Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework
Construction and Demolition Wastes (CDW) serves as an effective filler for highway subgrades, demonstrating commendable performance characteristics. The efficient utilization of CDW not only contributes to environmental sustainability but also yields significant economic benefits. This study employs...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
|
| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525006023 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850151511485579264 |
|---|---|
| author | Hao Yang Fujie Zhao Junhui Zhang Ke Liu |
| author_facet | Hao Yang Fujie Zhao Junhui Zhang Ke Liu |
| author_sort | Hao Yang |
| collection | DOAJ |
| description | Construction and Demolition Wastes (CDW) serves as an effective filler for highway subgrades, demonstrating commendable performance characteristics. The efficient utilization of CDW not only contributes to environmental sustainability but also yields significant economic benefits. This study employs discrete element simulation to develop a triaxial sample model comprising particles with four distinct levels of sphericity. By varying the combinations of sphericity, brick-concrete ratio, and void ratio, triaxial simulation tests are conducted, and the critical state soil mechanics framework is applied to fit the critical state line (CSL) of the samples. The results indicate that sphericity, brick-concrete ratio, and void ratio substantially influence the macroscopic mechanical properties of CDW. Notably, as sphericity increases, the peak deviatoric stress of the samples decreases, and significant volume deformation occurs. The slope of the CSL in the q-p′ plane diminishes, while the slopes of both forms of the CSL in the e-log p′ plane increase. Furthermore, a decrease in the brick-concrete ratio enhances the anti-deformation and compressive capacities of the samples. As the brick-concrete ratio decreases, both the slopes and intercepts of the CSL in the e-log p′ plane exhibit an upward trend. Conversely, an increase in the void ratio leads to a reduction in the overall strength and anti-deformation capacity of the specimens, an increase in the compressibility of the specimen volume, an elevation of the CSL slope on the q-p′ plane, and a gradual increase in both the slope and intercept of the semi-logarithmic form of the CSL on the e-log p′ plane, as well as a gradual increase in the slope of the power-law form of the CSL. |
| format | Article |
| id | doaj-art-d1ec5db1189240609e6bbcbe7f00f254 |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-d1ec5db1189240609e6bbcbe7f00f2542025-08-20T02:26:14ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0480410.1016/j.cscm.2025.e04804Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics frameworkHao Yang0Fujie Zhao1Junhui Zhang2Ke Liu3Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science & Technology, Changsha, Hunan 410114, China; School of Transportation, Changsha University of Science & Technology, Changsha 410114, ChinaKey Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science & Technology, Changsha, Hunan 410114, China; School of Transportation, Changsha University of Science & Technology, Changsha 410114, ChinaKey Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science & Technology, Changsha, Hunan 410114, China; School of Transportation, Changsha University of Science & Technology, Changsha 410114, China; Corresponding author at: Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science & Technology, Changsha, Hunan 410114, China.Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science & Technology, Changsha, Hunan 410114, China; School of Transportation, Changsha University of Science & Technology, Changsha 410114, ChinaConstruction and Demolition Wastes (CDW) serves as an effective filler for highway subgrades, demonstrating commendable performance characteristics. The efficient utilization of CDW not only contributes to environmental sustainability but also yields significant economic benefits. This study employs discrete element simulation to develop a triaxial sample model comprising particles with four distinct levels of sphericity. By varying the combinations of sphericity, brick-concrete ratio, and void ratio, triaxial simulation tests are conducted, and the critical state soil mechanics framework is applied to fit the critical state line (CSL) of the samples. The results indicate that sphericity, brick-concrete ratio, and void ratio substantially influence the macroscopic mechanical properties of CDW. Notably, as sphericity increases, the peak deviatoric stress of the samples decreases, and significant volume deformation occurs. The slope of the CSL in the q-p′ plane diminishes, while the slopes of both forms of the CSL in the e-log p′ plane increase. Furthermore, a decrease in the brick-concrete ratio enhances the anti-deformation and compressive capacities of the samples. As the brick-concrete ratio decreases, both the slopes and intercepts of the CSL in the e-log p′ plane exhibit an upward trend. Conversely, an increase in the void ratio leads to a reduction in the overall strength and anti-deformation capacity of the specimens, an increase in the compressibility of the specimen volume, an elevation of the CSL slope on the q-p′ plane, and a gradual increase in both the slope and intercept of the semi-logarithmic form of the CSL on the e-log p′ plane, as well as a gradual increase in the slope of the power-law form of the CSL.http://www.sciencedirect.com/science/article/pii/S2214509525006023Construction and Demolition WastesDiscrete Element MethodCritical StateMechanical Properties |
| spellingShingle | Hao Yang Fujie Zhao Junhui Zhang Ke Liu Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework Case Studies in Construction Materials Construction and Demolition Wastes Discrete Element Method Critical State Mechanical Properties |
| title | Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework |
| title_full | Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework |
| title_fullStr | Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework |
| title_full_unstemmed | Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework |
| title_short | Numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework |
| title_sort | numerical discrete element method investigation on mechanical properties of construction and demolition wastes within the critical state soil mechanics framework |
| topic | Construction and Demolition Wastes Discrete Element Method Critical State Mechanical Properties |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525006023 |
| work_keys_str_mv | AT haoyang numericaldiscreteelementmethodinvestigationonmechanicalpropertiesofconstructionanddemolitionwasteswithinthecriticalstatesoilmechanicsframework AT fujiezhao numericaldiscreteelementmethodinvestigationonmechanicalpropertiesofconstructionanddemolitionwasteswithinthecriticalstatesoilmechanicsframework AT junhuizhang numericaldiscreteelementmethodinvestigationonmechanicalpropertiesofconstructionanddemolitionwasteswithinthecriticalstatesoilmechanicsframework AT keliu numericaldiscreteelementmethodinvestigationonmechanicalpropertiesofconstructionanddemolitionwasteswithinthecriticalstatesoilmechanicsframework |