A5065373526- Concrete and Cement Materials Research
- Concrete Properties and Behavior
- Mechanical Behavior of Composites
- Structural Behavior of Reinforced Concrete
- Innovative concrete reinforcement materials
- Advanced ceramic materials synthesis
- Recycled Aggregate Concrete Performance
- Fiber-reinforced polymer composites
- Carbon Nanotubes in Composites
- Polymer Nanocomposites and Properties
- Heat Transfer and Optimization
- Gas Sensing Nanomaterials and Sensors
- Pelvic and Acetabular Injuries
- Conducting polymers and applications
- Tunneling and Rock Mechanics
- Advanced Multi-Objective Optimization Algorithms
- Advanced Fiber Optic Sensors
- Ultrasonics and Acoustic Wave Propagation
- Advanced Sensor and Energy Harvesting Materials
- Recycling and utilization of industrial and municipal waste in materials production
- Advanced materials and composites
- Pelvic floor disorders treatments
- Surface Modification and Superhydrophobicity
- Luminescence Properties of Advanced Materials
- Polymer composites and self-healing
North Carolina State University
2019-2023
University of New Mexico
2013-2017
Self-compacting concrete (SCC) mixtures include high powder content (i.e.450-600 kg/m 3 ) which is needed to maintain sufficient stability/cohesion of the mixture and hence improving segregation resistance.The use cement meet need not desirable as it will increase cost has other negative effects on properties.The requirement for in SCC usually met by using mineral admixtures such slag, fly ash and/or less reactive filler materials limestone granite powder.Ceramic waste (CWP) produced during...
Abstract Vertically aligned carbon nanotube (VACNT) array growth is an established process where high aspect ratio nanotubes (CNTs) are produced. This work demonstrates one‐step approach to fabricate bulk polymer nanocomposites using CNT fragments'. Here, 4.5 mm long CNTs were collected post VACNTs synthesis. Next, fragments coated with pyrolytic (PyC) and infused polydimethylsiloxane (PDMS) matrix create porous CNT/PDMS nanocomposite a weight fraction of 20%. Achieving similar super bundled...
Previous studies demonstrated coupling of acoustic guided waves from one optical fiber to another through a simple adhesive bond coupler. This paper experimentally utilizes such an coupler easily extend already existing sensor network. We demonstrate this concept for detecting simulated cracks growing circular holes in thin aluminum plate. A single, remotely bonded FBG is used detect the original crack growth, followed by addition other segments using couplers new growth locations on laser...
Calcium Silicate Hydrate gel (C-S-H) is the basic product of cement hydration process responsible for strength and durability concrete. Synthetic C-S-H was synthesized by mixing oxide (CaO denoted as C) silicate (SiO2 S) with a C/S mixture ratio 1.5. powder filtered, dried to relative humidity 11% then compacted at 400 MPa. Nanoindentation tests incorporating time-dependent effect (creep) were performed on polished specimens using Berkovich indenter tip. The reduced elastic modulus creep...
Calcium Silicate Hydrate gel (C-S-H) is the main product of cement hydration process responsible for strength and durability concrete. While C-S-H can be obtained from Portland hydration, hydrating produces other by-products such that make it difficult to characterize solely. synthesized here by mixing calcium oxide (CaO) with fumed silica (SiO2) a large amount deionized water (H2O), making slurry. Two Cao/SiO2 mixture ratios 1.5 0.7 were examined. The slurry was filtered remove excess 24...
Type-G cement slurry with various admixtures commonly used in oil/gas well cementing (OWC) incorporating 1, 2 and 3% nanoclay particles by weight of were produced.A water/cement ratio 0.44 was the mixes subjected to a temperature 290° F pressure 4666 psi for 48 hours.First, effect on compressive strength evolution investigated.Second elastic viscoelastic characteristics cementitious characterized using nanoindentation.The nanoindentation tests enabled evaluating maximum indentation depth,...
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