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Determination And Comparisons Of The Pore Structure Of Nonwoven Geotextiles
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Book Synopsis Determination and Comparisons of the Pore Structure of Nonwoven Geotextiles by : AM. Elsharief
Download or read book Determination and Comparisons of the Pore Structure of Nonwoven Geotextiles written by AM. Elsharief and published by . This book was released on 1996 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microstructural properties of 14 nonwoven geotextiles obtained from 4 manufacturers were measured using mercury intrusion porosimetry (MIP) and image analysis. Different testing techniques were attempted and evaluated for the two methods. The controlled volume MIP option was found to suit geotextiles more than the pressure table option. For image analysis a one dimensional model was used to measure the pore size distribution from enlarged photographic prints of thin sections. The results from the two methods indicated similar pore size distribution for geotextiles from the same manufacturer with thickness being the major difference. However, significant differences in porosity and specific surface area between different geotextile manufacturers were obtained. The O95values obtained from image analysis and MIP were found to be much higher than the apparent opening size (AOS) and the filtration opening size (FOS) for the same geotextile.
Book Synopsis Recent Developments in Geotextile Filters and Prefabricated Drainage Geocomposites by : Shobha Krishna Bhatia
Download or read book Recent Developments in Geotextile Filters and Prefabricated Drainage Geocomposites written by Shobha Krishna Bhatia and published by ASTM International. This book was released on 1996 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides information on woven and non-woven geotextiles used for filtering and drainage in geotechnical engineering. The design of such filters balances large pores for adequate permeability with smaller pores for proper soil retention. Of the 15 papers from a June 1995 symposium in Denver, Colorado
Book Synopsis ASTM Special Technical Publication by :
Download or read book ASTM Special Technical Publication written by and published by . This book was released on 1990 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Geotextiles written by Amit Rawal and published by CRC Press. This book was released on 2010-10-06 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The monograph critically reviews most commonly used geotextile structures, their properties and performance characteristics. In general, both natural and synthetic fibres are used for the production of geotextiles, and the advantages and disadvantages of each type of fibre are discussed for various applications of geotextiles. The important functio
Book Synopsis Determination of the Pore Size Distribution of Nonwoven Geotextiles by a Modified Capillary Flow Porometry Technique by : J. Mlynarek
Download or read book Determination of the Pore Size Distribution of Nonwoven Geotextiles by a Modified Capillary Flow Porometry Technique written by J. Mlynarek and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The capillary flow porometry(CFP)technique, known as the bubble point method, has been applied to measure the entire pore size distribution (PSD)of nonwoven geotextiles.
Download or read book Textile Technology Digest written by and published by . This book was released on 2002 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Geotextile Structure on Pore Size Determination by : JM. Rigo
Download or read book Influence of Geotextile Structure on Pore Size Determination written by JM. Rigo and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filtration performance of a geotextile is related to its capacity to retain soil particles over time without clogging. A pore size determination such as the filtration opening size (FOS) is used to assess the geotextile's filtration behavior. Standard hydrodynamic methods use a soil with a uniformity coefficient (Cu) greater than 6, with the coarser particle size value at least twice the estimated FOS value, and with a d10 four times smaller than the FOS value. The filtration opening size determination, using such a soil, is greatly influenced by the size of the coarser particles and by their fraction. Pore size has been overestimated because of these factors and because of the curve continuity. The soil nature of the gradation curve and the quantity of soil used in the test may distort pore size determination, hide some phenomena, and lead to errors in interpretation.
Book Synopsis Geotextiles, Geomembranes, and Related Products: Steep slopes and walls. Embankments on soft soil. Roads and railroads. Filtration and drainage. Erosion control by : G. den Hoedt
Download or read book Geotextiles, Geomembranes, and Related Products: Steep slopes and walls. Embankments on soft soil. Roads and railroads. Filtration and drainage. Erosion control written by G. den Hoedt and published by CRC Press. This book was released on 1990 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1990. Routledge is an imprint of Taylor & Francis, an informa company.
Book Synopsis Handbook of Nonwovens by : S. J. Russell
Download or read book Handbook of Nonwovens written by S. J. Russell and published by Woodhead Publishing. This book was released on 2006-12-22 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonwovens are a unique class of textile material formed from fibres that are bonded together through various means to form a coherent structure. Given their rapid industrial development and diverse markets, understanding and developing nonwovens is becoming increasingly important. With its distinguished editor and array of international contributors, the Handbook of nonwovens, offers a comprehensive review of the latest advances in this area and how they can be applied to particular products. Initial chapters review the development of the industry and the different classes of nonwoven material. The book then discusses methods of manufacture such as dry-laid, wet-laid and polymer-laid web formation. Other techniques analysed include mechanical, thermal and chemical bonding as well as chemical and mechanical finishing systems. The book concludes by assessing the characterisation, testing and modelling of nonwoven materials. Handbook of nonwovens is a valuable reference for those involved in the manufacturing and use of nonwoven products in such areas as; transport, medicine, hygiene and various branches of engineering. Provides a comprehensive review of the latest advances in this important area Written by leading experts in the field Discusses different methods of manufacture, bonding and finishing
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 Filtration Performance of Geotextile-wastewater Treatment Sludge Systems by : Ahmet Halit Aydilek
Download or read book Filtration Performance of Geotextile-wastewater Treatment Sludge Systems written by Ahmet Halit Aydilek and published by . This book was released on 2000 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Hydraulic Classification of Unsaturated Nonwoven Geotextiles for Use in Soil Structures by : Christopher Bondi Pickles
Download or read book Hydraulic Classification of Unsaturated Nonwoven Geotextiles for Use in Soil Structures written by Christopher Bondi Pickles and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the great success of geosynthetics and the ever increasing variety of available products, classification of the polymeric materials has fallen behind their numerous applications and wide use in practice. The behavior of nonwoven geotextiles while in unsaturated conditions is one example of an area where information is lacking. Geotextiles are often incorporated in engineered structures including landfill liners and covers, earthen dams, retaining walls, and roads to perform the separation, filtration, and/or drainage functions. Although the materials perform well when saturated, this condition is often not realistic in many of these systems. Moreover, under unsaturated conditions, a capillary break will often form at the interface between the soil and geotextile. If a capillary break is unaccounted for in a system design, the resulting build-up of moisture may have negative effects on the performance of the structure. Properly designed geotextile capillary barriers, on the other hand, have the potential for many positive applications. In order to understand the hydraulic behavior of geotextiles under unsaturated conditions, several methods used to determine the geotextile water retention curve were evaluated in this study. Two different test setups, the modified capillary rise and the modified hanging column, where then constructed and used to study the retention function of geotextiles in the in-plane and cross-plane directions, respectively. Based on the properties of the geotextiles and a fine grained soil used in this study, predictions were made about the formation of a capillary break in the soil-geotextile system. Eight small column tests where then conducted to simulate a capillary barrier, measure its storage, and verify the experimental predictions involving the geotextile water retention curve. The testing program provided insight to the unsaturated behavior of nonwoven geotextiles and the materials ability to impede moisture flow in unsaturated conditions. Whether a result of differences in the testing methods used, surfactants applied during manufacturing, or anisotropy in geotextiles pore structure, the nonwoven geotextiles tested in this study experienced variations in air and water entry suctions when tested in the cross-plane versus the in-plane direction. Additionally, the four nonwoven geotextiles were found to experience increased air-entry suctions when fine grained soil was retained on and impregnated in the material or when subjected to a normal load. Thicker geotextiles were found to provide more resistance to impregnation with fines. Due to the low water entry suction of a nonwoven geotextile, when a geotextile and a fine grained soil are placed in contact with each other under unsaturated conditions, the interface of the two materials may create a capillary break that is capable of preventing moisture flow until the soil adjacent to the geotextile is nearly saturated. Furthermore, the small range of water-entry suctions found in geotextiles makes classification for performance based selection of different geotextiles in a capillary barrier system irrelevant, i.e the geotextiles are very similar and one geotextile does not seem to outperform another in a capillary barrier application.
Book Synopsis Geotextile Testing and the Design Engineer by : Joseph E. Fluet
Download or read book Geotextile Testing and the Design Engineer written by Joseph E. Fluet and published by ASTM International. This book was released on 1987 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication, Geotextile Testing and the Design Engineer, contains pa◆pers presented at the international symposium of the same name held in Los Angeles, California on 26 June 1985. The symposium was sponsored by ASTM Committee D-35 on Geotextiles, Geomembranes, and Related Prod◆ucts. Joseph E. Fluet, Jr., of GeoServices Inc. Consulting Engineers, presided as symposium chairman and was editor of this publication.
Download or read book Geosynthetics written by David I. Cook and published by iSmithers Rapra Publishing. This book was released on 2003 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geosynthetics often play critical roles in civil engineering and it is important that the materials in use can withstand the physical and chemical pressures of the environment. These range from resistance to leachates from landfill to resistance to root damage in soil liners, as well as standard properties such as resistance to creep, oxidation and UV light, and tensile strength. This Rapra Review Report discusses the polymers used in each category of geosynthetics, production methods, test methods and applications. The review is accompanied by around 400 abstracts from papers and books in the Rapra Polymer Library database, to facilitate further reading on this subject.
Book Synopsis Recent Advances in Polymer Nanocomposites: Synthesis and Characterisation by : Sabu Thomas
Download or read book Recent Advances in Polymer Nanocomposites: Synthesis and Characterisation written by Sabu Thomas and published by CRC Press. This book was released on 2010-08-03 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the current state of the art, new challenges, opportunities, and applications in the area of polymer nanocomposites. Special attention has been paid to the processing-morphology-structure-property relationship of the system. Various unresolved issues and new challenges in the field of polymer nanocompostes are discussed. The infl
