TY - JOUR
T1 - Characterising the resilient behaviour of pavement subgrade with construction and demolition waste under Freeze–Thaw cycles
AU - Zhang, Junhui
AU - Zhang, Anshun
AU - Huang, Chao
AU - Yu, Huayang
AU - Zhou, Chao
N1 - Funding Information:
The authors gratefully acknowledge the financial support offered by the National Science Fund for Distinguished Young Scholars (52025085), National Natural Science Foundation of China (51927814, 51878078), Training Program for High-level Technical Personnel in Transportation Industry (2018?025), the Science and Technology Innovation Program of Hunan Province (2020RC4048), the design theory, method and demonstration of durability asphalt pavement based on heavy-duty traffic conditions in Shanghai area (CTKY-PTRC-2018-003), and the Open Fund of National Engineering Laboratory of Highway Maintenance Technology (kfj190106, Changsha University of Science & Technology). The authors thank the editor, the associate editor, and all anonymous reviewers for their insightful and constructive comments.
Funding Information:
The authors gratefully acknowledge the financial support offered by the National Science Fund for Distinguished Young Scholars ( 52025085 ), National Natural Science Foundation of China ( 51927814 , 51878078 ), Training Program for High-level Technical Personnel in Transportation Industry ( 2018–025 ), the Science and Technology Innovation Program of Hunan Province ( 2020RC4048 ), the design theory, method and demonstration of durability asphalt pavement based on heavy-duty traffic conditions in Shanghai area ( CTKY-PTRC-2018-003 ), and the Open Fund of National Engineering Laboratory of Highway Maintenance Technology ( kfj190106 , Changsha University of Science & Technology ). The authors thank the editor, the associate editor, and all anonymous reviewers for their insightful and constructive comments.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/6/1
Y1 - 2021/6/1
N2 - Recycling construction and demolition (C&D) waste as fillers in pavement subgrade is a sustainable paving technology with environmental and economic merits. The performance of pavement subgrade with C&D waste depends on its dynamic resilient modulus. Meanwhile, freeze–thaw cycles are also an important issue for engineering in seasonal frozen regions. However, research on characteristics of the dynamic resilient modulus of C&D waste, especially the properties under freeze–thaw cycles, is limited. To this end, this study aims to reveal the variation law of the dynamic resilient modulus of C&D waste under repeated freeze–thaw cycles and establish a reasonable performance prediction model. This study conducts a series of laboratory tests after various freeze–thaw cycles. Results indicate that the soil–water characteristic curves of C&D waste with different compactness and number of freeze–thaw cycles can be well described by Van Genuchten's model. Moreover, the dynamic resilient modulus enhances with the increase of matric suction, compactness, deviator stress and minimum bulk stress and exhibits a stress-hardening characteristic. Freeze–thaw cycles attenuate the matric suction and dynamic resilient modulus of C&D waste. Besides, high moisture contents, low stress levels and more freeze–thaw cycles all aggravate the attenuation of the dynamic resilient modulus in certain extent, but the attenuation is not sensitive to the compactness. Finally, this study establishes a high-accuracy prediction model of the dynamic resilient modulus considering the effect of repeated freeze–thaw cycles. This study can supply useful information on the application of C&D waste in pavement subgrade in seasonal frozen regions.
AB - Recycling construction and demolition (C&D) waste as fillers in pavement subgrade is a sustainable paving technology with environmental and economic merits. The performance of pavement subgrade with C&D waste depends on its dynamic resilient modulus. Meanwhile, freeze–thaw cycles are also an important issue for engineering in seasonal frozen regions. However, research on characteristics of the dynamic resilient modulus of C&D waste, especially the properties under freeze–thaw cycles, is limited. To this end, this study aims to reveal the variation law of the dynamic resilient modulus of C&D waste under repeated freeze–thaw cycles and establish a reasonable performance prediction model. This study conducts a series of laboratory tests after various freeze–thaw cycles. Results indicate that the soil–water characteristic curves of C&D waste with different compactness and number of freeze–thaw cycles can be well described by Van Genuchten's model. Moreover, the dynamic resilient modulus enhances with the increase of matric suction, compactness, deviator stress and minimum bulk stress and exhibits a stress-hardening characteristic. Freeze–thaw cycles attenuate the matric suction and dynamic resilient modulus of C&D waste. Besides, high moisture contents, low stress levels and more freeze–thaw cycles all aggravate the attenuation of the dynamic resilient modulus in certain extent, but the attenuation is not sensitive to the compactness. Finally, this study establishes a high-accuracy prediction model of the dynamic resilient modulus considering the effect of repeated freeze–thaw cycles. This study can supply useful information on the application of C&D waste in pavement subgrade in seasonal frozen regions.
KW - Construction and demolition waste
KW - Dynamic resilient modulus
KW - Freeze–thaw cycles
KW - Matric suction
KW - Prediction model
UR - http://www.scopus.com/inward/record.url?scp=85104074955&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2021.126702
DO - 10.1016/j.jclepro.2021.126702
M3 - Journal article
AN - SCOPUS:85104074955
SN - 0959-6526
VL - 300
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 126702
ER -
