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DTIC ADA234566: Repair, Evaluation, Maintenance, and Rehabilitation... |
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by Defense Technical Information Center |
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Remedial seepage control of earth dams is a critical |
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problem. Concrete cutoff walls may be used in some |
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situations. Since the walls in their simplest structural |
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form are rigid diaphragms, deformations of earth |
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embankments due to increase in reservoir level or seismic |
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activity could cause failure which would greatly decrease |
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the flow efficiency of cutoff walls and jeopardize the |
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safety of dams. In response to this dilemma, engineers in |
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Europe, Asia, and South America have used plastic |
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concrete, which has deformation characteristics similar |
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to earth dams, to construct cutoff walls. Plastic |
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concrete consists of aggregate, cement, water, and |
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bentonite clay mixed at a high water-cement ratio to |
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produce a ductile material. Geotechnical engineers in the |
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United States have been reluctant to specify the use of |
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plastic concrete for cutoff walls due to limited |
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documentation of field performance of existing cutoff |
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walls and lack of laboratory test data on plastic |
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concrete under test conditions which approximate field |
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behavior. This research was conducted to quantify the |
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stress-strain- strength behavior and permeability of |
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plastic concrete, and to develop design data for |
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specifying plastic concrete for use in a diaphragm cutoff |
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wall for an earth dam. |
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Date Published: 2018-03-02 00:52:20 |
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Identifier: DTIC_ADA234566 |
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Item Size: 97138172 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Kahl, Thomas W ; ARMY E... |
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