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- W593605846 abstract "This paper summarises an investigation by the Transport and Road Research Laboratory (TRRL) of the result of comparative trials of falling weight deflectometer (FWD) systems used by four survey contractors in the UK. The main purposes of this study of a range of road surfaces were to: (1) provide information on the consistency of different FWD systems, with respect to their estimates of pavement layer stiffness and residual life and their recommendations for maintenance treatments; (2) compare the FWD estimates of residual life and recommended treatment with those provided by current practice in the UK. Each survey contractor was allocated half a day to survey each of four sites, and was requested to evaluate pavement layer stiffness at each test location. Results were obtained on: (1) deflection measurements; (2) bound layer stiffness; (3) foundation stiffness; (4) residual life; (5) recommended maintenance treatments. The deflection measurements, made by the different FWDs tested, showed good consistency. It was found that an indication of layer stiffness could be obtained using the services of the four survey contractors. The present FWD design methods predicted residual lives significantly longer than, and often strengthening treatments significantly different from, reference values based on the TRRL design method using delfectograph measurements. (TRRL)" @default.
- W593605846 created "2016-06-24" @default.
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- W593605846 date "1990-01-01" @default.
- W593605846 modified "2023-09-26" @default.
- W593605846 title "COMPARATIVE TRIALS OF FALLING WEIGHT DEFLECTOMETER SYSTEMS IN USE IN THE UNITED KINGDOM . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2" @default.
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