A5067889024- Concrete and Cement Materials Research
- Building materials and conservation
- Drilling and Well Engineering
- Masonry and Concrete Structural Analysis
- Metal and Thin Film Mechanics
- Concrete Properties and Behavior
- Grouting, Rheology, and Soil Mechanics
- Rock Mechanics and Modeling
- Magnesium Oxide Properties and Applications
- Concrete Corrosion and Durability
- Hydraulic Fracturing and Reservoir Analysis
- Advanced Surface Polishing Techniques
- Recycling and utilization of industrial and municipal waste in materials production
- Historical Studies of Medieval Iberia
- Diamond and Carbon-based Materials Research
- Ultrasonics and Acoustic Wave Propagation
- Aerogels and thermal insulation
- Carbon and Quantum Dots Applications
- Heavy Metal Exposure and Toxicity
- Corrosion Behavior and Inhibition
- Material Dynamics and Properties
- Nanotechnology research and applications
- Thermal properties of materials
- Integrated Circuits and Semiconductor Failure Analysis
- Building Energy and Comfort Optimization
University of Houston
2017-2023
Massachusetts Institute of Technology
2012-2022
ORCID
2021
University of Minho
2006-2011
Despite its ubiquitous presence in the built environment, concrete's molecular-level properties are only recently being explored using experimental and simulation studies. Increasing societal concerns about environmental footprint have provided strong motivation to develop new concrete with greater specific stiffness or strength (for structures less material). Herein, a combinatorial approach is described optimize of cement hydrates. The method entails screening computationally generated...
Significance Calcium–silicate–hydrate (C–S–H) nanoscale gels are the main binding agent in cement and concrete, crucial for strength long-term evolution of material. Even more than molecular structure, C–S–H mesoscale amorphous texture over hundreds nanometers plays a role material properties. We use statistical physics framework aggregating nanoparticles numerical simulations to obtain first, our knowledge, quantitative model such complex The extensive comparison with experiments ranging...
Selenium in water is becoming of increasing risk to human exposure because only recently serious health effects have been associated with their presence resources. The present study investigated the development and optimization composition graphene oxide polymeric nanocomposite hydrogel beads by using response surface methodology. use polymers such as chitosan polyethylenimine, which are rich amine alcoholic functional groups, provided enhanced removal anionic selenium species from water....
Despite the omnipresence of clay brick as construction material since thousands years, fundamental knowledge about link between composition, microstructure, and mechanical performance is still scarce. In this paper, we use a variety advanced techniques experimental mechanics characterization for extruded masonry, that range from scanning electron microscopy (SEM) coupled with energy‐dispersive X‐ray spectroscopy, mercury intrusion porosimetry, to instrumented nanoindentation macroscopic...
From soft polymeric gels to hardened cement paste, amorphous solids under constant load exhibit a pronounced time-dependent deformation called creep. The microscopic mechanism of such phenomenon is poorly understood in materials and constitutes an even greater challenge densely packed chemically reactive granular systems. Both features are prominently present hydrating pastes composed calcium silicate hydrate (C-S-H) nanoparticles, whose packing density increases as function time, while...
Abstract With the search for hydrocarbons moving to more extreme environments, includingdeepwater, one of challenges associated with cementing is ensuring thelong-term integrity and mechanical properties cement at hightemperatures (HT). To avoid strength retrogression temperatures above about 110°C, silicais added cement. This makes hydration process (setting curing ofthe cement) complex, as initially formed products are replacedby stable phases over time. study nanostructure...
Comparison of thermal conductivity in hybrid and pristine inorganic models the modal spectrum each sample showing approximately unchanged number propagating modes a significant added localized sample.