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ASTM D4354-12(R2020) pdf free download

ASTM D4354-12(R2020) pdf free download.Standard Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
1. Scope
1.1 This practice covers three procedures for the sampling of geosynthetics and rolled erosion control products (RECPs) for testing. This practice requires that instructions on taking laboratory samples and test specimens be part of every test method for geosynthetics. 1.1.1 The first procedure describes the sampling of produc- tion units for the purpose of manufacturer’s quality control (MQC) (Table 1). 1.1.2 The second procedure describes the sampling of production units for the purpose of manufacturer’s quality assurance (MQA) testing during the manufacturing process. This requires that backup statistical process control records be maintained during the manufacturing process (Table 2). 1.1.3 The third procedure describes the division of ship- ments ofgeosynthetics and rolled erosion control products into lots and the determination of lot sample size for purchaser’s specification conformance testing (Table 3). 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions: 3.1.1 geosynthetic, n—a planar product manufactured from polymeric material used with soil, rock, earth, or other geo- technical engineering related material as an integral part of a man-made project, structure, or system. 3.1.2 lot, n—a unit of production, or a group of other units or packages, taken for sampling or statistical examination, having one or more common properties and being readily separable from other similar units. 3.1.3 quality assurance, n—all those planned or systematic actions necessary to provide adequate confidence that a material, product, system, or service will satisfy given needs. 3.1.4 quality control, n—the operational techniques and the activities which sustain a quality of material, product, system, or service that will satisfy given needs; also the use of such techniques and activities. 3.1.5 sample, n—(1) a portion ofmaterial which is taken for testing or for record purposes. (See also sample, lot; sample, laboratory; and specimen.) (2) a group ofspecimens used, or of observations made, which provide information that can be used for making statistical inferences about the population(s) from which the specimens are drawn. 3.1.6 sample, laboratory, n—a portion of material taken to represent the lot sample, or the original material, and used in the laboratory as a source of test specimens. 3.1.7 sample, lot, n—one or more shipping units taken at random to represent an acceptance sampling lot and used as a source of laboratory samples. 3.1.8 sampling unit, n—an identifiable, discrete unit or subunit of material that could be taken as part of a sample. Discussion—Fig. 1 is included to show the differ- ence between lot sample, laboratory sample, and test speci- men.
3.1.9 sampling unit, primary, n—the sampling unit contain- ing all the sources of variability which should be considered in acceptance testing; the sampling unit taken in first stage of selection in any procedure for sampling a lot or shipment. Discussion—For textiles, the primary sampling units are generally taken as the shipping units making up a lot, such as bales of fiber, cases of yarn, rolls of fabric, or cartons of garments or other finished products. Adequate sampling for acceptance testing requires taking into account not only the variability between primary sampling units but also the vari- ability between subunits within primary sampling units and between specimens from a single subunit in a primary sam- pling unit. 3.1.10 specimen, n—a specific portion of a material or laboratory sample upon which a test is performed or which is taken for that purpose. (Syn. test specimen.) 3.1.11 test result, n—a value obtained by applying a given test method, expressed either as a single observation or a specified combination of a number of observations. Discussion—A test result is the value reported for a single subunit of the laboratory sample. For different test methods a test result might be (1) the value of a single observation (such as a measurement of a property, a count of defects, or a grading or rating) on a single specimen from a single subunit of the laboratory sample; (2) the average or some other function of the values for single observations on each of n specimens from a single subunit of the laboratory sample; or (3) a ratio of successes to total observations for n specimens from a single subunit of the laboratory sample. 3.1.12 For definitions of other textile terms used in this practice, refer to Terminology D123. 3.1.13 For definitions of other geosynthetic terms used in this practice, refer to Terminology D4439.

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