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Full-Text Articles in Engineering
Fluid Isolator, Purdue Ect Team
Fluid Isolator, Purdue Ect Team
ECT Fact Sheets
The reliability of concrete infrastructure is vital to ensuring daily life, as well as commerce, can progress without interruption. From the pavement of interstate highways to the driveways and sidewalks in a local neighborhood, concrete is expensive to install and often even more expensive, and intrusive, when it needs to be replaced. Unfortunately, to maintain functionality in winter climates concrete is heavily exposed to deicing salts. This not only affects the roads, driveways, and sidewalks where salt is applied directly, but many other areas such as parking and residential garages where vehicles (and people) will track salt along with water …
Encapco Emulsified Treated Base Product, Purdue Ect Team
Encapco Emulsified Treated Base Product, Purdue Ect Team
ECT Fact Sheets
Encapco’s organic-based asphalt emulsion is used to immobilize lead in contaminated soil. Unlike other fixation or stabilization technologies, which physically bind contaminants in the soil matrix, Encapco’s emulsion is capable of chemically fixating lead. The Encapco process employs a chemical binding reaction in addition to encapsulation to meet regulatory leaching tests. The Encapco process has been evaluated on a number of contaminated materials ranging from silty sand from a quarry site, contaminated sand from a steel mill, and a foundry sand.
Funnel & Gate System, Purdue Ect Team
Funnel & Gate System, Purdue Ect Team
ECT Fact Sheets
The limited success and high cost of traditional 'active' ground-water-contaminant plume management efforts (i.e., pump-and-treat systems) has stimulated a search for less expensive 'passive' plume interception and in-situ treatment technologies. The 'funnel and gate system,' which uses heterogeneous (surface-mediated) reactions on porous media to degrade dissolved contaminants, is one passive technology under consideration.
In Situ Remediation Using Horizontal Wells, Purdue Ect Team
In Situ Remediation Using Horizontal Wells, Purdue Ect Team
ECT Fact Sheets
Horizontal well technology has been widely used in petroleum and underground utility installation. Since late 1980's, the technology has been adapted for environmental remediation applications. Two general methods in drilling horizontal wells have been used in remediation, trenched and directionally-drilled. The first method involves the excavation of a relatively large diameter borehole, with simultaneous installation of well materials and backfill. The second method, directional drilling, produces a smaller diameter borehole and well materials are installed following the completion of drilling activities.
Jet-Grouting Constructed Laminar Diaphragms, Purdue Ect Team
Jet-Grouting Constructed Laminar Diaphragms, Purdue Ect Team
ECT Fact Sheets
The high cost of digging and hauling contaminated soil has made enclosure of the contaminated soil an alternative to prevent contamination of ground water and adjacent sites. The jet-grouting method uses special grout nozzles to create a grout sheet of controlled width and thickness from each drilled grout hole. This sheet is commonly 100 mm. to 150 mm. in thickness, 2 to 3 meters in width, and of any desired length. The width of the sheet in one pass can go up to 6 meters. Actual lateral soil penetration of the grout jets is a function of the nature of …
Extraction Of Contaminated Soil Using High Pressure Jet Grouting, Purdue Ect Team
Extraction Of Contaminated Soil Using High Pressure Jet Grouting, Purdue Ect Team
ECT Fact Sheets
Removal of contaminated soil underneath existing structures causes settlement. There is a need for a remediation technology that eliminates this problem. The jet grouting by the triple rod system can be combined with an on site remediation technology (e.g., soil washing). Jet grouting was developed primarily for underpinning and/or excavation support. The benefits of this technology lie in the future reduction of structural settlement, and site access flexibility.
Glass Diaphragm Walls, Purdue Ect Team
Glass Diaphragm Walls, Purdue Ect Team
ECT Fact Sheets
The materials currently applied to confine contaminated soils are not the best solution (ex. slurry walls). A new contaminant confining material is presented where the costs of digging and hauling the contaminated soil are eliminated. For contaminant enclosure, the new technology incorporates a diaphragm wall system consisting of special glass panels with a sealing made out of glass.
Plasma Arc Torch Technology, Purdue Ect Team
Plasma Arc Torch Technology, Purdue Ect Team
ECT Fact Sheets
For many years, in-situ thermal vitrification has been recognized as one method to remediate contaminated soils and help stabilize land fills. However, the complexity of the process and the uncertainty of the results have limited the use of this remediation technique.A plasma is a gas that has been ionized by the electric arc of a plasma torch and can therefore respond to electrical and magnetic fields. Plasma arc technology can create plasma using almost any type of gas (oxygen, nitrogen, carbon monoxide, air, etc.) and in a wide range of pressures (vacuum to 20 atmospheres).The process of plasma remediation of …
Dma™: Digestion Material For Asbestos, Purdue Ect Team
Dma™: Digestion Material For Asbestos, Purdue Ect Team
ECT Fact Sheets
Current techniques for removing asbestos- containing fireproofing require the construction of air-tight barriers, labor- intensive scraping of the fireproofing, and the installation of new asbestos-free fireproofing. The DMATM product is the result of a joint development by W.R. Grace & Co. and Department of Energy's Brookhaven National Laboratory. The new technology uses a foamy solution sprayed directly onto asbestos-containing fireproofing. After absorbing into the fireproofing, the foam chemically digests asbestos fibers and dissolves them into harmless minerals. The process is the first to chemically destroy asbestos without first removing the fireproofing.