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- W574819407 abstract "Minimizing lane down-time is of key importance when repairing concrete pavements in high traffic volume areas. As a result, rapid setting repair materials are in great demand. Many such products are available, however, they differ widely in chemical composition, workability, durability, and cost. The following four proprietary rapid setting materials were chosen for laboratory and field evaluation: (1) Duracal (a water-activated blend of portland cement and gypsum); (2) Set-45 (a water-activated magnesia phosphate); (3) Gilco Highway Patch (a water-activated modified portland cement); and (4) Neco-crete (a magnesia powder which is activated by an ammonium phosphate solution). The repair mixes contained both fine and coarse aggregate. Techniques used to place and finish the repairs were similar to those used with conventional portland cement concrete. Laboratory results include thee following: (1) compressive strengths, flexural strengths and Gilmore Needle set times of materials mixed and air-cured at 40, 72, and 110 degree F (4, 22, and 43 degree C); (2) change in length of air-cured specimens; and (3) resistance of specimens to freeze-thaw cycles. Field repairs were made in the Waco, Amarillo, Dallas, and Houston districts. Several small full-depth punchouts were repaired in each of these districts using the rapid setting materials. (Author)" @default.
- W574819407 created "2016-06-24" @default.
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- W574819407 date "1984-07-01" @default.
- W574819407 modified "2023-09-27" @default.
- W574819407 title "LABORATORY AND FIELD EVALUATION OF RAPID SETTING MATERIALS USED FOR REPAIR OF CONCRETE PAVEMENTS" @default.
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