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Abstract:Tests to identify effective waterproofing materials for hardened concrete are described. Test results and limited cost data are given. Wetting-drying tests were made to measure the percentage weight of water infiltrating through treated surfaces of concrete partially submerged in tap water. Freeze-thaw tests were made of sealed concrete surfaces ponded with brine. Eighteen surface treatments were tested; they included linseed oil, silicones, epoxies, and others. Percentage weight of water absorbed and number of freeze-thaw cycles are tabulated. Moisture absorption curves and photographs of freeze-thaw specimens are included. Epoxies and linseed oil were the most effective of the treatments in these tests. On the basis of effectiveness, ease of application, and low cost, linseed oil appeared to be the best suited under the test condition.
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