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Abstract

This paper describes the use of an Apple IIe microcomputer and a CIL Microsystems PCI 6380 Z80-based microcomputer interface to monitor a series of geotextile dynamic filtration experiments.

The aim of the experiments is to find a suitable geotextile fabric which, when placed between a road stone sub-base and a clay subgrade will act as a filter by preventing clay contamination upwards into the stone sub-base materials while still allowing water drainage to occur.

The experiments are performed on a Mand servo-hyraulic dynamic testing system monitoring such variables as cyclic load, deflection, porewater pressure dissipation and the number of cycles. These were previously monitored using an Ultra-Violet recorder but this had disadvantages, such as the traces due to the cyclic load were difficult to interpret accurately and the data had to be redigitized, processed and presented manually.

The new monitoring system involves the Apple microcomputer and the PCI 6380 interface. Interactive software has been produced to capture data at predetermined intervals, store it in the PCI 6380's local RAM, send it to the microcomputer when the scan is complete, process it and then store it on floppy disk. Software has also been produced to analyse and display the data in graphic form, tabular form or both.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 2/3 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON CIVIL AND STRUCTURAL ENGINEERING COMPUTING Edited by: B.H.V. Topping Paper XXVIII.6 Microcomputer Controlled Dynamic Testing of Geotextile Separating Membranes in Road Construction C. Davis, S.R Cochrane and A. Thompson Department of Civil Engineering, The Queen's University of Belfast doi:10.4203/ccp.2.28.6 purchase the full-text of this paper Full Bibliographic Reference for this paper C. Davis, S.R Cochrane, A. Thompson, "Microcomputer Controlled Dynamic Testing of Geotextile Separating Membranes in Road Construction", in B.H.V. Topping, (Editor), "Proceedings of the Second International Conference on Civil and Structural Engineering Computing", Civil-Comp Press, Edinburgh, UK, pp 377-380, 1985. doi:10.4203/ccp.2.28.6 Abstract This paper describes the use of an Apple IIe microcomputer and a CIL Microsystems PCI 6380 Z80-based microcomputer interface to monitor a series of geotextile dynamic filtration experiments. The aim of the experiments is to find a suitable geotextile fabric which, when placed between a road stone sub-base and a clay subgrade will act as a filter by preventing clay contamination upwards into the stone sub-base materials while still allowing water drainage to occur. The experiments are performed on a Mand servo-hyraulic dynamic testing system monitoring such variables as cyclic load, deflection, porewater pressure dissipation and the number of cycles. These were previously monitored using an Ultra-Violet recorder but this had disadvantages, such as the traces due to the cyclic load were difficult to interpret accurately and the data had to be redigitized, processed and presented manually. The new monitoring system involves the Apple microcomputer and the PCI 6380 interface. Interactive software has been produced to capture data at predetermined intervals, store it in the PCI 6380's local RAM, send it to the microcomputer when the scan is complete, process it and then store it on floppy disk. Software has also been produced to analyse and display the data in graphic form, tabular form or both. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £90 +P&P)
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