Guide to Improving the Effectiveness of Cement-Based Stabilization/Solidification
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Guide to Improving the Effectiveness of Cement-Based Stabilization/Solidification
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Guide to Improving the Effectiveness of Cement-Based Stabilization/Solidification

Author: Jesse R. Conner | Size: 0.4 MB | Format: PDF | Publisher: PCA | Year: 1997 | pages: 55 | ISBN: 0893121762

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Provides information on additives and field techniques that can improve the effectiveness of cement-based stabilization/solidification treatment of wastes. This 47-page guide includes discussions commonly occurring hazardous constituents in wastes and suggests additives and field techniques that can be used to successfully stabilize these constituents.

Portland cement-bases stabilization/solidification (S/S), has been used to successfully treat a wide variety of wastes. Some situations (because of the waste itself, the disposal scenario, and/or the regulatory requirements) require the use of additives or physical/chemical techniques to improve the effectiveness of cement-based S/S. The problems encountered in S/S can be broadly classified into solidification problems, i.e., adequately immobilizing the hazardous constituents of the waste. The Guide lists additives and techniques that can be applied to specific solidification problems such as problems in development of set, compressive strength, and free liquids. Also included are lists of additives and techniques that can be applied to immobilization of specific hazardous constituents such as lead, cadmium, and chromium, as well as classes of constituents such as volatile organics, organo-metallics and soluble salts. The Guide lists a variety of generic additives for specific desired stabilization/solidification effects, including those that can be used to control the pH of wastes; to reduce, oxidize, and co-precipitate constituents; and to accelerate or retard set. Contents 1. Introduction 2. Problems in Solidification and Physical Property Development - Setting Problems - Compressive Strength Development Problems - Permeability Development Problems - Durability Problems 3. Problems in Target Constituent Stabilization - Chemical Properties - Metals - Organics - Organo-Metallics - Soluble Salts 4. Additives Used in Cement-Based Solidification/Stabilization - Metal Stabilization - Immobilization of Organic Constituents -Processing and Anti-Inhibition Aids 5. Physical/Chemical Techniques Used in Cement-Based Solidification/Stabilization - Anti-Inhibition Aids - Physical Property Development - Processing Aids - Mixing Techniques


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