabilization
KW - aggregate
KW - aggregate packing
KW - engineering properties
KW - quarry by-product
KW - sustainable pavement applications
KW - unconfined compressive strength
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U2 - 10.3389/fbuil.2019.00130
DO - 10.3389/fbuil.2019.00130
M3 - Article
AN - SCOPUS:85076703921
SN - 2297-3362
VL - 5
JO - Frontiers in Built Environment
JF - Frontiers in Built Environment
M1 - 130
ER -