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Title: POTENTIAL USES OF SONIC AND ULTRASONIC DEVICES IN HIGHWAY CONSTRUCTION
Accession Number: 00214665
Record Type: Monograph
Availability: Find a library where document is available Abstract: RESEARCH WAS INITIATED TO EVALUATE' /1/ THE PRESENT USAGE OF HIGH-FREQUENCY VIBRATIONS IN VARIOUS INDUSTRIAL AND SCIENTIFIC FIELDS, AND /2/ THE FEASIBILITY OF POSSIBLE APPLICATIONS OF SONIC AND ULTRASONIC MECHANICAL VIBRATIONAL ENERGY IN HIGHWAY ENGINEERING AND CONSTRUCTION. THE STUDY WAS DIRECTED SPECIFICALLY TOWARD EVALUATION OF POTENTIAL APPLICATIONS OF SONIC ENERGY /60 CPS TO 25 MC/. A STUDY WAS MADE OF TECHNICAL LITERATURE AND RESEARCH REPORTS ON PRESENT USAGE OF SONIC AND ULTRASONIC ENERGY. APPLICATIONS OF SONIC ENERGY TO PREPARATION AND EVALUATION OF HIGHWAY MATERIALS WERE STUDIED EXPERIMENTALLY. THE INVESTIGATION RESULTED IN' /1/ COMPLETION OF AN EXTENSIVE LITERATURE SURVEY, /2/ THE VIBRATORY COMPACTION OF HIGHWAY MATERIALS, ESPECIALLY SOILS, WAS STUDIED AS THE FIRST POTENTIAL AREA OF APPLICATION, /3/ PRELIMINARY APPLICATION TESTS WERE MADE WITH PIEZO-ELECTRIC AND AIR DRIVEN ROTATING BALL TRANSDUCERS, AND /4/ LIMITED TESTS WERE CONDUCTED ON MIXING AND COMPACTION OF OTHER HIGHWAY MATERIALS SUCH AS ASPHALTIC MIXTURES AND GRANULAR MATERIALS. IT WAS CONCLUDED THAT' /1/ SONIC ENERGY CAN PROVIDE POTENTIAL BENEFIT IN HIGHWAY CONSTRUCTION AND ENGINEERING, /2/ MORE FUNDAMENTAL KNOWLEDGE IS NEEDED ON THE DYNAMIC BEHAVIOR OF HIGHWAY MATERIALS AT LOW AND HIGH FREQUENCIES AND THEORETICAL AND EXPERIMENTAL WORK NEEDED IN AREAS OF VIBRATION OF NON-HOMOGENEOUS MEDIA LIKE SOILS AND CONCRETE, /3/ BASIC EFFORT SHOULD BE DEVOTED TO THE LOWER /AUDIO/ FREQUENCY RANGE FOR PROBLEMS SUCH AS COMPACTION OF COHESIVE MATERIALS, EXCAVATION AND CUTTING IN COHESIVE SOILS DRILLING, AND SIMILAR APPLICATIONS, /4/ DEVELOPMENT IS NEEDED OF RUGGEDIZED TRANSDUCERS, FEED-BACK-CONTROLLED POWER SUPPLIES, AND TRANSDUCER SYSTEMS OPERABLE FROM FIXED FREQUENCY ROTATING MOTOR-GENERATOR SETS.
Supplemental Notes: Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. No 25, 48 PP, 40 FIG, 11 TAB, 12 REF, PROJ NO 10-7
Authors: Moavenzadeh, FMcMaster, R CPublication Date: 1966
Serial: Media Type: Digital/other
TRT Terms: Old TRIS Terms: Subject Areas: Construction; Energy; Highways; Research; Vehicles and Equipment
Files: TRIS, TRB, ATRI
Created Date: Nov 18 2002 12:00AM
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