ASTM D8203-18 pdf free

04-12-2021 comment

ASTM D8203-18 pdf free.Standard Test Method for Determination of the Horizontal Water Flow Rate of a Geosynthetic Screening Material, Product,or Device.
This test method covers test procedures for determiningthe horizontal water flow rate through a geosynthetic orgeosynthetic-enhanced screening device,such as a sedimentretention device (SRD), under a constanthead pressure.Thetest is conducted with potable water.
This test is intended to be used for quality control andproduct development efforts,but should not be considered aperformance test.
The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation purposes only.
This standard does not purport to address all of thesafety concerns,if any,associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.For definitions of common technical terms used in thisstandard, refer to Terminology D4439.
Definitions of Terms Specific to This Standard:geosynthetic screening device, n—geosynthetic orgeosynthetic-enhanced materials,products,or devices thatprimarily provide the screening function,such as a sedimentretention device (SRD). screening—a geosynthetic, placed across the path of aflowing fluid (ground water,surface water,wind),carryingparticles in suspension,provides screening when it retainssome or all fine soil particles while allowing the fluid to passthrough. After some period of time,particles accumulateagainst the screen,which requires that the screen be able towithstand pressures generated by the accumulated particles andthe increasing pressure from accumulated fluid. (See GuideD5819.)
sediment retention device (SRD), n—a material,product,or device designed to intercept sediment-laden flow,screening out suspended solids and reducing the velocity of theflow, causing transported sediments to settle out. Typical SRDsinclude silt fences,as well as natural or manmade materialsencapsulated in geosynthetic fabrics, meshes, or nettings suchas wattles,filter logs,fiber filtration tubes,fiber rolls,andcompost socks.
A test specimen is positioned vertically across the mouthof a”box”reservoir, and potable water is introduced upstreamand maintained at a predetermined constant head as the wateris allowed to seep through the specimen. Once a steadystateflow condition is established,a discharge volume and theassociated time are measured.ASTM D8203 pdf download.

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