329 documents found, page 1 of 33
Dissipation boundaries for bender element experiments on geomaterials based on ...
Moldovan, Ionuţ Dragoş; Roshan, Mohammad Jawed; Azenha, Miguel; Correia, A. GomesThe bender element (BE) test is widely employed in geotechnical engineering for measuring the shear wave velocity (V<inf>s</inf>) and, consequently, the small-strain shear modulus (G<inf>0</inf>), due to its ease of application, integration into geotechnical devices, and effectiveness in real-world projects. However, signal distortion, primarily caused by shear and compression wave interference, remains a signi...
Revealing the nature of soil liquefaction using machine learning
Ghani, Sufyan; Thapa, Ishwor; Kumari, Sunita; Correia, A. Gomes; Asteris, Panagiotis G.This study highlights the importance of consistently assessing soil and subsoil liquefaction susceptibility in construction projects through comprehensive evaluation and regular site investigations. Despite the abundance of geotechnical reports, many remain underutilized post-project completion, while the literature contains numerous site-specific case studies. To address this gap, this study suggests integrati...
Multifunctional cementitious composites from fabrication to their application i...
Roshan, Mohammad Jawed; Correia, A. GomesMultifunctional cementitious composites have been widely recommended for transportation infrastructure due to their versatile applications. These advanced materials can serve multiple functions, including structural health monitoring (SHM), traffic management, de-icing and snow melting, cathodic protection, grounding, energy harvesting, and shielding against electromagnetic interference (EMI). Given their effec...
Self-sensing cementitious composites for structural health monitoring: recent a...
Roshan, Mohammad Jawed; Correia, A. Gomes; Fangueiro, Raúl; Mendes, P. M.Structural health monitoring (SHM) (early detection of degradation, cracks, and damage) of civil engineering infrastructures plays a vital role in extending their service lifespans and decreasing maintenance costs. Thus, self-sensing cementitious composites have attracted significant attention in recent years. However, application of self-sensing cementitious composites in SHM still faces several challenges. Th...
A multifunctional cementitious composite for pavement subgrade
Roshan, Mohammad Jawed; Abedi, Mohammadmahdi; Correia, A. Gomes; Fangueiro, Raúl; Mendes, P. M.Premature failure and degradation of layers are the main problems for transportation infrastructure. Addressing these issues necessitates implementing structural health monitoring (SHM) for pavement construction layers. To this end, this research investigated the stress/strain and damage detection capabilities of a self-sensing cementitious composite developed for potential utilization in the construction of an...
Performance of self-sensing cement-stabilized sand under various loading condit...
Roshan, Mohammad Jawed; Abedi, Mohammadmahdi; Correia, A. Gomes; Fangueiro, RaúlNumerous elements, such as the composition and characteristics of carbon nanomaterials, the composition and characteristics of the matrix material, moisture levels, temperature, and loading circumstances, influence the piezoresistive behavior of self-sensing cementitious composites. While some past research has explored the impact of some of these factors on the performance of self-sensing cementitious composit...
A modified Rowe cell with bender elements for small strain shear modulus measur...
Almukashfi, Abdalla Mustafa Abdalla; Castellanza, Ricardo; Correia, A. Gomes; Arroyo, Marcos; Zuretti, Carlo; Bendea, Daniela; Moldovan, Ionut DragosThe small strain shear modulus (G0) is an important characteristic of geomaterials. Its laboratory measurements are very frequently based on bender element transducers installed in different geotechnical apparatuses. Despite their widespread use, there is room to improve the precision, reproducibility, and robustness of bender element measurements, which are currently hampered by an oversimplified interpretatio...
A computational platform for automatic signal processing for bender element sen...
Moldovan, Ionuţ Dragoş; Almukashfi, Abdalla; Correia, A. GomesThe small strain shear modulus is an important characteristic of geomaterials that can be measured experimentally using piezoelectric sensors (bender elements). However, most conventional signal interpretation techniques are based on the visual observation of the output signal and therefore inherently subjective. Objective techniques also exist, like the cross-correlation of the input and output signals, but th...
A modified rowe cell with bender elements for small strain shear modulus measur...
Almukashfi, Abdalla Mustafa Abdalla; Castellanza, Ricardo; Correia, A. Gomes; Arroyo, Marcos; Zuretti, Carlo; Bendea, Daniela; Moldovan, Ionut DragosThe small strain shear modulus (G0) is an important characteristic of geomaterials. Its laboratory measurements are very frequently based on bender element transducers installed in different geotechnical apparatuses. Despite their widespread use, there is room to improve the precision, reproducibility, and robustness of bender element measurements, which are currently hampered by an oversimplified interpretatio...
The pioneer of intelligent and sustainable construction in tunnel shotcrete app...
Abedi, Mohammadmahdi; Gulisano, Federico; Han, Baoguo; Fangueiro, Raúl; Correia, A. GomesIn this study, a self-sensing and self-heating natural fibre-reinforced cementitious composite for the shotcrete technique was developed using Kenaf fibres. For this purpose, a series of Kenaf fibre concentrations were subjected to initial chemical treatment, followed by integration into the cement-based composite containing hybrid carbon nanotubes (CNT) and graphene nanoplatelets (GNP). The investigation encom...