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DEVELOPMENT AND TESTING OF A SEISMIC PAVEMENT ANALYZER.
| 题名： | DEVELOPMENT AND TESTING OF A SEISMIC PAVEMENT ANALYZER. |
| 作者： | Nazarian-S; Baker-MR; Crain-K |
| 关键词： | TESTING-; PAVEMENT-ANALYZER; SEISMIC-RESPONSE; MEASURING-INSTRUMENTS; VOIDS-; RIGID-PAVEMENTS; MOISTURE-; ASPHALTIC-CONCRETE; PAVEMENT-CRACKING; DELAMINATION-; OVERLAY-COURSE; AGING-; WAVE-PROPAGATION; PAVEMENT-CONDITION; PAVEMENT-DISTRESS; STRATEGIC-HIGHWAY-RESEARCH-PROGRAM |
| 摘要： | The Seismic Pavement Analyzer (SPA) is an instrument designed and constructed to monitor conditions associated with pavement deterioration. It measures voids or loss of support under a rigid pavement, moisture infiltration in asphalt concrete pavement, fine cracking in pavements delamination of overlays, and aging of asphalt. The SPA detects these pavement conditions by estimating Young's and shear moduli from the following wave propagation measurements: impact echo; impulse response; spectral analysis of surface waves; ultrasonic surface waves; and ultrasonic body wave velocity. The SPA records the pavement response produced by high- and low-frequency pneumatic hammers on 5 accelerometers and 3 geophones. A computer controls data acquisition, instrument control, and interpretation; measurements and interpretations are reported in both screen and database formats. This report describes the device and summarizes the usefulness of the equipment in maintenance activities. The operation of the SPA to determine different types of distress precursors is briefly illustrated. This report discusses results from several field tests. The specifications and design of different components of the device and a manual of operation are presented in a companion report. |
| 总页数： | 1993/12. pp165 (Figs., Tabs., Refs., 3 App.) |
| 报告类型： | 科技报告 |
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