geotextile Articles

  • 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

  • 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

  • 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

  • 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

  • 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

  • Laboratory Properties of a Soft Marine Clay Reinforced with Woven and Nonwoven Geotextiles

    This paper is concerned with the laboratory properties of a geotextile-reinforced compacted soft marine deposit with respect to its compaction, compressive strength, and time-dependent settlement characteristics. Two different geotextiles, namely, Polyfelt TS-500 (nonwoven) and Cardon SG PP 150 (woven) have been investigated. It was observed from the experimental study that a nonwoven geotextile ...


    By ASTM International

  • Equipping a once-fatal highway to deliver solid future performance

    Background Stretching 1189 miles along the southeastern coast from Virginia to Florida, the Ocean Highway (US 17) mixes magnifi cent scenery with unpredictable driving conditions. In 2005, the South Carolina Department of Transportation (SCDOT) called its 211-mile stretch of US 17 one of the deadliest roads in the nation; and between 1997 and 2005, the highway experienced nearly 1,000 ...


    By Thrace Plastics Pack S.A.

  • 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

  • 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

  • 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

  • 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

  • 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 ...

  • Geotex® 200ST Fabric brings smooth travel to remote road case study

    Willow Creek Road is a 36-mile stretch of un-paved road. Cattle ranchers, vacationers and hunters use the road, but during wet weather it became a muddy, hazardous mess. The soil is a silty clay, and earlier attempts to use just gravel were less than successful. In addition, the nearest gravel pit is a three-hour drive, so Valley County Road Superintendent Wayne Waarvik knew he had to do more ...

  • Monmouthshire Canal

    Terram Preserves Popular Canal As part of the reinforcement of the Monmouthshire and Brecon canal in South Wales, engineers have specified Terram’s specialist geotextiles and cellular Erocell systems to prevent erosion on a section of the waterway. The canal is a popular tourist attraction and engineers at British Waterways sought to stabilise the banks to preserve the ...

  • 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

  • In-Plane Air Flow Through Needle-Punched, Nonwoven Geotextiles Under Normal Loading

    Knowledge of the in-plane permeability of nonwoven geotextiles to air and other gases has important applications including, for example, the transport and collection of methane gas beneath landfill caps. The results of in-plane flow measurements of air through eight different needle-punched, nonwoven geotextiles are presented. Air flow was measured using a radial flow device under a range of ...


    By ASTM International

  • Stream restoration and slope stabilization project case study

    ‘Gerber Legendary Blades’, a division of Fiskars, is a manufacturer of jack-knives for outdoors enthusiasts. The Gerber corporate headquarters was built in the late 1970’s near Portland, Oregon. The parking lot was built an adequate distance from the stream running through the property, and paved with asphalt. In the late 90’s, continued development of impervious surfaces ...


    By Envirolok LLC

  • Millstone Manor Parking Lot Stabilization - Case Study

    Shallow utilities won’t get in the way of our high strength woven geotextile’s ability to stabilize this parking lot. Millstone Manor, an apartment complex located right next to the Ogden River at the base of the Wasatch Mountains, had been having difficulty stabilizing their parking areas for years. Due to its proximity to a water source and resulting soil types, the CBR ...


    By Nilex

  • Geotechnical Properties of Expanded Shale Lightweight Aggregate

    In recent years lightweight aggregates are being used increasingly in geotechnical applications. This paper presents results of large-size one-dimensional compression and direct shear tests performed on lightweight aggregate. The compressibility and shear strength characteristics of the lightweight aggregate are compared with those of normal-weight aggregate using the same experimental setup. ...


    By ASTM International

  • Bus station wellingholzhausen, Germany case study

    Use of Combigrid under the bearing layer The old bus station in front of the school in Wellingholzhausen, Germany needed to undergo repair. The very weak subsoil caused to the growing traffic settlements in several areas. Additionally the subsoil and the bearing layer had an insufficient filter stability, which caused an intermixing of the soils and a reduction of the frost resistance ...


    By NAUE GmbH & Co.KG

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