Recent studies have shown promising potential for using Glass Pozzolan (GP) as an alternative supplementary cementitious material (SCM) due to the scarcity of fly ash and slag in the United States. However, comprehensive studies on the... more
Recent studies have shown promising potential for using Glass Pozzolan (GP) as an alternative supplementary cementitious material (SCM) due to the scarcity of fly ash and slag in the United States. However, comprehensive studies on the freeze–thaw (FT) resistance and air void system of mixtures containing GP are lacking. Therefore, this study aimed to evaluate GP’s effect on FT resistance and characterize mixtures with different GP contents, both macro- and microscopically. In this study, six concrete mixes were considered: Three mixes with 20%, 30% and 40% GP as cement replacements and two other comparable mixes with 30% fly ash and 40% slag, as well as a mix with 100% Ordinary Portland cement (OPC) as a reference. Concrete samples were prepared, cured and tested according to the ASTM standards for accelerated FT resistance for 1000 cycles and corresponding dynamic modulus of elasticity (Ed). All the samples showed minimal deterioration and scaling and high F/T resistance with a du...
The Consortium of Universities for the Advancement of Hydrologic Science (CUAHSI) is in the process of developing an information infrastructure for the support of the hydrologic science throughout the hydrologic community. This system... more
The Consortium of Universities for the Advancement of Hydrologic Science (CUAHSI) is in the process of developing an information infrastructure for the support of the hydrologic science throughout the hydrologic community. This system will be based on a hydrologic data model integrating data from many water disciplines, as well as many related disciplines such as ecology and solid earth science, tracing the flow of water and transport of constituents throughout the landscape, and integrating data across a range of scales of ...
Mitigation of Salinity Intrusion in Well-mixed Estuaries by Optimization of Freshwater Diversion Rates. [Journal of Hydraulic Engineering 128, 64 (2002)]. Brett F. Sanders, Michael Piasecki. Abstract. The diversion of fresh water ...
Optimization of Multiple Freshwater Diversions in Well-Mixed Estuaries. [Journal of Water Resources Planning and Management 128, 74 (2002)]. Michael Piasecki, Brett F. Sanders. Abstract. A method is presented to optimize ...
Hydrodynamic model generally deals with enormous amount of data and utilizes huge computational resources for simulation. Powerful and robust servers with extensive storage capabilities are therefore desirable for rapid simulation.... more
Hydrodynamic model generally deals with enormous amount of data and utilizes huge computational resources for simulation. Powerful and robust servers with extensive storage capabilities are therefore desirable for rapid simulation. Unfortunately, it is not always possible for an ...
This paper describes the various steps to develop a web-based information system for now-and forecast oceanographic and meteorological data products. An initial user survey delineates the user needs and requirements and determines to what... more
This paper describes the various steps to develop a web-based information system for now-and forecast oceanographic and meteorological data products. An initial user survey delineates the user needs and requirements and determines to what extent and level the ...
ABSTRACT Participatory engineering has been called for after major catastrophes, yet is often bypassed due to countervailing implementation of ?quick fixes?. While immediate expert-driven solutions may be attractive, in the long-term they... more
ABSTRACT Participatory engineering has been called for after major catastrophes, yet is often bypassed due to countervailing implementation of ?quick fixes?. While immediate expert-driven solutions may be attractive, in the long-term they may be ineffective and inconsistent with the goals and capacities of local stakeholders. This article discusses the findings of National Science Foundation research by a team of three engineers and one social scientist who visited Haiti twice, four and seven months after the January 2010 earthquake, to investigate community participation in water and sanitation engineering processes in Léogâne. Methods included interviews with local inhabitants, water-sector actors, and government agencies; inspections of the engineering of the existing water and sanitation system; surveys of the affected population; and a participatory workshop to which numerous community-based organizations were invited. The research tests the potential for engineers to develop stakeholder-based participat
