Rotana Hay Email & Phone Number

San Jose, California, United States

Richmond, California, United States

Abu Dhabi, United Arab Emirates

• Resolved evolution of phases, micromechanical properties and morphology of calcium (alumino)silicate hydrates C-(A-)S-H under carbonation
• Investigated nucleation pathways and phase quantification of binders under carbonation
• Characterized and enhanced the properties and absorption of CO2-squesteration construction materials with nucleation agents
• Unraveled the physico-chemical and mechanical properties of limestone calcined clay cement (LC3) at varying sulfation levels
• Evaluated the corrosion resistance of LC3 under the combined action of carbonation and chloride exposure
• Developed high-performance deflection-hardening concrete composites using LC3

• Investigated the morphology and nano-mechanical properties of calcium alumino silicate hydrates or C-(A-)S-H, and influencing parameters on nanoindentation of C-(A-)S-H
• Studied the effects of supplementary cementitious materials on passive film properties
• Formulated and characterized the properties of sustainable cement alternatives (reactive MgO cement, and limestone calcined clay-LC3),
• Investigated the effects of curing duration and temperature on chemo-mechanical properties of reactive MgO-based cement
• Performed durability studies on corrosion and alkali-silica reaction resistance of reactive MgO cement
• Conducted a feasibility study for a scale-up of accelerated carbonation of MgO-based cement, chloride binding and possible use of seawater in concrete, 3D printing of ultra-light weight concrete composite (ULWCC), and.

Phnom Penh, Cambodia

• Developed teaching materials and conducted lectures on Steel Design & Reinforced Concrete Structures
• Supervised students on 4 successful Final Year Projects

Phnom Penh, Cambodia

• Led research & development of new concrete types including low-heat, lightweight, expansive, pervious, slipform & high strength concrete
• Performed monthly data analysis & mix optimization to cut down materials cost and minimize failure
• Provided monthly training and conducted evaluation to develop capacity of Quality Control, laboratory team and all other technical teams
• Strengthened relationship and cooperation between company, clients and universities through technical sharing sessions and site visits
• Managed IOS 9001-2015 certification process and its implementation
• Developed a set of good practice guidelines for the construction industry

Phnom Penh, Cambodia

• Designed concrete mixes to meet client specifications
• Implemented quality management throughout the production process
• Managed laboratory testing and reporting
• Provided training to technical and sales teams
• Responded to site issues, developed new concrete composites

Phnom Penh, Cambodia

• Developed & provided course on Construction Materials
• Supervised students on Final Year design projects

Berkeley, California

• Examined short and long-term alkali silica reaction (ASR) mitigation mechanisms of fly ash
• Investigated the confinement effects of hybrid fibers on ASR mitigation
• Investigated the possibilities of using waste metals in preventing ASR in concrete
• Developed translucent concrete wall panels with HPFRC
• Investigated the role of crack and interfacial disturbance on corrosion of steel rebar in concrete
• Verified acidification at steel-concrete interface under accelerated corrosion of steel rebar in concrete

Berkeley, CA, USA

• Developed green high-performance hybrid fiber-reinforced concrete with industrial waste integration, applying it for energy-efficient buildings, and performing life cycle assessment of the system
• Studied the effects of fibers, slag and concrete-steel interface properties on corrosion of steel in concrete under accelerated corrosion test
• Studied the effects and mechanisms of fibers and fly ash on alkali-silica reactions
• Applied the composite in an innovative double skin façade (DSF) system for operational energy reduction in buildings and conducting life cycle assessment of the system.

• Attended to questions from architects and quantity surveyors
• Attended to authority's queries for structural submission approvals
• Designed and checked household shelters to meet authority specifications
• Proposed structural schemes and designed precast high-rise public housing buildings
• Designed and checked long-term deflection for flat slabs of a commercial building
• Prepared structural layout, designed beams and prepared scheduling for a condominium project with two towers, a podium and a sky pod connecting the two towers at the 24th story

Singapore

• Conducted equipment checklist for a petrochemical plant
• Prepared weight control report of an offshore platform
• Designed a telecommunications tower by using Structural Analysis Software (SACS)

Doctor Of Philosophy (Phd), Structural Engineering, Mechanics And Materials

Activities and Societies: Volunteer translator for Hesperian Health Guide on Ending Gender-based Violence, Volunteer in Berkeley Project.

Master Of Science (Msc), Civil Engineering, Distinction

Activities and Societies: Distribution of food to the homeless in Central LondonGraduated with Distinction Dissertation titled "Analytical.

Bachelor'S Degree, Civil Engineering

Activities and Societies: Singapore National Concrete Canoe Competition (Materials and Structural Designer), Hospital Volunteer (Member).