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User:E.Kreiger

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Eric Kreiger[edit]

Eric Kreiger
Eric Kreiger

Summary[edit]

Eric Kreiger graduated with a Bachelor's degree in Civil Engineering from the Department of Civil and Environmental Engineering and a Minor in Physics from Michigan Technological University in 2009. In 2008 he conducted research on the partial replacement of portland cement with supplementary cementitious materials (fly ash, blast furnace slag, and limestone dust).

Eric graduated in 2012 with a Master's degree in Civil (Structural) Engineering from Department of Civil and Environmental Engineering at Michigan Tech. He conducted research in concrete materials (conventional concrete, geopolymer concrete, and ultra-high performance concrete). His thesis work focused on the post cracking behavior of ultra-high performance concrete (UHPC). During 2013, Eric performed research analyzing possible thermal bridges in common military building envelope assemblies as an ORISE fellowship participant at theUS Army Construction Engineering Research Laboratory.

Eric is currently working as a Structural EIT at a engineering firm dedicated to commercial building design.

Interests[edit]

Eric's interests include building condition assessment, remediation and renovation of existing and historical buildings, building science and building performance, analysis and characterization of building materials with a particular interest in concrete, and Additive Layer Construction (3D Printing) of concrete.

Research[edit]

A look at the effects of the partial replacement of portland cement on the mechanical strength, material properties, and durbility of concrete

A variety of concrete mix designs partially replacing various amounts of portland cement with sumplimentary cementitious materials (SCM), including Fly Ash, blast furnace slag, and limestone dust, were tested for the Michigan Department of Transportation. The results of these mixes were compared against a typical concrete mix. Prior to testing, research was done to determine the effects of SCMs on the mechanical properties and chemistry of concrete. Testing included the determination of compressive strength, freeze-thaw durability, air content by air void analysis, and material characterization by scanning electron microscopy.


The development of a design model to determine the the post cracking capacity of a steel fiber reinforced ultra-high performance concrete

Over 250 three-point bending tests were performed in a parametric study to determine the post cracking behavior of a steel fiber reinforced ultra-high performance concrete (UHPC). Testing was done on centralized notched prisms with variations in the curing age, fiber content, span-to-depth ratio, cross-section, and method of curing (ambient curing vs. heat and moisture curing). Preparations for testing and data analysis included the development of a specimen preparation and testing procedure, as well as a background study on fiber reinforced concrete, UHPC, composite materials, fracture mechanics, and fracture testing. The results of this research determined that the entire load-crack opening displacement curve and fracture energy could be described by a modified Weibull equation.


An assessment of the thermal performance of blast resistant windows

A review of common army facility enclosure types and blast resistant window systems was performed in order to develop a heat transfer model in HEAT3. Prior to modelling, information was gathered on blast resistant design procedures and standards (DOD Unified Facilities Criteria and Protective Design Center technical reports), ASHRAE standards (90.1, 189.1, 1365), ISO 10211, the International Energy Conservation Code, and several papers on thermal bridging (See literature review).

Literature Review


Development of an Army Construction Catalog for the Mitigation of Thermal Bridges in Building Envelopes

The development of a catalog on the mitigation of a set of common thermal bridges by an interdisciplinary team of Architects, engineers, and building scientists. Work included compiling a set of common details that are know to be associated with thermal bringing issues, and the development of possible mitigation strategies. The results are currently being compiled into a catalog to be used by the US Army corps of engineers for the remediation and prevention of thermal bridges in buildings.


Additive Layer Construction (3D Printing) of Concrete Structures

The fresh and hardened properties of concrete depend on the design of the concrete mixture. By controlling the material constituents it is possible to develop a concrete that is well suited for additive layer concrete construction (ALCC). The primary concerns for ALCC is the pressurized rheology, ambient rheology, stability, strength, and durability. Eric has been researching printable concrete mix designs, as well as the process and design of concrete printers.