DR. GEORGE DAVID OGINGA OKWADHA


POSITION
FACULTY: ENGINEERING SCIENCES AND TECHNOLOGY
SCHOOL: INFRASTRUCTURE AND RESOURCE ENGINEERING
DEPARTMENT: CIVIL AND CONSTRUCTION ENGINEERING
CURRENT DESIGNATION: SENIOR LECTURER
OFFICE EMAIL: george.okwadha@tukenya.ac.ke
OFFICE TELEPHONE: +254(020) 2219929, 3341639, 3343672
CONSULTATION HOURS: 9AM-5PM MON - FRI
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EDUCATION
Qualification Area of Specialization Institution Year
DOCTOR OF PHILOSOPHY (PHD)ENVIRONMENTAL ENGINEERING....UNIVERSITY OF WISCONSIN-MILWAUKEE. (UNITED STATES)2010.
MASTERS OF SCIENCE (M.SC.)ENVIRONMENTAL ENGINEERING....UNIVERSITY OF WISCONSIN-MILWAUKEE. (UNITED STATES)2006
BACHELOR OF SCIENCE (BSC)ENVIRONMENTAL SCIENCE-PHYSICAL SYSTEMS UNIVERSITY OF WISCONSIN-GREEN BAY (UNITED STATES)2003
BACHELOR OF SCIENCE (BSC)CIVIL ENGINEERING....UNIVERSITY OF WISCONSIN-MILWAUKEE. (UNITED STATES)2003
HIGHER DIPLOMACONSTRUCTION ENGINEERING (SOIL MECHANICS & FOUNDATION ENGINEERING OPTION)THE KENYA POLYTECHNIC (KENYA)1991
DIPLOMACIVIL ENGINEERINGTHE MOMBASA POLYTECHNIC (KENYA)1986
WORK EXPERIENCE
Period Position Institution
JANUARY 2014 - SEPTEMBER 2015CHAIRMAN, CIVIL & CONSTRUCTION ENGINEERING DEPARTMENTTHE TECHNICAL UNIVERSITY OF KENYA (KENYA)
AUGUST 2010 - JUNE 2011LECTURER OF ENGINEERINGUNIVERSITY OF WISCONSIN-ROCK COUNTY (UNITED STATES)
JANUARY 2009 - JUNE 2010RESEARCH ASSISTANTUNIVERSITY OF WISCONSIN-MILWAUKEE (UNITED STATES)
SEPTEMBER 2012 - JANUARY 2014CHAIRMAN, CIVIL & ENVIRONMENTAL ENGINEERING DEPARTMENTTHE TECHNICAL UNIVERSITY OF KENYA (KENYA)
JANUARY 2005 - JANUARY 2009TEACHING ASSISTANTUNIVERSITY OF WISCONSIN-MILWAUKEE (UNITED STATES)
OCTOBER 2010 - FEBRUARY 2012RESEARCH/PROJECT ENGINEERBLOOM COMPANIES, LLC (UNITED STATES)
AUGUST 2011 - DECEMBER 2011ADJUNCT PROFESSORCONCORDIA UNIVERSITY-WISCONSIN (UNITED STATES)
JANUARY 1987 - DECEMBER 1999SENIOR LABORATORY TECHNOLOGISTMATERIALS TESTING & RESEARCH DEPARTMENT, MINISTRY OF PUBLIC WORKS (KENYA)
JANUARY 2014 - AUGUST 2015AG. DIRECTOR OF SCHOOL - SIRETHE TECHNICAL UNIVERSITY OF KENYA (KENYA)
APRIL 2007 - AUGUST 2010STUDENT ENGINEERWE ENERGIES (UNITED STATES)
JANUARY 2004 - APRIL 2007ENGINEERING TECHNICIANGILES ENGINEERING ASSOCIATES (UNITED STATES)
GENERAL STATEMENT ON RESEARCH AREA(S)
My research areas include but not limited to sustainable materials, coal combustion flue gas adsorbents, Biogeotechnics (microbial soil strength improvement), Metals and radionuclides contaminants removal in surface water impoundments and drinking water from aquifers and private wells using microbial carbonate precipitation (lattice and non-lattice coprecipitation) and nanoparticles (nano-size cenospheres) composites, Heat transfer using Conductive Concrete, and By-products utilization.
CURRENT RESEARCH PROJECTS
Title Area
Improvement of bearing capacity of red coffee soil using waste thermosetting plasticsGeo-Enviroonmental Engineering - By products utilization - (Sustainable materials)
The use of pyroclastics as coal combustion flue gas adsorbentsEnvironmental Engineering - By products utilization (Sustainable Materials)
Investigation on why clay bricks made in Elgeyo Marakwet county is preferred as a valuable construction material in Uasin-Gishu County.Geotechnical Engineering
The use of rice husk ash for stabilization of red coffee soils for use in pavement constructionGeo-Environmental Engineering - By products Utilization (Sustainable Materials)
Evaluating the performance of Sisal sap as an admixture in concreteEnvironmental Engineering-By-products utilization (Sustainable materials)
Evaluating the performance of Aloe vera sap as an admixture in concreteEnvironmental Engineering-By-products utilization (Sustainable materials)
Developing a database of leguminous plants waste ashes with pozzolanic activities for use as partial replacement of cement in concrete manufactureGeo-Environmental Engineering - By-products utilization (Sustainable Materials)
SELECTED PUBLICATIONS
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Evaluation of Surface Water Runoff from Fly Ash–Stabilized and Nonstabilized Soil Surfaces




 http://ascelibrary.org/doi/abs/10.1061/(ASCE)EE.1943-7870.0000214
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Optimum conditions for microbial carbonate precipitation

George D.O. Okwadha, Jin Li

http://www.sciencedirect.com/science/article/pii/S0045653510010933
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Biocontainment of polychlorinated biphenyls (PCBs) on flat concrete surfaces by microbial carbonate precipitation

George D.O. Okwadha, Jin Li

http://www.sciencedirect.com/science/article/pii/S0301479711001927

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Biocontainment of PCBs on flat concrete surfaces and coprecipitation of PCBs and metals in boiler chemical cleaning wastewater by microbial carbonate precipitation

By Okwadha, George D.O., Ph.D., THE UNIVERSITY OF WISCONSIN - MILWAUKEE, 2010, 143 pages; 3416634

http://gradworks.umi.com/34/16/3416634.html
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Thermal Removal of Mercury in Spent Powdered Activated Carbon from TOXECON Process.





http://ascelibrary.org/doi/abs/10.1061/(ASCE)EE.1943-7870.0000074
- Coal Combustion Utilization Handbook, 3rd Edition. Bruce W. Ramme; Mathews P. Tharaniyil. Reviewed by Dr. Okwadha http://www.we-energies.com/environmental/recycle_coalash.htm
- Partial replacement of river sand with volcanic pyroclastics as fine aggregates in concrete production. By Okwadha, GDO and Ngengi KJ http://www.iosrjournals.org/iosr-jmce/pages/13(5)Version-3.html
- Partial replacement of cement by plant solid waste ash in concrete production. By Okwadha GDO http://www.iosrjournals.org/iosr-jmce/pages/13(5)Version-3.html
- Effectiveness of rice husk ash in stabilizing Kenyan Red Coffee soil for road subgrades construction. G.D.O. Okwadha and P.W. Nyingi http://link.springer.com/article/10.1007/s13762-016-1092-2
CURRENT POSTGRADUATE STUDENTS SUPERVISION
Name Project Title Period
Mr. Stanley Ng’ang’a KibeGroundwater mapping, Quality Assessment and Hydrogeophysical modeling in Makueni County-Eastern KenyPhD (2014-to date). On going.
Mr. John GitauApplication of Vibro compaction technology for production of soil cement feather fibre stabilized building blocksPhD (2016-to date). On going.
Mr. Richard Oruko Ong'ong'Bioremediation of Tannery-based chromium IV complexes in soils near dumpsites in Kenya.Msc. (2016-to date). On going.
PROFESSIONAL AFFILIATIONS AND SOCIETIES
Registered Graduate Engineer, Engineers Board of Kenya

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