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EFFECT OF FREEZE-THAW ON THE HYDRAULIC CONDUCTIVITY OF BARRIER MATERIALS: LABORATORY AND FIELD EVALUATION
Citation:
Kraus, J. F. AND C. H. Benson. EFFECT OF FREEZE-THAW ON THE HYDRAULIC CONDUCTIVITY OF BARRIER MATERIALS: LABORATORY AND FIELD EVALUATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-95/118 (NTIS PB95-253928), 1995.
Impact/Purpose:
information
Description:
Laboratory tests were conducted on barrier materials to determine if their hydraulic conductivity changes as a result of freezing and thawing. esults of the tests were compared to data collected from a field study. ests were conducted on two compacted clays, one sand-bentonite mixture, three geosynthetic clay liners, and three paper mill sludges. nalysis of the data showed that compacted clays undergo large increases in hydraulic conductivity in the field and laboratory when exposed to freeze-thaw, with the increase in hydraulic conductivity being larger in the field. n contrast, both the laboratory and field tests showed that sand-bentonite mixtures and geosynthetic clay liners are not affected by freeze-thaw. he sludges behaved similar to the clays; that is, they undergo large increases in hydraulic conductivity when frozen and thawed. owever, the hydraulic conductivity of one of the sludges only increased if it was not permeated between freeze-thaw cycles.
