详情

原文传递 CRACK SEALING AND REPAIR OF OLDER SERVICEABLE BRIDGES USING POLYMER SEALERS

题名：	CRACK SEALING AND REPAIR OF OLDER SERVICEABLE BRIDGES USING POLYMER SEALERS
作者：	David A. Meggers, P.E.
关键词：	High Molecular Weight Methacrylate Epoxy Crack Sealing Chloride Concentration Freeze/Thaw, Wet/Dry Corrosion Rate
摘要：	The objective of this study is to determine the feasibility of using High Molecular Weight Methacrylate (HMWM) and EPOXY Healer Sealers for crack sealing and repair of older serviceable bridges. The study included the field application of two HMWM materials and one EPOXY material to eight bridges throughout Kansas, The field application of the materials was performed in 1992 and the field-testing was completed in 1995. Each treated bridge deck also included an untreated control section. Laborato7 testing was performed and included the two HMWM materials and one EPOXY material applied in foe field and an additional HMWM material that was not tested In the field. A control set of untreated beams was also included in foe laboratory testing. Laboratory tests included wet/dry, freeze/thaw, and salt ponding and were completed in 1995. The results of foe field portion of foe study were inconclusive. Chloride concentration levels of foe sealed sections and the control sections were inconsistent. However, foe results of foe laboratory tests on foe three sealers tested in foe field, plus foe additional sealer added for later evaluation, indicated a definite difference in foe performance of foe four sealers. The results of the study indicated that foe sealer must be properly applied shortly after foe cracks are formed to maximize foe penetration and protection of foe structure. Attempts should be made to clean foe cracks before application of the sealers. The optimum sealer would be one with a relatively low viscosity, 0.5 Pa s or less, tensile elongation often (10) percent or more and a tensile strength of at least eight (8) MPa.
报告类型：	科技报告