TY - JOUR
T1 - Dense-Graded Hot Mix Asphalt with 100% Recycled Concrete Aggregate Based on Thermal-Mechanical Surface Treatment
AU - Jitsangiam, Peerapong
AU - Nusit, Korakod
AU - Nikraz, Hamid
AU - Leng, Zhen
AU - Prommarin, Jitinun
AU - Chindaprasirt, Prinya
N1 - Funding Information:
Chiang Mai University and Curtin University mainly supported the work. Special thanks are extended to the Department of Civil Engineering at Curtin University, Australia, for the relevant information and the laboratory works in this study. Mr. Lachlan Maddams and Mr. Nabil Rahman should be strongly acknowledged and thanked for their main contributions to the laboratory experiment of this study. The last author would like to acknowledge the financial support of the Thailand Research Fund (TRF) under the TRF Distinguished Research Professor Grant No. DPG6180002. Moreover, the research teams of the Civil Engineering Department at Curtin University, Australia, Chiang Mai University, and Naresuan University, Thailand, are also gratefully acknowledged for providing guidance and valuable input into this work.
Publisher Copyright:
© 2021 American Society of Civil Engineers.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - Construction and demolition (C&D) waste has been annually generated in high volume due to a mega-scale of the construction industry. It causes the environmental problem of waste management requiring numerous landfill disposal areas. C&D waste can be mainly used as recycled concrete aggregate. However, C&D materials are needed for more effective utilization. Applications in road pavement are recommended to overcome this problem. Therefore, this study examined the use of recycled concrete aggregate (RCA) as a full replacement for natural aggregate (NA) in a hot mix asphalt (HMA) mixture for a heavy-duty asphalt surface. A modified thermal-mechanical beneficiation method was employed to improve the RCA abrasion resistance to meet the Los Angeles abrasion (LAA) requirements for HMA aggregates. Then, the heavy-duty dense-graded HMA was mixed with beneficiated RCA (BRCA) (HMA-BRCA). The HMA mixture with NA (HMA-NA) was utilized as a benchmark. A series of laboratory performance tests on the Marshall stability and flow, resilient modulus (MR), dynamic modulus, and tensile strength ratio (TSR) was performed in conjunction with x-ray diffraction (XRD) analysis. Test results revealed that HMA-BRCA demonstrated better Marshall stability and flow and had a better MR than HMA-NA. However, HMA-BRCA and HMA-NA demonstrated almost identical dynamic modulus characteristics. Nevertheless, HMA-BRCA was more susceptible to moisture than HMA-NA, as indicated by the substandard TSR of HMA-BRCA. Further analysis showed that the breakage of BRCA particles during the mixing and compaction processes led to tighter packing of the HMA aggregate matrix, which was the cause for the improved strength, modulus, and deformation characteristics of HMA-BRCA. Furthermore, a relatively thinner asphalt binder film and the presence of calcite (retained from the original mortar) lead to the poor moisture damage resistance of HMA-BRCA. Therefore, moisture susceptibility is an issue when RCA is used in an HMA mixture, even though the RCA was treated to meet all HMA aggregate requirements. A solution by using an antistriping agent would be carefully considered.
AB - Construction and demolition (C&D) waste has been annually generated in high volume due to a mega-scale of the construction industry. It causes the environmental problem of waste management requiring numerous landfill disposal areas. C&D waste can be mainly used as recycled concrete aggregate. However, C&D materials are needed for more effective utilization. Applications in road pavement are recommended to overcome this problem. Therefore, this study examined the use of recycled concrete aggregate (RCA) as a full replacement for natural aggregate (NA) in a hot mix asphalt (HMA) mixture for a heavy-duty asphalt surface. A modified thermal-mechanical beneficiation method was employed to improve the RCA abrasion resistance to meet the Los Angeles abrasion (LAA) requirements for HMA aggregates. Then, the heavy-duty dense-graded HMA was mixed with beneficiated RCA (BRCA) (HMA-BRCA). The HMA mixture with NA (HMA-NA) was utilized as a benchmark. A series of laboratory performance tests on the Marshall stability and flow, resilient modulus (MR), dynamic modulus, and tensile strength ratio (TSR) was performed in conjunction with x-ray diffraction (XRD) analysis. Test results revealed that HMA-BRCA demonstrated better Marshall stability and flow and had a better MR than HMA-NA. However, HMA-BRCA and HMA-NA demonstrated almost identical dynamic modulus characteristics. Nevertheless, HMA-BRCA was more susceptible to moisture than HMA-NA, as indicated by the substandard TSR of HMA-BRCA. Further analysis showed that the breakage of BRCA particles during the mixing and compaction processes led to tighter packing of the HMA aggregate matrix, which was the cause for the improved strength, modulus, and deformation characteristics of HMA-BRCA. Furthermore, a relatively thinner asphalt binder film and the presence of calcite (retained from the original mortar) lead to the poor moisture damage resistance of HMA-BRCA. Therefore, moisture susceptibility is an issue when RCA is used in an HMA mixture, even though the RCA was treated to meet all HMA aggregate requirements. A solution by using an antistriping agent would be carefully considered.
KW - Beneficiation
KW - Hot mix asphalt (HMA)
KW - Recycled concrete aggregate (RCA)
KW - Utilization
UR - http://www.scopus.com/inward/record.url?scp=85105321775&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)MT.1943-5533.0003805
DO - 10.1061/(ASCE)MT.1943-5533.0003805
M3 - Journal article
AN - SCOPUS:85105321775
SN - 0899-1561
VL - 33
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
IS - 7
M1 - 04021156
ER -