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Discussion Comparative Evaluation Of Geotextile Pore Sizes Using Bubble Point Test And Image Analysis By Aydilek A H Dhondt D And Holtz Rd
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Book Synopsis Discussion "Comparative Evaluation of Geotextile Pore Sizes Using Bubble Point Test and Image Analysis" by Aydilek, A. H., D'Hondt, D., and Holtz, R.D. by : David J. Elton
Download or read book Discussion "Comparative Evaluation of Geotextile Pore Sizes Using Bubble Point Test and Image Analysis" by Aydilek, A. H., D'Hondt, D., and Holtz, R.D. written by David J. Elton and published by . This book was released on 2008 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geosynthetics written by Ian D. Peggs and published by ASTM International. This book was released on 1990 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirteen papers from the ASTM Symposium on Microstructure and Performance of Geosynthetics, held in Orlando, Florida, January 1989, on the effects of structural parameters of fibers, geotextiles, and geomembranes on the short and long term performance of finished geosynthetic products. Price to memb
Book Synopsis Comparative Evaluation of Geotextile Pore Sizes Using Bubble Point Test and Image Analysis by : AH. Aydilek
Download or read book Comparative Evaluation of Geotextile Pore Sizes Using Bubble Point Test and Image Analysis written by AH. Aydilek and published by . This book was released on 2007 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analysis of the filtration performance of a geotextile filter necessitates accurate information about the size distribution of geotextile pore openings. The effectiveness of the bubble point test in determining the pore and constriction sizes of geotextiles was evaluated. The characteristic woven geotextile pore and nonwoven geotextile constriction sizes, O95, were determined for a variety of specimens and compared with both the manufacturers' reported AOS values, and with those determined from the two previously developed image-based procedures and theoretical equations. The results indicated that the O95 sizes of woven mono and multifilament geotextiles determined by image analyses compared well with the AOS values, whereas the same observations were not made for the bubble point-based O95 sizes. The O95 constriction sizes of various nonwoven geotextiles obtained by the bubble point test were not comparable to the manufacturers' reported AOS values, indicating the limitation of ASTM D 4751 in determining constriction sizes. A direct method, such as image analysis, may be a better approach for determining the pore sizes of woven geotextiles, whereas the bubble point method should be preferred to determine constriction sizes in a nonwoven geotextile. Recommendations are made in regard to improvements in the current ASTM standard on bubble point testing.
Book Synopsis Evaluation of Woven Geotextile Pore Structure Parameters Using Image Analysis by : AH. Aydilek
Download or read book Evaluation of Woven Geotextile Pore Structure Parameters Using Image Analysis written by AH. Aydilek and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filtration performance of woven geotextiles is strongly related to their pore structure parameters, i.e., percent open area (POA) and pore-opening size distribution (PSD). Current methods of determination of pore structure parameters contain inherent disadvantages, whereas image analysis, taking advantage of the two-dimensional structure of woven geotextiles, can be used effectively for this purpose. Two new image-based PSD determination methods and a new image-based POA determination method were developed specifically for woven geotextiles and are presented in this paper. The POAs and two characteristic pore-opening sizes, O95 and O50, of various woven geotextiles were determined using the information provided by the image analysis methods. The image-based POAs and O95 pore-opening size of various geotextiles are comparable to those obtained from the physical measurements and the values reported by the manufacturers. On the other hand, the measured O50 pore-opening size is higher than the one determined using the analytical equations developed by two previous researchers.
Book Synopsis Evaluating Geotextile Pore Structure by : BR. Christopher
Download or read book Evaluating Geotextile Pore Structure written by BR. Christopher and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are many test methods available to determine the pore sizes of geotextile filters. Often overlooked is the fact that each method provides a different interpretation of a geotextile's pore structure. A survey of the available test methods, indicates that four categories of pores can be measured. Pore characteristics are identified by one of the following methodologies: sieving, theoretical, volumetric, and numerical. A critical review of the data produced by these methods shows that the actual pore structure as related to flow-through behavior can only be determined by the bubble point method, which provides a volumetric pore size. This test identifies the constriction size of each pore channel in a geotextile, where retention and clogging are most critical. The bubble point test method is advantageous because it provides for the complete pore size distribution of the geotextile, can be performed more efficiently than sieving methods, and provides an accurate estimate of the permeability of the geotextile.
Book Synopsis An Investigation of the Pore Size Distribution of Geotextiles and Other Materials by the Bubble Point Method by : Douglas P. D'Hondt
Download or read book An Investigation of the Pore Size Distribution of Geotextiles and Other Materials by the Bubble Point Method written by Douglas P. D'Hondt and published by . This book was released on 2005 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of the Bubble Point Method to the Characterization of the Pore-Size Distribution of Geotextiles by : SK. Bhatia
Download or read book Application of the Bubble Point Method to the Characterization of the Pore-Size Distribution of Geotextiles written by SK. Bhatia and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the design of a geotextile as a filter, reliable information about the pore-size distribution of the geotextile is needed. The bubble point method is one technique that is able to provide this information for a geotextile. The bubble point method is a simple and rapid technique for evaluating pore-size distributions of virgin, clogged, and stretched geotextiles. In addition, the bubble point equipment is also capable of providing information as to the degree of clogging within a geotextile and the permeability of a geotextile. The geotextile pore-size distribution results obtained by the bubble point method showed good repeatability. However, the bubble point method was only able to distinguish between geotextiles that had significantly different cross sections. Pore-size distribution results for geotextiles with similar cross sections, but of increasing thickness, were very similar. The dry sieving (ASTM D 4751), hydrodynamic sieving (CAN/CGSB-148.1-10), AND WET SIEVING (sw-640550-83) METHODS ARE GENERALLY only useful for evaluating the larger pore openings (O95, O90) of the geotextiles. In addition, the methods are time consuming. The mercury intrusion porosimetry method (ASTM D 4404) was also performed; however, there was little difference in pore-size distribution results for any of the 28 different geotextiles tested (Smith 1993). There are also environmental concerns with using mercury. The bubble point method showed potential for characterizing the pore-size distribution of geotextiles.
Book Synopsis Comparisons Between Geotextile Pore Sizes Obtained from Capillary Flow And Dry Sieving Tests by : Nuzhath Fatema
Download or read book Comparisons Between Geotextile Pore Sizes Obtained from Capillary Flow And Dry Sieving Tests written by Nuzhath Fatema and published by . This book was released on 2020 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the United States of America, two standard methods of measuring the largest pore size of a geotextile have been accepted: Dry Sieving Test (ASTM D4751, Standard Test Methods for Determining Apparent Opening Size of a Geotextile ) and Capillary Flow Test (ASTM D6767, Standard Test Method for Pore Size Characteristics of Geotextiles by Capillary Flow Test ). Despite several drawbacks of Dry Sieving Tests, such as the amount of time required; tendency of glass beads to become trapped, including trapping of glass beads inside the geotextiles; likelihood of imprecise preparation of glass beads; and potential electrostatic effects, the largest pore size (apparent opening size [AOS], O 95 ) results obtained from Dry Sieving Test still determines many filtration criteria. Although the Capillary Flow Test was approved in 2002, it is still not widely adopted, despite the fact that it provides the largest pore size (Bubble Point, O 98 ) and a complete pore size distribution of a geotextile. Decades of analyses searched for a correlation between the Dry Sieving and Capillary Flow Test results; however, none of them have been widely accepted because of the limited number of geotextiles used and a lack of proper calibration. The current study investigates a possible correlation between the Dry Sieving and Capillary Flow Test results with 51 woven, nonwoven, and composite geotextiles. The Capillary Flow Porometer was calibrated using four thin metal plates with known pore openings and two membranes. This study describes the challenges experienced during the Capillary Flow Test and factors affecting the test results. One finding is that the cleaning of calibration materials and equipment with Methanol plays an important role in the Capillary Flow Test results. The use of different shape factors, contact angles, and wetting liquids in the analyses are also considered. The outliers of Capillary Flow Test results were removed from the analysis using a box plot and whisker diagram, and a good correlation between AOS and Bubble Point ( R 2 =0.78) was established.
