A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigation on the effects of physical property and stress state of graded crushed stone on resilient modulus and permanent deformation
Graphical abstract Display Omitted
Highlights Stress-dependence is more significant for the fine gradation. Resilient modulus decreases and deformation increases with water content. Increasing confining stress contributes to the resilient modulus for fine gradation. Critical stress ratio should be considered in the design of graded crushed stone.
Abstract The graded crushed stone has been widely used in flexible pavement structures to reduce the reflective crack and optimize pavement performance. The most important performance indexes are the mechanical property characterized by resilient modulus and permanent deformation. This paper is aimed to study the effects of the physical property and stress state on the performance of graded crushed stone to provide the basis of the pavement design. The results show that: the fine gradation has a higher increasing magnitude as the bulk stress increases, indicating a more significant stress dependence, while the coarse and middle gradations have a similar changing trend. The increase in water content could reduce the resilient modulus and enhance permanent deformation due to the lubricating effect. The deviatoric stress has a prominent effect on the resilient modulus for coarse gradation, while the confining stress is for fine gradation. Then the permanent deformation is significantly affected by the stress ratio, in which accumulated permanent strain and deformation rate all increase with the increasing of stress ratio. The critical stress ratio should be determined to control the stress state of graded crushed stone to a limited range to prevent unstable failure.
Investigation on the effects of physical property and stress state of graded crushed stone on resilient modulus and permanent deformation
Graphical abstract Display Omitted
Highlights Stress-dependence is more significant for the fine gradation. Resilient modulus decreases and deformation increases with water content. Increasing confining stress contributes to the resilient modulus for fine gradation. Critical stress ratio should be considered in the design of graded crushed stone.
Abstract The graded crushed stone has been widely used in flexible pavement structures to reduce the reflective crack and optimize pavement performance. The most important performance indexes are the mechanical property characterized by resilient modulus and permanent deformation. This paper is aimed to study the effects of the physical property and stress state on the performance of graded crushed stone to provide the basis of the pavement design. The results show that: the fine gradation has a higher increasing magnitude as the bulk stress increases, indicating a more significant stress dependence, while the coarse and middle gradations have a similar changing trend. The increase in water content could reduce the resilient modulus and enhance permanent deformation due to the lubricating effect. The deviatoric stress has a prominent effect on the resilient modulus for coarse gradation, while the confining stress is for fine gradation. Then the permanent deformation is significantly affected by the stress ratio, in which accumulated permanent strain and deformation rate all increase with the increasing of stress ratio. The critical stress ratio should be determined to control the stress state of graded crushed stone to a limited range to prevent unstable failure.
Investigation on the effects of physical property and stress state of graded crushed stone on resilient modulus and permanent deformation
Luan, Yingcheng (author) / Ma, Yuan (author) / Ma, Tao (author) / Xia, Fei (author)
2023-07-26
Article (Journal)
Electronic Resource
English
A Repeated Loading Triaxial Test Study on Resilient Modulus of Graded Crushed Stone
| Tema Archive | 2012
Dependence of the Deformation Modulus of Soil-Crushed-Stone Layer from the Content of Crushed Stone
| Springer Verlag | 2020