Environmental Engineering Commons^™

An Enhanced Framework To Compute Road User Costs Associated With Construction Zones, Jeremiah Adebiyi

Electronic Theses and Dissertations

The monetary quantification of inconveniences caused to the road users by ongoing construction activities is known as the Road Users Costs (RUCs). While the importance of RUCs is widely known, some highway agencies lack an appropriate methodology to compute RUCs. Thus, there is a need to develop a framework to compute RUCs that can be adopted quickly by highway agencies. This study reviewed existing literature and conducted a nationwide survey to identify and summarize the current practices of computing RUCs. It developed an enhanced framework and tool to compute RUCs that balances the effort required to calculate RUCs and the …

Análisis Del Manejo De Residuos De Construcción Y Demolición Rcd Y Sostenibilidad En La Construcción En Bogotá D.C., Karen Lizeth Trujillo Vargas, Angie Paola Quintero Vargas

Ingeniería Civil

En el área de la ingeniería civil se generan grandes cantidades de Residuos de Construcción y Demolición, RCD, los cuales generan un grave impacto medio ambiental si no se tratan de manera adecuada siguiendo la normatividad legal vigente para el territorio colombiano. Según el Ministerio de Ambiente y Desarrollo sostenible, en Colombia los Residuos de Construcción y Demolición (RCD), constituyen en promedio el 40% de los residuos sólidos, y la producción media de RCD es de 22’270.338 toneladas de los cuales entre el 60% y el 90% se disponen en lugares autorizados; y el restante es dispuesto en botaderos a …

Assessment Of Carbon Dioxide Emission And Its Impact On High-Rise Mixed-Use Buildings In Egypt, Ahmed Salah Hamza

Theses and Dissertations

With Egypt's vision of 2030 focusing on sustainable development with a true emphasis on Carbon Dioxide (CO₂) emission reduction in the newly built cities and high-rise buildings, efforts are exerted on various levels towards accomplishing the vision’s goals. This is achieved through multiple tools and models associated with aiding the reduction of carbon emissions, yet not a clear one was introduced for the mixed-use buildings in Egypt.

Through this work, a significant gap was identified with respect to high-rise buildings carbon emission assessment in Egypt. This was a main driving force for this work in an attempt to …

Error Prevention In Sensors And Sensor Systems, Pedro J. Chacon Dominguez

LSU Doctoral Dissertations

Achievements in all fields of engineering and fabrication methods have led towards optimization and integration of multiple sensing devices into a concise system. These advances have caused significant innovation in various commercial, industrial, and research efforts. Integrations of subsystems have important applications for sensor systems in particular. The need for reporting and real time awareness of a device’s condition and surroundings have led to sensor systems being implemented in a wide variety of fields. From environmental sensors for agriculture, to object characterization and biomedical sensing, the application for sensor systems has impacted all modern facets of innovation. With these innovations, …

Comparison Of The Resistance Of Belitic Calcium Sulfoaluminate Cement And Portland Cement To Sulfate Attack And Sulfuric Acid, Rilye Dillard

Graduate Theses and Dissertations

Microbially induced corrosion (MIC) is a fairly common concrete deterioration mechanism with many negative effects. MIC is a complex chemical and biological process that occurs in sewage systems and is nearly impossible to replicate in a laboratory setting. For this study, sulfate and sulfuric acid attack on concrete were studied to mimic two stages of the MIC process. The ASTM C1012, Standard Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution and a modified ASTM C1012 accelerated method were used to compare the sulfate resistance of belitic calcium sulfoaluminate (BCSA) cement, portland cement (PC), and PC-fly …

Alternativas De Tratamiento De Lodos Provenientes De La Ptap Del Municipio De Fresno Tolima, Dennis Catalina Granados Durán, Jan Carlos Carrillo Ortega

Ingeniería Ambiental y Sanitaria

Los procesos de potabilización contienen coagulación, floculación, sedimentación y filtración; en los cuales se genera una gran cantidad de lodos, estos residuos deben de ser tratados para evitar problemas de bioacumulación de metales y problemáticas de turbiedad en los cuerpos de agua. A través de diferentes visitas a la PTAP Fresno se pudo determinar que se vertía los lodos del proceso de potabilización en la Quebrada la Granja sin ningún tratamiento, por lo que, en este proyecto de investigación, se realizó un análisis de alternativas para un posible tratamiento, teniendo en cuenta costos, área requerida, gasto energético, eficiencia y mantenimiento, …