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Potential Uses of Sonic and Ultrasonic Devices in Highway Construction

出版	Highway Research Board, Division of Engineering, National Research Council National Academy of Sciences-National Academy of Engineering, 1966
URL	http://books.google.com.hk/books?id=KLXUn6KmsF8C&hl=&source=gbs_api

註釋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.