A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Influence of particle size on particle breakage and shear strength of weak rockfill
Abstract Strong rockfill was originally thought to be best for the construction of dams and roads, but economic and environmental issues have increased the use of soft and weak rockfill in such projects. Much research has been done on the mechanical properties of strong rockfill materials, but little has been done on weak rockfill despite its increased use. Such materials have weak mechanical properties, including low strength, high compressibility, and material degradation over time. Limitations in the testing of large particles of rockfill in the lab make it necessary to consider appropriate scaling relations and expansion of the results for real infrastructures. The current study experimentally investigated the behavior of weak rockfill materials with a change in the maximum size of the particles. Water was added at specific moisture contents and the samples were tested using oedometer, direct shear, and Los Angeles tests. The results showed that an increase in the maximum particle size (MPS) of the weak rockfill increased particle breakage (PB) in all case studies, as has been observed in previous studies on strong rockfill material. Furthermore, an increase in moisture content resulted in an increase in PB. The internal friction angle was found to correlate directly with the MPS, but the ratio of vertical strain to PB was nearly constant and independent of MPS. These results have been used to determine a relation for PB in oedometer and direct shear tests and from the Los Angeles tests.
Influence of particle size on particle breakage and shear strength of weak rockfill
Abstract Strong rockfill was originally thought to be best for the construction of dams and roads, but economic and environmental issues have increased the use of soft and weak rockfill in such projects. Much research has been done on the mechanical properties of strong rockfill materials, but little has been done on weak rockfill despite its increased use. Such materials have weak mechanical properties, including low strength, high compressibility, and material degradation over time. Limitations in the testing of large particles of rockfill in the lab make it necessary to consider appropriate scaling relations and expansion of the results for real infrastructures. The current study experimentally investigated the behavior of weak rockfill materials with a change in the maximum size of the particles. Water was added at specific moisture contents and the samples were tested using oedometer, direct shear, and Los Angeles tests. The results showed that an increase in the maximum particle size (MPS) of the weak rockfill increased particle breakage (PB) in all case studies, as has been observed in previous studies on strong rockfill material. Furthermore, an increase in moisture content resulted in an increase in PB. The internal friction angle was found to correlate directly with the MPS, but the ratio of vertical strain to PB was nearly constant and independent of MPS. These results have been used to determine a relation for PB in oedometer and direct shear tests and from the Los Angeles tests.
Influence of particle size on particle breakage and shear strength of weak rockfill
Rahmani, Hamidreza (author) / Panah, Ali Komak (author)
2020
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Experimental Study of Rockfill Particle Breakage
| Trans Tech Publications | 2014
Influence of Particle Breakage on Critical State Line of Rockfill Material
| Online Contents | 2016
Elastoplastic Constitutive Model for Rockfill Materials Considering Particle Breakage
| Online Contents | 2017