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Civil Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Florida International University

2008

Articles 1 - 3 of 3

Full-Text Articles in Civil Engineering

Mechanical Properties Of Self-Consolidating Concrete With Pozzolanic Materials, Indra Prasad Chapagain Jul 2008

Mechanical Properties Of Self-Consolidating Concrete With Pozzolanic Materials, Indra Prasad Chapagain

FIU Electronic Theses and Dissertations

Self-consolidating concrete has been described as the most revolutionary development in concrete technology in several decades with the ability to flow freely through closely spaced reinforcements, expel entrapped air and self compact without vibration. Since it was first developed in Japan in the early 1980's, major development in the chemical admixture technology has made SCC more viable.

An experimental study was conducted to identify the mechanical properties of SCC by optimizing the use of pozzolanic materials and local aggregates with some proposed statistical models. The research was focused to investigate compressive strength, splitting tensile strength, modulus of elasticity and drying …


Predicting Delay Reductions From Freeway Traffic Diversion For Incident Management, Jie Bian Apr 2008

Predicting Delay Reductions From Freeway Traffic Diversion For Incident Management, Jie Bian

FIU Electronic Theses and Dissertations

Traffic incidents are a major source of traffic congestion on freeways. Freeway traffic diversion using pre-planned alternate routes has been used as a strategy to reduce traffic delays due to major traffic incidents. However, it is not always beneficial to divert traffic when an incident occurs. Route diversion may adversely impact traffic on the alternate routes and may not result in an overall benefit.

This dissertation research attempts to apply Artificial Neural Network (ANN) and Support Vector Regression (SVR) techniques to predict the percent of delay reduction from route diversion to help determine whether traffic should be diverted under given …


Investigating The Origin Of Pm2.5 In Baltimore Using Highly Time-Resolved Organic Molecular Markers Measured During The Baltimore Pm-Supersite, Anna R. Bernardo-Bricker Jan 2008

Investigating The Origin Of Pm2.5 In Baltimore Using Highly Time-Resolved Organic Molecular Markers Measured During The Baltimore Pm-Supersite, Anna R. Bernardo-Bricker

FIU Electronic Theses and Dissertations

The detailed organic composition of atmospheric fine particles with an aerodynamic diameter smaller than or equal to 2.5 micrometers (PM 2.5) is an integral part of the knowledge needed in order to fully characterize its sources and transformation in the environment. For the study presented here, samples were collected at 3-hour intervals. This high time resolution allows gaining unique insights on the influence of short- and long-range transport phenomena, and dynamic atmospheric processes. A specially designed sequential sampler was deployed at the 2002-2003 Baltimore PM Supersite to collect PM2.5 samples at a 3-hourly resolution for extended periods of consecutive days, …