A5064237040- Concrete Corrosion and Durability
- Innovations in Concrete and Construction Materials
- Concrete and Cement Materials Research
- Concrete Properties and Behavior
- Geotechnical Engineering and Underground Structures
- Innovative concrete reinforcement materials
- Geotechnical Engineering and Soil Stabilization
- Nanotechnology research and applications
- Rock Mechanics and Modeling
- Advanced ceramic materials synthesis
- Additive Manufacturing and 3D Printing Technologies
- Engineering Applied Research
- Mechanical stress and fatigue analysis
- Numerical methods in engineering
- Teaching and Learning Programming
- Microbial Applications in Construction Materials
- Hydraulic Fracturing and Reservoir Analysis
- Fluid Dynamics Simulations and Interactions
- Oil and Gas Production Techniques
- Natural Fiber Reinforced Composites
- Educational Games and Gamification
- Composite Material Mechanics
- Environmental Engineering and Cultural Studies
- Structural Engineering and Vibration Analysis
- Thermal properties of materials
Sandia National Laboratories
2022-2023
Sandia National Laboratories California
2022
University of New Mexico
2021
Rensselaer Polytechnic Institute
2015-2020
ORCID
2019-2020
Washington State University
2011
The macroscopic continuum creep simulation always neglect internal creep/relaxation at lower scales due to the self-equilibrated stresses. So far, a comprehensive model for concrete meso-scale level has been lacking. In this paper, such shortcoming is over come by explicit implementation of solidification-microprestress (SM) theory within Lattice Discrete Particle Model (LDPM). Aging effect obtained using global reaction degree multi physics evolving temperature, humidity and cement in full...
Polymer concrete (PC) has been used to replace cement when harsh service conditions exist. Polymers have a high carbon footprint considering their life cycle analysis, and with increased climate change concerns the need reduce greenhouse gas emission, bio-based polymers could be as sustainable alternative binder produce PC. This paper examines development characterization of novel bio-polymer (BPC) using polyurethane in lieu cement, modified benzoic acid carboxyl-functionalized multi-walled...
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Time-dependent deformations, including creep and shrinkage, are essential factors that govern multiple design aspects of prestressed/post-tensioned concrete structures. These include (but not limited to) time to initial post-tensioning, prestressing losses, shoring removal, serviceability in general. Excessive shrinkage deformations can render a structure unusable aesthetically or even lead eventual collapse. This is becoming more important because many the recently developed advanced...
Concrete is a complex heterogeneous material. Its internal structure controls its mechanical behavior through crack localization, branching, and coalescence. As result, only models that represent failure fracture-mechanics-based formulations can physically account for such phenomena. Among these models, the lattice-discrete particle model (LDPM) has great success. By representing concrete an assemblage of interacting coarse aggregate pieces, LDPM successfully multiaxial under various static...
One of the main challenges using a high fiber volume content in cement composite is narrow margin beyond which fibers can cause an adverse effect on mechanical properties. In this paper, significance size distribution and different proportions chopped milled carbon microfibers are investigated. The mixes’ flowability showed improvement with altering despite having content. Uniaxial compression cylinders unnotched notched beams were cast then tested at 7 28 days age. It was found that...
Corrosion of rebars in concrete is a major source deterioration structures exposed to extreme environmental conditions.It one the main life time limit states for many infrastructures.In addition well understood effect section capacity reduction due steel cross section, loss bond between and enables larger deformations that are not easily nor expected.To understand problem, series accelerated corrosion experiments were conducted.Different cylinder sizes cast with #3 placed middle cylinders...
Abstract Using a belt as replacement for rope on rotary Power Take-Offs (PTOs) system has become more common Wave Energy Converters (WECs), improving Cyclic Bend Over Sheave (CBOS) performance with smaller bending thickness belts. However, the service life predictions of PTOs is major concern in design, because under harsh underwater environments largely less studied. In this work, effect fleet and twist angles wear being investigated both experimentally numerically. Two Three-dimensional...
Corrosion of corrugated metal pipes (CMP) is a significant problem facing all U.S. Departments Transportations. There an urgent need to provide efficient solution, that corrosion-resistant, retrofit thousands corroded CMP across the country. High specific strength, high strength-to-weight ratio, and corrosion resistance made fiber-reinforced polymers (FRP) engineer's choice material where problem. This paper discusses design method for using glass polymer (GFRP) slip liner culvert. The...
It is very common to consider the cross girder of a slab-girder bridge as stiff-Rigid-girder rested on springs while distributing loads main girders for simplification. This approach gives suitable results primary manual analysis bridges that have depth almost equal depth, small spacing between girders, large spans vent, and monolithically casted elements. Two simplified models were studied in this paper: an infinitely rigid beam having applied concentrated load, imaginary flexible same...
Automation is changing the definition and allocation of jobs in most engineering fields including civil engineering. This digital disruption environmental (CEE) could potentially result extinction traditional role structural engineers. In response, educators must strive to provide students with an evolving skill set, nurturing their creativity judgment. Students will have design resilient sustainable solutions for built environment a dynamic, virtually connected setting where clients,...