| Controlling Sulfate Attack in Mississippi Department of Transportation Structures |
Aug 2010 |
58 pages |
| Authors:
Weiss; Charles A Jr; Melvin C Sykes; Toy S Poople; Joe G Tom; Brian H Green; Billy D Neeley; Philip G Malone; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
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 | At some construction sites in Mississippi, deterioration of concrete in contact with the surrounding soil could be related to the high sulfate content of the adjacent soils. Studies dating to 1966 have documented sulfate attack associated with specific types of sulfide or sulfate-rich soils. Future highway-related construction must include specified procedures and materials that will ensure the service life of concrete construction is not reduced by such aggressive soils. In ... |
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| Using Natural Cementation Systems to Control Corrosion Dust on Un-surfaced Roads |
Feb 2010 |
21 pages |
| Authors:
Paul G Allison; David M Bailey; Melvin C Sykes; Weiss; Charles A Jr; Philip G Malone; Sean W Morefield; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| The Use of Zinc-Lead Composites to Prevent the Corrosion of Lead |
Feb 2010 |
16 pages |
| Authors:
Sean W Morefield; Weiss; Charles A Jr; Phillip G Malone; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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| The Use of Organic Humectants as Non-Corrosive Dust Control Agents |
Feb 2010 |
12 pages |
| Authors:
Sean W Morefield; Weiss; Charles A Jr; Philip G Malone; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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| Producing Durable Continuously Reinforced Concrete Pavement using Glass-ceramic Coated Reinforcing Steel |
Feb 2010 |
24 pages |
| Authors:
Sean W Morefield; Brett A Williams; Weiss; Charles A Jr; Philip G Malone; Mike Koenigstein; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL
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| PRESENTATION: The Corrosion Problem in Pavements * Nature of the Vitreous-Ceramic Coating * Ease of Application to Reinforcement Steel * Bond Strength and Corrosion-Resistance * Field Demonstration Program * Testing in Reinforced Concrete Pavement * Summary of Current Status. FRAMING THE PROBLEM: The predicted service life of continuously reinforced concrete pavement can be shortened if the rebar in the pavement corrodes prematurely and delaminates the pavement. Moisture and chlorides can ... |
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| Using Bonding Enamel-Coated Steel Fixtures to Produce More Durable Brick/Masonry Structures |
Feb 2010 |
24 pages |
| Authors:
Steven C Sweeney; Brett A Williams; Weiss; Charles A Jr; Sean W Morefield; Philip G Malone; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
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| Topics discussed in this briefing include: *Problems with Masonry Ties; *Properties of Bonding Coatings; *Effects of Corrosion and Failure; *Types of Ties and Installation; *Standardization; *Target Test Site; and *Test Program and Metrics. |
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| The Use of Vitreous Enamel Coatings to Improve Bonding and Reduce Corrosion in Concrete Reinforcing Steel |
Feb-2009 |
31 pages |
| Authors:
Philip G Malone; Sean W Morefield; Vincent F Hock; Weiss; Orange S Marshall; Donna C Day; Charles A Jr; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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| Overview: * Corrosion of Reinforcing Steel in Concrete * Strategies to Prevent Corrosion * Alkali-resistant Vitreous Enamel Testing and Results * Ongoing Demonstration Work at CCAD * Summary |
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| Release of Metal Impurities from Carbon Nanomaterials Influences Aquatic Toxicity |
Jan 2009 |
8 pages |
| Authors:
Matthew S Hull; Alan J Kennedy; Jeffery A Steevens; Anthony J Bednar; Weiss; Charles A Jr; Peter J Vikesland; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
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| Few studies have considered the environmental impacts of impurities and byproducts associated with low-efficiency nanomanufacturing processes. Here, we study the composition and aquatic toxicity of low-purity, as-produced fullerenes (C60) and metallofullerene waste solids, both of which were generated via arc-discharge synthesis. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEMEDX)and inductively coupled plasma mass spectroscopy (ICPMS)were used to characterize the metals composition of the solid test materials and of aqueous ... |
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| Innovative Multiphase Nanoparticle Composites Developed Using Electrophoresis And Electromigration |
Dec-2008 |
5 pages |
| Authors:
S W Morefield; B P Dipaolo; P G Malone; M K McInerney; Weiss; C A Jr; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
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| Electrokinetic material fabrication techniques such as electrophoresis, electro-osmosis or ion transport, have been useful in constructing layered composites on electrically conductive substrates. These techniques have been widely used in producing, consolidating or cementing nano-particulate phases in uniform layers. Research is being undertaken on using these electrodeposition techniques to produce fine scale changes laterally across a surface. The goal is to develop approaches to creating novel composite surface that can have ... |
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| Reactive Silicate Coatings for Protecting and Bonding Reinforcing Steel in Cement-Based Composites |
Dec-2008 |
8 pages |
| Authors:
S W Morefield; P G Malone; Weiss; C A Jr; V F Hock; M L Koenigstein; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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| Reinforced concrete (RC) is the major construction material for hardened structures for the Army. As a basis for shelters and for infrastructure reinforced concrete has two drawbacks: the bond between the concrete and its steel reinforcement at the interfacial zone is typically very weak and the increased porosity of the interfacial zone can accelerate penetration of chloride ions to the surface of the embedded steel reducing the time to the ... |
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| Application of Electrokinetic Nanoparticle Migration in the Production of Novel Concrete-Based Composites |
Dec 2008 |
6 pages |
| Authors:
Sean W Morefield; Vincent F Hock; Weiss; Charles A Jr; Philip G Malone; ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB
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| Electrophoresis has been widely used to build up complex composites by infiltrating particulate phases into porous ceramics and to facilitate putting uniform mineral coatings on metal for enameling. This technique uses a potential field to move charged particles that are suspended in a fluid phase into a porous medium. Fabrication generally involves a second step that fixes the layer of particles together and bonds them to the surrounding surfaces. When ... |
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| The Fate of Nitroaromatic (TNT) and Nitramine (RDX and HMX) Explosives in Fractured and Weathered Soils |
Dec 2008 |
9 pages |
| Authors:
T A Douglas; M E Walsh; C J McGrath; Weiss; C A Jr; A M Jones; T P Trainor; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
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| We investigated the fate of explosives compounds in slurries containing fractured and weathered soil particles. Three soils were crushed with a piston to emulate detonation-induced fracturing. We used X-ray diffraction, scanning electron microscopy and gas adsorption surface area measurements to quantify the mineralogies and surfaces of the weathered and fractured soil particles. Soil batch slurries were prepared by spiking the soils with waters containing TNT, 2,4-DNT, HMX and RDX. Batch ... |
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