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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Joint Sealing in Reclamation Canals
Author(s): Henry Johns
Publication: Journal Proceedings
Appears on pages(s): 14-18
Keywords: asphalts; canal linings; concretes; cracking (fracturing) ; epoxy resins; field tests; joint fillers; joint sealers; joints (iunctions) ; polyvinyl chloride; portland cements;rubber; seepage; silicon compounds; sulfides.
Abstract:Reviews U. S. Bureau of Reclamation experience with sealing joints and cracks in concrete-lined canals. After several decades experience, two basic systems for sealing contraction joints, and two for sealing cracks have resulted. For crack sealing, seals formed of either a coal tar extended polfide rubber sealant or a glass cloth reinforced phalt mastic tape are used. For joint sealing, PVC plastic contraction-joint-forming waterstop inserted into fresh concrete or coal tar extended polysulfide sealant are used. The polysulfide may be machine extruded into fresh or hardened concrete or installed as a preformed strip in fresh concrete. The two joint sealing systems seem to be competitive in cost and at a price only somewhat higher than the old asphalt mastic which afforded only half the service life. The long-term cost for sealing with the new systems thus appears to have been reduced by at least 50 percent.
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