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- W53783758 abstract "Details are given of the first road repair trial at a pumping joint on the heavily trafficked A40 Western Avenue, London, made in 1977 using the Balfour Beatty Balvac method. A brief resume is given of the subsequent developments in repairing concrete roads and lean-mix concrete based roads of flexible construction. In use, the structure forms the vacuum tank relying on the self sealing characteristics of a polythene envelope under vacuum. Step-by-step details are given of the method and the apparatus used in the successful overnight repair carried out in freezing temperatures. Further field and laboratory investigations were carried out to determine the effect of the sub-grade which was impervious boulder-clay at the A40 site. It was found that the process worked equally well on the section of the A1 at South Mimms with a sub-base of highly porous crushed clinker. In this case both longitudinal and transverse deflecting cracks could be treated, one lane at a time, where the road could be fully opened to traffic within a half hour if need be. A computer model, used to compare the estimated costs incurred by delays and diversions, showed that, at 1977 prices vacuum grouting at off peak periods was more effective than reconstruction with either partial or full closure. (TRRL)" @default.
- W53783758 created "2016-06-24" @default.
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- W53783758 date "1983-05-01" @default.
- W53783758 modified "2023-09-26" @default.
- W53783758 title "VACUUM GROUTING OF CONCRETE ROAD SLABS" @default.
- W53783758 hasPublicationYear "1983" @default.
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