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Implementation of an Automated Test Setup for Measuring Electrical Conductance of Concrete.
| 题名： | Implementation of an Automated Test Setup for Measuring Electrical Conductance of Concrete. |
| 作者： | hoppe, e. j. lundy, l. j. schinkel, t. j. |
| 关键词： | permeability, chlorides, measurement, cylinders, monitoring, shunt resistor, test methods, automated testing, cost savings, implementation |
| 摘要： | This project was designed to provide the Virginia Department of Transportation (VDOT) with an automated laboratory setup for performing the rapid chloride permeability test (RCPT) to measure the electrical conductance of concrete in accordance with applicable standards. As an increasing number of construction projects is becoming subject to concrete permeability acceptance testing, there is a growing need for conducting laboratory RCPT in a timely and expedient manner. Typically, concrete cylinders arrive at VDOT's materials laboratory in large batches, sometimes more than 100 units at a time. This often results in backlogs in processing and leads to considerable delays. The lack of commercially available test equipment created a need to develop an automated device that could expedite large scale production testing. The Virginia Transportation Research Council was contacted to provide technical assistance. This report describes the practical implementation of a workable RCPT device. An automated laboratory setup for conducting RCPTs was developed and implemented at VDOT. The microprocessor-controlled device is capable of unattended measurement and monitoring of up to 32 concrete specimens at a time in accordance with AASHTO and ASTM test methods. The device is based on the Campbell Scientific CR10X Datalogger interfaced with the Campbell Scientific AM16/32 Multiplexer. Date- and time-stamped test records are stored electronically in ASCII format. / NOTE: Final rept. Aug-Dec 06. / Supplementary Notes: Sponsored by Federal Highway Administration, Richmond, VA. Virginia Div. and Virginia Dept. of Transportation, Richmond. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0712；13p |
| 报告类型： | 科技报告 |
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