geotextile Articles

  • Geotextiles in Construction Dewatering

    Woven geotextiles work wonders in dewatering applications as wraps around well screens and sump pit screens. The textile can be sewn into sleeves or tubes to be slid over the well screen or sump pit framework. This technique allows the user to compensate for well screens with slots that are too large or for sump pit piping with large perforations. By adding the geotextile sleeves the user ...


    By Griffin Dewatering

  • Case study - dredging with geotextiles

    Location: Poland Year: 2012 Context: Martime works - Filling up geotextiles / geotubes Our Solution: Dragflow pump connected to an hydraulic excavator. High efficiency and solid concentration. The best choice to fill-up ...


    By Dragflow North America

  • Guide to Better Geotextile Specifying

    Need Help Writing Geotextile Specs? Poorly written geotextile specifications are creating a host of problems: loss of valuable time, increased cost, lost revenue and in some instances, endangering lives. US Fabrics has interpreted hundreds of thousands of geotextile specifications. Our free guide will provide assistance for creating well written geotextile specs. In this ...


    By US Fabrics Inc

  • Pore Size Distribution of Nonwoven Geotextiles

    The applicability of the mercury intrusion technique to determine the pore size distribution (PSD) of geotextiles was evaluated. The method was found to be simple and rapid, and an ASTM standard for soils and rocks already exists (ASTM Test Method for Determination of the Pore Volume and Pore Volume Distribution of Soil and Rock by Mercury Intrusion Porosimetry [D 4404]). The PSD determined from ...


    By ASTM International

  • Effect of Dissolved Oxygen (and Bubbles) on the Measured Permittivity of Geotextiles

    Measurements are made of the permittivity in a heat set, nonwoven staple filament polypropylene as a function of the dissolved oxygen content (DOC) of the water. Vacuum deairing of the water to a DOC of 5 ppm or below insures that the measured permittivity will not be lowered by oxygen effects. Careful long-term measurements show that the measured permittivity is reduced very significantly if the ...


    By ASTM International

  • Filtration Opening Size of Geotextiles by Hydrodynamic Sieving

    The latest development on the hydrodynamic sieving technique (HST) using glass beads to determine the filtration opening size (FOS) of geotextiles is presented. The FOS value is defined as the 95% (by mass) diameter of the glass beads which have passed through the geotextile under the hydrodynamic sieving action. The data of an experimental program to verify the repeatability and reproducibility ...


    By ASTM International

  • Geotex® Geotextiles: A Life Cycle Costing Approach to Roads

    Subgrade contamination is the leading cause of failure in both pavements and unpaved roads. Aggregate layers used to support the traffic or pavement typically rests on a subgrade of sand, silt or clay. Without permanent separation, two factors will undoubtedly lead to the contamination of the aggregate layers—fine-grained soils will enter into the voids of the aggregate, preventing it from ...

  • Long-Term Filtration Behaviour of Soil-Geotextile System

    In addition to soil retention and permeability requirements for a geotextile filter, a geotextile should be able to function without having a significant number of its openings clogged. In order to evaluate the long-term filtration behaviour of a soil-geotextile system, a permeameter is developed in which both the long-term flow rates as well as the gradient ratio tests can be conducted ...


    By ASTM International

  • Effects of Back Pressure on Geotextile Transmissivity Tests

    To evaluate the effects of back pressure on the measurements of geotextile in-plane transmissivity, a new test device has been developed. A series of transmissivity tests were performed under back pressures ranging from 6.9 to 414 kPa. Results show that the influence of back pressure is significantly less than that caused by the variability among different specimens. However, to obtain repeatable ...


    By ASTM International

  • Cylindrical Expansion Test for Tensile Properties of Geotextiles

    This technical note describes a new apparatus and testing procedure to perform rapid quality control and assessment of the design parameters of geosynthetic materials. The cylindrical expansion test (CET) is based on the principles of the extension of a geosynthetic specimen wrapped around the surface of an expanding thin-wall cylinder. The parametric study conducted on two nonwoven polyolefin ...


    By ASTM International

  • CoirGreen™ Geotextiles - An Effective Soil Erosion Prevention Method

    “The different coir types and their characteristics have made coir the most versatile natural fiber ...


    By CoirGreen

  • Using Coir Geotextiles for soil erosion control

    One of the most effective and yet natural soil erosion prevention techniques is the use of Coir Geotextiles fabrics ( Woven Geotextiles). Used extensively to prevent environmental degradation Geotextiles have no synthetic material but is instead made out of an organic fiber, coir, which is extracted from the husk of a coconut. It is strong, durable, water proof and is one of the few natural ...


    By CoirGreen

  • Measuring Inherent Load-Extension Properties of Geotextiles for Design of Reinforced Structures

    Existing test methods for measuring the load-extension properties, including the stiffness and the ultimate strength, of geotextiles as they are subjected to confining pressures are reviewed and critically evaluated. In addition, a new test method which surmounts the drawbacks of the existing methods is presented. The new method has three distinct characteristics: (1) it is an “element” test, ...


    By ASTM International

  • Application of the Bubble Point Method to the Characterization of the Pore-Size Distribution of Geotextiles

    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 ...


    By ASTM International

  • A Thickness Equation for Nonwoven, Needle-Punched Geotextiles under Normal Loading

    An equation to predict the thickness of nonwoven, needle-punched geotextiles under normal compressive loading is proposed. The equation is t=(t0-t8)e-as+t8 in which, t0 is the initial thickness, t8 is a limiting thickness, s is the normal stress, and a is an empirical coefficient. Comparison with thickness data obtained in multiple tests on eight different geotextiles using an in-plane, radial ...


    By ASTM International

  • Treatment of domestic greywater by geotextile filter and intermittent sand filtration bioreactor

    Intermittent sand filtration (ISF) is an efficient system for treatment of greywater; however, the high quality of effluent and the simple set-up contrast with the high failure rate due to clogging of surface layers. The efficacy of several polypropylene non-woven geotextiles (apparent opening size from 0.10 to 0.18 mm) used as primary treatment filters to remove suspended particles from ...


    By IWA Publishing

  • Dewatering with Geotextile Bags - South Gippsland, Australia (Water Treatment) - Case Study

    A simple, cost effective new method of dewatering sludge is now available in Australia, writes Bill Kelly from CRS Industrial Water Treatment. The use of geotextilcs for containment and dewatering came about as a result of a major flood event in Holland in the 1950s. It prompted Dutch marine engineers to seek new methods and materials to build structures for coastal defences. The ...

  • Rainstore3 Installation Instructions For Stormwater Drainage Detention & Retention with Geotextile Fabric

    This document describes how to properly install the Rainstore3 water storage system with geotextile fabric for stormwater drainage detention and retention. Detention allows for short-term storage and release of storm water through outlet pipes. Nearby water treatment plants may have a limited capacity for handling storm water and thus, stormwater needs to be temporarily detained on site. ...


    By Invisible Structures, Inc.

  • The Role of Jute Geotextile/Slurry Interface Friction on the Bearing Capacity of Clay Slurry

    The layered clay-sand scheme of land reclamation depends on the successful formation of sand seams sandwiched between hydraulically placed layers of marine clay slurry to provide shorter drainage paths for rapid clay consolidation during surcharge application. It is anticipated that a low-cost jute geotextile placed on a clay slurry surface without anchorage will expedite construction of sand ...


    By ASTM International

  • Further developments in self-fertilising geotextiles for use in pervious pavements

    Geotextiles incorporating inorganic nutrients (particularly phosphorous) to enhance the growth of oil degrading microoganisms when geotextiles are used in pervious pavement applications have been shown to be effective in the past. However the cost and manufacturing difficulties have been a barrier to their use. A polypropylene random mat geotextile incorporating an alternative polymer additive as ...


    By IWA Publishing

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