A5055857230- Concrete and Cement Materials Research
- Innovative concrete reinforcement materials
- Concrete Properties and Behavior
- Powder Metallurgy Techniques and Materials
- Magnesium Oxide Properties and Applications
- Advanced materials and composites
- Rock Mechanics and Modeling
- Recycling and utilization of industrial and municipal waste in materials production
- Metal Alloys Wear and Properties
- Innovations in Concrete and Construction Materials
- Smart Materials for Construction
- Building materials and conservation
- CO2 Sequestration and Geologic Interactions
- Metallurgy and Material Forming
- Nuclear materials and radiation effects
- Advanced ceramic materials synthesis
- Concrete Corrosion and Durability
- X-ray Diffraction in Crystallography
- High-pressure geophysics and materials
- Microbial Applications in Construction Materials
- Grouting, Rheology, and Soil Mechanics
- Tunneling and Rock Mechanics
- Aluminum Alloys Composites Properties
- Corrosion Behavior and Inhibition
- Drilling and Well Engineering
Seoul National University
1999-2024
Weatherford College
2024
University of Delaware
2024
New Generation University College
2024
National University of Singapore
2016-2018
Stony Brook University
2013-2016
State University of New York
2013-2014
University of California, Berkeley
2010-2013
Samsung (South Korea)
2010
Nationwide Mutual Insurance Company (United States)
2009-2010
Ancient Roman syntheses of Al-tobermorite in a 2000-year-old concrete block submerged the Bay Pozzuoli (Baianus Sinus), near Naples, have unique aluminum-rich and silica-poor compositions relative to hydrothermal geological occurrences. In relict lime clasts, crystals calcium contents that are similar ideal tobermorite, 33 35 wt%, but low-silica contents, 39 40 reflect Al 3+ substitution for Si 4+ Q 2 (1Al), 3 (2 Al) tetrahedral chain branching sites. The has double silicate structure with...
The material characteristics and elastic properties of aluminum‐substituted 11 Å tobermorite in the relict lime clasts 2000‐year‐old Roman seawater harbor concrete are described with TG ‐ DSC 29 Si MAS NMR studies, along nanoscale tomography, X ‐ray microdiffraction, high‐pressure diffraction synchrotron radiation applications. crystals have aluminum substitution for silicon tetrahedral bridging branching sites 11.49(3) interlayer (002) spacing. With prolonged heating to 350°C, exhibit...
For optimum production of ultra-high performance concrete (UHPC), the material and microstructural properties UHPC cured under various heat treatment (HT) conditions are studied. The effects HT temperature duration on hydration reaction, microstructure, mechanical investigated. Increasing accelerates both cement pozzolanic but latter is more significantly affected. This accelerated reaction in clearly enhances compressive strength. However, strength after becomes stable as most finishes...
An ultra-thin and large-area skin-compatible heterogeneous organic/metal-oxide photosensor array is demonstrated which capable of sensing boosting signals with high detectivity signal-to-noise ratio. For the realization ultra-flexible high-sensitive arrays on a polyimide substrate having organic sensor metal-oxide circuitry, solution-processing room-temperature alternating photochemical conversion routes are applied. As service to our authors readers, this journal provides supporting...