Graduate Studies
Date of this Version
5-2014
Document Type
Article
Abstract
Under Contract HDTRA1-10-P-0060 funded by U.S. Defense Threat Reduction Agency (DTRA), a high-performance electrically conductive concrete for high-altitude electromagnetic pulse shielding was developed at the Peter Kiewit Institute (PKI). Our main foci of the research and development effort were the demonstration of constructability as well as the shielding effectiveness (SE) of large-scale construction using HPC+. Specialized concrete mixtures and casting procedures were created and subsequently utilized. Electromagnetic wave measurements demonstrated that a 12-in. thick concrete enclosure could exceed military standards in SE. Specific ingredients were determined to be crucial to provide the shielding effectiveness in the concrete mixture across the frequency range of the military standards (MIL-STD) based on the experiments using an ASTM-D4935-99 SE test fixture. During this effort, four HPC+ test cubes and a full-size shelter were cast to establish constructability and were further tested for SE compliance with MIL-STD-188-125-1. The resulting measurements have extensively modeled an HPC+ structure that meets the SE requirements per MIL-STD, denoting the first of its nature.
Adviser: Christopher Tuan
Comments
A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Civil Engineering, Under the Supervision of Professor Christopher Tuan. Lincoln, Nebraska: May, 2014
Copyright (c) 2014 Adam Sevenker