Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Engineering
Development, Characterization, And Modeling Of Physical, Mechanical, And Durability Properties Of Sustainable Ultra-High Performance Concrete, Tawsif M. Hasan
Development, Characterization, And Modeling Of Physical, Mechanical, And Durability Properties Of Sustainable Ultra-High Performance Concrete, Tawsif M. Hasan
ETD Archive
Ultra-High Performance Concrete (UHPC) is an advanced concrete material with superior mechanical strength, high tensile ductility, and exceptional durability, including negligible permeability. Despite these excellent material properties, the use of UHPC in structural applications is limited because of the high cost of commercially available UHPC products. Therefore, developing non-proprietary UHPC mixtures using local materials is a viable way to reduce the initial cost of UHPC. In this research, sustainable and cost-effective UHPC mixtures were developed using locally sourced materials so that UHPC may be more affordable to a wider variety of applications. Specifically, locally available Type I-II cement, local sand …
Catalytic Waste Gasification: Water-Gas Shift & Selectivity Of Oxidation For Polyethylene, Mason J. Lang
Catalytic Waste Gasification: Water-Gas Shift & Selectivity Of Oxidation For Polyethylene, Mason J. Lang
ETD Archive
As landfills approach capacity and take up valuable land space, metropolitan areas have realized the need for waste disposal alternatives. Thus, there has been a widespread use of waste incinerators in Europe and the United States [1]; [2]. Although newer technology has made incinerators more efficient, there is an increasing interest in formulating `greener’ alternatives to incinerators. Gasification converts organic and carbonaceous materials into a combination of gaseous products known as “syngas,” or synthetic gas. This process greatly reduces the amount of hazardous emissions. The syngas produced by gasifiers has a wide range of uses, including their conversion into diesel, …
Recycling Concrete For Sustainable Construction, Joseph M. Dardis
Recycling Concrete For Sustainable Construction, Joseph M. Dardis
ETD Archive
The demolition of concrete structures has made concrete debris the largest portion of the waste stream in the U.S. With landfills becoming scarcer, the need to recycle demolition debris is becoming increasingly relevant. An effective way to recycle this material is to produce recycled concrete aggregate (RCA) and use this material in the reconstruction of buildings and roads. Producing and re-using RCA will reduce landfill waste and save energy by minimizing the production and transport of natural aggregates. The focus of this thesis is to quantify how much energy can be saved by producing and re-using RCA instead of landfilling …
Developing A Protocol For An Environmentally Preferable Purchasing Plus (Epp+) Program At Nasa Glenn Research Center, Amarin Kongtawelert
Developing A Protocol For An Environmentally Preferable Purchasing Plus (Epp+) Program At Nasa Glenn Research Center, Amarin Kongtawelert
ETD Archive
EPP+ or Environmentally Preferable Purchasing Plus is a Environmentally Preferable Purchasing program with incorporated a unique Life Cycle Assessment (LCA) scoring system which implemented at NASA, Glenn Research Center. A protocol has been developed to aid in selecting among products based on principles of Environmentally Preferable Purchasing (EPP) and Life Cycle Assessment (LCA). The protocol has been developed for use at NASA Glenn Research Center (GRC) but is intended to benefit anyone wishing to make sustainable purchasing decision. The protocol was designed as a web-based application which evaluates the life cycle factors, affirmative procurements, price, and performance of products that …
Greenometer-7: A Tool To Assess The Sustainability Of A Building's Life Cylce At The Conceptual Design Phase, Muhammad Musa Mer'eb
Greenometer-7: A Tool To Assess The Sustainability Of A Building's Life Cylce At The Conceptual Design Phase, Muhammad Musa Mer'eb
ETD Archive
This study presents a tool that has been developed to measure and subsequently improve the sustainability performance of a building over its entire life-cycle while still at the conceptual design stage. This forecasting tool is called GREENOMETER-7. GREENOMETER-7 is a LCA tool and it evaluates the projected building at two levels: micro- and macro-assessment. The micro-assessment level provides in-depth analysis of the building products, components, and operations however, the macro-assessment level measures the sustainability performance of the building as a whole and covers areas that are not applicable at the product or component level. Both levels consist of categories and …