Article
Engineering, Geological
Y. Heidarizadeh, S. H. Lajevardi, M. Sharifipour
Summary: This study investigates the dynamic properties of sandy soil mixtures with different cement contents and polypropylene fiber percentages. The results show that a mixture with 7% cement content and 0.4% polypropylene fiber reinforcement provides the best shear wave velocity and shear stiffness.
SOIL MECHANICS AND FOUNDATION ENGINEERING
(2022)
Article
Construction & Building Technology
Chunpeng Han, Yulong He, Jiayi Tian, Jian Zhang, Jianhua Li, Shaoquan Wang
Summary: Recent studies have shown that adding 0.3% polypropylene fibers with a length of 9 mm to soil can effectively enhance its shear strength. Analysis on factors such as fiber quantity, length, and dispersion coefficient has led to the proposal of effective fiber content and length for improving cohesion in fiber-reinforced clay.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Lan Cui, Wenzhao Cao, Qian Sheng, Mingxing Xie, Tao Yang, Ping Xiao
Summary: By experiment and simulation, the performance of layered geogrid-sand-clay reinforced structures was studied, showing that laying sand layers and embedding geogrids in sand layers can improve the mechanical properties of the structure and increase the shear strength index.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Geological
Ali Lashkari, Vahid Jamali
Summary: This study investigated the influence of overall particle shape, mean particle size, initial relative density, and effective normal stress on the soil-geosynthetic interaction through direct shear interface tests. Results showed that higher peak friction angles were mobilized with increases in initial relative density and angularity of sand particles, as well as a decrease in effective normal stress. Additionally, the slip at the interface was found to increase with the initial relative density of sand and regularity of particles, and decrease with increasing mean particle size and effective normal stress.
Article
Engineering, Geological
Mengtao Wu, Fangcheng Liu, Jun Yang
Summary: This paper focuses on the stress-strain-strength behavior of geogrid-reinforced rubber-sand mixture (RSM) and analyzes the effects of reinforcement layers, rubber contents, and confining pressures. The test results show that the strength parameters of the geogrid-reinforced RSM are significantly improved, with increasing reinforcement layers and decreasing confining pressure. The RSM with a 20% rubber content may be the optimum choice for reinforcement with geosynthetics. Additionally, a new equation is proposed to estimate the strength reinforcement effect of composite mixtures.
Article
Engineering, Geological
D. R. Manohar, P. Anbazhagan
Summary: The shear strength characteristics of geosynthetic-reinforced rubber-sand mixture (RSM) were investigated by analyzing the size effect of rubber, different rubber content proportions, types and layers of geosynthetics, and their arrangement. The reinforced RSM showed enhanced strength and energy absorption capacity, as well as decreased brittleness index values.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Engineering, Geological
Ji-Yun Chang, Shi-Jin Feng, Qi-Teng Zheng, Yang Shen
Summary: The dynamic shear mechanism of the composite liner system consisting of GMB and GCL is not clear due to limited dynamic test data. Results from cyclic shear tests suggest that the dynamic peak strength of the composite liner can generally be predicted with its static strength envelope. Proposed equations help accurately model the cyclic shear behavior, describing the dynamic softening mechanism and rate-dependent shear stiffnesses.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Engineering, Civil
Krishanu Mukherjee, Anil Kumar Mishra
Summary: The inclusion of glass fibre can reduce shrinkage cracks in sand-bentonite mixture but may have adverse effects on other parameters; addition of 1% glass fibre led to the maximum increase in the swelling index; hydraulic conductivity and consolidation rate slightly altered with glass fibre inclusion, resulting in increased peak and residual strength.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2021)
Article
Polymer Science
Yan Tan, Junyu Long, Wei Xiong, Xingxiang Chen, Ben Zhao
Summary: By adding polypropylene fibers, the frost resistance of natural sand and machine-made sand concrete can be greatly improved. The fiber content and fiber length have important effects on the frost resistance performance, and an appropriate fiber volume can significantly improve the strength and degree of freeze-thaw damage of the concrete.
Article
Engineering, Geological
Mingxing Xie, Junjie Zheng, Wenzhao Cao, Xiaoqiang Dong, Tao Yang, Lan Cui
Summary: The pullout behavior of a GSCLR structure was studied through discrete element method models, revealing that the ultimate pullout resistance does not continuously increase with the thickness of the sand layer, with an optimal thickness existing.
Article
Polymer Science
Joel Kennaway, Ali Rajabipour, Dongsheng Huang, Milad Bazli, Siyuan Tang, Junkai Wang, Hayden Zanker, Fangming Su
Summary: The confinement method can increase the shear strength and reduce the likelihood of shear failure in parallel strand bamboo connections by inducing compressive forces perpendicular to the composite fibers. It also improves the mechanical properties consistency throughout the loading process.
Article
Environmental Sciences
Amin Falamaki, Mahdi Salimi, Amir Hossein Vakili, Mehdi Homaee, Marzieh Aryanpour, Maryam Sabokbari, Reza Dehghani, Kourosh Masihzadeh, Amir Hossein Karimi
Summary: This study investigated the effect of leachate on the geotechnical parameters and cracking behavior of compacted clay liners (CCLs) with various percentages of polypropylene fibers. Laboratory tests were conducted on 200 compacted clay samples reinforced with different fiber contents and prepared with water or leachate. The presence of fibers reduced surface desiccation cracks in the clay liners, and increased cohesion and friction angle. The addition of fibers also enhanced shear strength and unconfined compressive strength in all samples, and increased ductile behavior. However, the existence of fibers led to higher permeability in the samples, especially in leachate-prepared samples containing 1% fibers.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Geological
Yang Xiao, Zengchun Sun, Ninghao Wang, Haotian Guo, Huanran Wu, Minqiang Meng
Summary: This study investigates the shear responses and thermal effects of binary mixtures of quartz sand and kaolin clay using temperature-controlled triaxial drained compression tests. The results demonstrate that confining pressure, fine content, and temperature considerably influence the thermo-mechanical properties of the mixtures.
Article
Construction & Building Technology
Pei Yan, Bing Chen, Sher Afgan, M. Aminul Haque, Meng Wu, Jiaxing Han
Summary: This study aimed to enhance the ductility characteristics of ultra-high performance concrete fibre material by utilizing different micro-synthetic fibres. The type and amount of added fibres were found to influence the properties of both fresh and hardened concretes, with glass fibre having a notable impact on the flowability of fresh concrete. Additionally, the compressive strength increased with the addition of fibre filament, while flexural strength and toughness indexes also improved accordingly.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Geological
W. X. Zeng, F. Y. Liu, X. X. Zhu, J. H. He, J. Wang
Summary: This study investigates the shear characteristics of 3D geogrid-sand interfaces using large-scale direct shear tests and the discrete element method. The results show that the mesh pattern and transverse-rib thickness have an impact on the interface shear characteristics.
GEOSYNTHETICS INTERNATIONAL
(2022)
Article
Mechanics
A. M. Amaro, M. I. M. Pinto, P. N. B. Reis, M. A. Neto, S. M. R. Lopes
COMPOSITE STRUCTURES
(2018)
Editorial Material
Engineering, Geological
I. M. C. F. G. Falorca, M. I. M. Pinto
GEOSYNTHETICS INTERNATIONAL
(2010)
Article
Engineering, Geological
I. M. C. F. G. Falorca, L. M. F. Gomes, M. I. M. Pinto
GEOSYNTHETICS INTERNATIONAL
(2011)
Article
Engineering, Geological
A. A. S. Correia, M. I. M. Pinto, M. L. C. Lopes
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2012)
Article
Engineering, Geological
A. A. S. Correia, M. I. M. Pinto, M. L. Lopes
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2011)
Article
Chemistry, Multidisciplinary
Adelino V. Lopes, Sergio M. R. Lopes, Isabel Pinto
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Multidisciplinary
Adelino Lopes, Sergio M. R. Lopes, Isabel Pinto
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Geological
Antonio Alberto S. Correia, Maria Isabel Moita Pinto, Katia D. T. Monteiro
Summary: This paper presents an accurate prediction method for the deformation of retaining walls reinforced with geosynthetics using laboratory-scale physical models. The proposed method is shown to provide reliable results when compared with physical measurements.
INTERNATIONAL JOURNAL OF PHYSICAL MODELLING IN GEOTECHNICS
(2022)
Article
Engineering, Mechanical
Hugo Canilho, Cesar Santos, Catia Taborda, Isabel Falorca, Cristina Fael
Summary: This study presents a method for measuring dispersion coefficients of ash particles in watercourses and establishes the relationship between suspended ash concentration and the signal-to-noise ratio of an acoustic backscattering system. The results suggest that a single-frequency acoustic technique may be used for detecting suspended ashes, but errors may occur at higher concentrations.
FLOW MEASUREMENT AND INSTRUMENTATION
(2022)
Article
Green & Sustainable Science & Technology
Dina Pereira, Joao Carlos Correia Leitao, Pedro Dinis Gaspar, Cristina Fael, Isabel Falorca, Wael Khairy, Nadya Wahid, Hicham El Yousfi, Bassou Bouazzama, Jan Siering, Harald Hansmann, Jelena Zascerinska, Sarah Camilleri, Francesca Busuttil, Malcolm Borg, Joseph Mizzi, Reno Micallef, Joseph Cutajar
Summary: Water security is a global concern, especially in the Mediterranean region. This study examines irrigation and water supply technologies for smallholder farmers in Egypt, Malta, Morocco, and Portugal. The research methods include literature review, fieldwork, and observation. The findings highlight the importance of considering regional characteristics when selecting irrigation and water supply technologies.
Proceedings Paper
Engineering, Mechanical
Ana M. Amaro, M. Isabel M. Pinto, Sergio Lopes, Paulo N. B. Reis, Jose M. O. S. Cirne
IRF2016: 5TH INTERNATIONAL CONFERENCE INTEGRITY-RELIABILITY-FAILURE
(2016)
Proceedings Paper
Engineering, Geological
Ana Cristina Freire, Isabel M. Martins, Claudia Ferreira, Jorge Goncalves, Antonio Jose Roque, Isabel Pinto
ADVANCES IN TRANSPORTATION GEOTECHNICS III
(2016)
