定价： 515元 加购物车

定价： 515元 加购物车

定价： 590元 加购物车

定价： 590元 加购物车

定价： 590元 加购物车

定价： 843元 加购物车

定价： 646元 加购物车

定价： 590元 加购物车

This specification covers the design and construction standards, material and physical requirements, and test methods for a smooth-tread standard tire for measuring tire-pavement friction forces. When tested with appropriate methods, the tread compounds shall conform to specified values of physical properties such as tensile sheet cure, 300 % modulus, specific gravity, tensile strength, elongation, and tire tread durometer performance.1.1 This specification covers the general requirements for a smooth-tread standard tire for measuring tire-pavement friction forces.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.1.3 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 加购物车

5.1 PCS is one of the very few techniques that are able to deal with the measurement of particle size distribution in the nano-size region. This guide highlights this light scattering technique, generally applicable in the particle size range from the sub-nm region until the onset of sedimentation in the sample. The PCS technique is usually applied to slurries or suspensions of solid material in a liquid carrier. It is a first principles method (that is, calibration in the standard understanding of this word, is not involved). The measurement is hydrodynamically based and therefore provides size information in the suspending medium (typically water). Thus the hydrodynamic diameter will almost certainly differ from other size diameters isolated by other techniques and users of the PCS technique need to be aware of the distinction of the various descriptors of particle diameter before making comparisons between techniques. Notwithstanding the preceding sentence, the technique is widely applied in industry and academia as both a research and development tool and as a QC method for the characterization of submicron systems.1.1 This guide deals with the measurement of particle size distribution of suspended particles, which are solely or predominantly sub-100 nm, using the photon correlation (PCS) technique. It does not provide a complete measurement methodology for any specific nanomaterial, but provides a general overview and guide as to the methodology that should be followed for good practice, along with potential pitfalls.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 加购物车

5.1 Particle size is a key property of manufactured or engineered nanoparticles used in a wide range of applications. For purposes relevant to evaluations of safety, effectiveness, performance, quality, public health impact, or regulatory status of products, the correct measurement and uniform reporting of size and related parameters under use conditions, or during the manufacturing process, are critical to suppliers, analysts, regulators and other stakeholders.5.2 This test method is intended principally for the analysis of nanoparticles in aqueous suspension with dimensions between about 1 nm and 100 nm, but may be applied to diffusive colloidal particles even if their dimensions fall outside the nanoscale range (up to 1000 nm).5.3 For more detailed guidance on DLS measurements, including operational aspects, refer to Appendix X2 of this test method.NOTE 1: The user is also referred to Guide E2490, which provides broad guidance for the application of DLS to nanomaterials. Guide E2490 is not required for the implementation of this test method.1.1 This test method addresses the determination of nanoparticle size (equivalent sphere hydrodynamic diameter) using batch-mode (off-line) dynamic light scattering (DLS) in aqueous suspensions and establishes general procedures that are applicable to many commercial DLS instruments. This test method specifies best practices, including sample preparation, performance verification, data analysis and interpretation, and reporting of results. The document includes additional general information for the analyst, such as recommended settings for specific media, potential interferences, and method limitations. Issues specific to the use of DLS data for regulatory submissions are addressed.1.2 The procedures and practices described in this test method, in principle, may be applied to any particles that exhibit Brownian motion and are kinetically stable during the course of a typical experimental time frame. In practice, this includes particles up to about 1000 nm in diameter, subject to limitations as described in the test method.1.3 This test method does not provide test specimen preparation procedures for all possible materials and applications, nor does it address synthesis or processing prior to sampling. The test specimen (suspension) preparation procedures should provide acceptable results for a wide range of materials and conditions. The analyst must validate the appropriateness for their particular application.1.4 This test method is applicable to DLS instruments that implement correlation spectroscopy. Analysts using instruments based on frequency analysis may still find useful information relevant to many aspects of the measurement process, including limits of applicability and best practices. On-line (flow-mode) DLS measurements are not treated here specifically and may have additional limitations or issues relative to batch-mode operation.1.5 Units—The values stated in SI units are to be regarded as standard. Where appropriate, c.g.s. units are given in addition to SI.1.6 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 843元 加购物车

4.1 The estimation of average particle size has two chief functions: (1) as a guide to the degree of fineness or coarseness of a powder as this, in turn, is related to the flow and packing properties, and (1) as a control test on the uniformity of a product.4.2 These test methods provide procedures for determining the envelope-specific surface area of powders, from which is calculated an “average” particle diameter, assuming the particles are monosize, smooth surface, nonporous, spherical particles. For this reason, values obtained by these test methods will be reported as an average particle size or Fisher Number. The degree of correlation between the results of these test methods and the quality of powders in use will vary with each particular application and has not been fully determined.4.3 These test methods are generally applicable to alumina and silica powders, for particles having diameters between 0.2 and 75 μm (MIC SAS) or between 0.5 and 50 μm (FSSS). They may be used for other similar ceramic powders, with caution as to their applicability. They should not be used for powders composed of particles whose shape is too far from equiaxed—that is, flakes or fibers. In these cases, it is permissible to use the test methods described only by agreement between the parties concerned. These test methods shall not be used for mixtures of different powders, nor for powders containing binders or lubricants. When the powder contains agglomerates, the measured surface area may be affected by the degree of agglomeration. Methods of de-agglomeration may be used if agreed upon between the parties concerned.4.4 When an “average” particle size of powders is determined using either the MIC SAS or the FSSS, it should be clearly kept in mind that this average size is derived from the determination of the specific surface area of the powder using a relationship that is true only for powders of uniform size and spherical shape. Thus, the results of these methods are only estimates of average particle size.1.1 These test methods cover the estimation of the average particle size in micrometres of alumina and silica powders using an air permeability method. The test methods are intended to apply to the testing of alumina and silica powders in the particle size range from 0.2 to 75 μm.1.2 The values stated in SI units are to be regarded as standard, with the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimetre (g/cm3) and gram (g) units is the long-standing industry practice; and the units for pressure, cm H2O—also long-standing practice.1.3 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 加购物车

5.1 Reported particle size measurement is a function of both the actual particle dimension and shape factor as well as the particular physical or chemical properties being measured. Caution is required when comparing data from instruments operating on different physical or chemical parameters or with different particle size measurement ranges. Sample acquisition, handling, and preparation can also affect reported particle size results.5.1.1 It is important to recognize that the results obtained by this test method, or any other method for particle size determination using different physical principles, may disagree. The results are strongly influenced by the physical principles employed by each method of particle size analysis. The results of any particle sizing method should be used only in a relative sense; they should not be regarded as absolute when comparing results obtained by other methods.5.2 Light scattering theory has been available for many years for use in the determination of particle size. Several manufacturers of testing equipment now have units based on these principles. Although each type of testing equipment uses the same basic principles for light scattering as a function of particle size, different assumptions pertinent to application of the theory, and different models for converting light measurements to particle size, may lead to different results for each instrument. Therefore, the use of this test method cannot guarantee directly comparable results from different types of instruments.5.3 Knowledge of the particle size distribution of metal powders is useful in predicting the powder-processing behavior and ultimate performance of powder metallurgy parts. Particle size distribution is related closely to the flowability, moldability, compressibility, and die-filling characteristics of a powder, as well as to the final structure and properties of finished powder metallurgy (P/M) parts.5.4 This test method is useful to both suppliers and users of powders in determining the particle size distributions for product specifications, manufacturing control, development, and research.5.5 This test method may be used to obtain data for comparison between lots of the same material or for establishing conformance, as in acceptance testing.1.1 This test method covers the determination of the particle size distribution by light scattering, reported as volume percent, of particulate materials including metals and compounds.1.2 This test method applies to analyses with both aqueous and nonaqueous dispersions. In addition, analysis can be performed with a gaseous dispersion for materials that are hygroscopic or react with a liquid carrier.1.3 This test method is applicable to the measurement of particulate materials in the range of 0.4 to 2000 μm, or a subset of that range, as applicable to the particle size distribution being measured.1.4 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.5 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 加购物车

4.1 It is important to recognize that the results obtained by this method or any other method for particle size distribution utilizing different physical principles may disagree. The results are strongly influenced by the physical principles employed by each method of particle size analysis. The results of any particle sizing method should be used only in a relative sense, and should not be regarded as absolute when comparing results obtained by other methods.4.2 Light scattering theory that is used for determination of particle size has been available for many years. Several manufacturers of testing equipment have units based on these principles. Although each type of testing equipment utilizes the same basic principles for light scattering as a function of particle size, different assumptions pertinent to applications of the theory and different models for converting light measurements to particle size may lead to different results for each instrument. Therefore, the use of this test method cannot guarantee directly comparable results from the various manufacturers' instruments.4.3 Manufacturers and purchasers of alumina and quartz will find the method useful to determine particle size distributions for materials specifications, manufacturing control, and research and development.1.1 This test method covers the determination of particle size distribution of alumina or quartz using laser light-scattering instrumentation in the range from 0.1 to 500 μm.1.2 The procedure described in this test method may be applied to other nonplastic ceramic powders. It is at the discretion of the user to determine the method's applicability.1.3 This test method applies to analysis using aqueous dispersions.1.4 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 Quartz has been classified by IARC as a Group I carcinogen. For specific hazard information in handling this material, see the supplier's Material Safety Data Sheet.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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5.1 The gradation of the soil is used for classification in accordance with Practice D2487.5.2 The gradation (particle-size distribution) curve is used to calculate the coefficient of uniformity and the coefficient of curvature.5.3 Selection and acceptance of fill materials are often based on gradation. For example, highway embankments, backfills, and earthen dams may have gradation requirements.5.4 The gradation of the soil often controls the design and quality control of drainage filters, and groundwater drainage.5.5 Selection of options for dynamic compaction and grouting is related to gradation of the soil.5.6 The gradation of a soil is an indicator of engineering properties. Hydraulic conductivity, compressibility, and shear strength are related to the gradation of the soil. However, engineering behavior is dependent upon many factors (such as effective stress, stress history, mineral type, structure, plasticity, and geologic origins) and cannot be based solely upon gradation.NOTE 1: The quality of the result produced by these test methods is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of these test methods are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.1.1 Soils consist of particles with various shapes and sizes. This test method is used to separate particles into size ranges and to determine quantitatively the mass of particles in each range. These data are combined to determine the particle-size distribution (gradation). This test method uses a square opening sieve criterion in determining the gradation of soil between the 3-in. (75-mm) and No. 200 (75-µm) sieves.1.2 The terms, soils and material, are used interchangeably throughout the standard.1.3 In cases where the gradation of particles larger than 3 in. (75 mm) sieve is needed, Test Method D5519 may be used.1.4 In cases where the gradation of particles smaller than No. 200 (75-µm) sieve is needed, Test Method D7928 may be used.1.5 Typically, if the maximum particle size is equal to or less than 4.75 mm (No. 4 sieve), then single-set sieving is applicable. Furthermore, if the maximum particle size is greater than 4.75 mm (No. 4 sieve) and equal to or less than 9.5 mm (3/8-in sieve), then either single-set sieving or composite sieving is applicable. Finally, if the maximum particle size is equal to or greater than 19.0 mm (3/4-in sieve), composite sieving is applicable. For special conditions see 10.3.1.6 Two test methods are provided in this standard. The methods differ in the significant digits recorded and the size of the specimen (mass) required. The method to be used may be specified by the requesting authority; otherwise Method A shall be performed.1.6.1 Method A—The percentage (by mass) passing each sieve size is recorded to the nearest 1 %. This method must be used when performing composite sieving. For cases of disputes, Method A is the referee method.1.6.2 Method B—The percentage (by mass) passing each sieve size is recorded to the nearest 0.1 %. This method is only applicable for single sieve-set sieving and when the maximum particle size is equal to or less than the No. 4 (4.75-mm) sieve.1.7 This test method does not cover, in any detail, procurement of the sample. It is assumed that the sample is obtained using appropriate methods and is representative.1.8 Sample Processing—Three procedures (moist, air dry, and oven dry) are provided to process the sample to obtain a specimen. The procedure selected will depend on the type of sample, the maximum particle-size in the sample, the range of particle sizes, the initial conditions of the material, the plasticity of the material, the efficiency, and the need for other testing on the sample. The procedure may be specified by the requesting authority; otherwise the guidance given in Section 10 shall be followed.1.9 This test method typically requires two or three days to complete, depending on the type and size of the sample and soil type.1.10 This test method is not applicable for the following soils:1.10.1 Soils containing fibrous peat that will change in particle size during the drying, washing, or sieving procedure.1.10.2 Soils containing extraneous matter, such as organic solvents, oil, asphalt, wood fragments, or similar items. Such extraneous matter can affect the washing and sieving procedures.1.10.3 Materials that contain cementitious components, such as cement, fly ash, lime, or other stabilization admixtures.1.11 This test method may not produce consistent test results within and between laboratories for the following soils and the precision statement does not apply to them.1.11.1 Friable soils in which the sieving processes change the gradation of the soil. Typical examples of these soils are some residual soils, most weathered shales and some weakly cemented soils such as hardpan, caliche or coquina.1.11.2 Soils that will not readily disperse such as glauconitic clays or some dried plastic clays.1.11.3 To test these soils, this test method must be adapted, or altered, and these alterations documented. Depending on the design considerations, a specialized gradation-testing program could be performed. The alterations could require the washing and sieving procedures to be standardized such that each specimen would be processed in a similar manner.1.12 Some materials that are not soils, but are made up of particles may be tested using this method. However, the applicable sections above should be used in applying this standard.1.13 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026, unless superseded by this test method.1.13.1 The procedures used to specify how data are collected/recorded and calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user's objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering design.1.14 Units—The dimensional values stated in either SI units or inch-pound units are to be regarded as standard, such as 200-mm or 8-in. diameter sieve. Except, the sieve designations are typically identified using the “alternative” system in accordance with Practice E11, such as 3 in. and No. 200, instead of the “standard” system of 75 mm and 75 µm, respectively. Only the SI units are used for mass determinations, calculations, and reported results. However, the use of balances or scales recording pounds of mass (lbm) shall not be regarded as nonconformance with this standard.1.15 A summary of the symbols used in this test method is given in Annex A1.1.16 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1.17 Table of Contents—All tables and figures appear at the end of this standard.  Section 1 Method A 1.6.1 Method B 1.6.2 Sample Processing 1.8 Units 1.14Referenced Documents 2 ASTM Standards 2.1Terminology 3 General 3.1 Definitions 3.2 Definitions of Terms Specific to This Standard 3.3Summary of Test Method 4 5Apparatus 6 Sieves 6.1  Standard Sieve Set 6.1.1  Washing Sieve, No. 200 (75-μm) 6.1.2  Designated Separating Sieve 6.1.3 Washing Sink with Spray Nozzle 6.2 Mechanical Sieve Shaker 6.3 Balances 6.4 Drying Oven 6.5 Sieving Containers 6.6  Specimen Containers 6.6.1  Collection/Transfer Device 6.6.2  Cumulative Mass Container 6.6.3 Sieve Brushes 6.7 Miscellaneous Items 6.8 Splitter or Riffle Box (optional) 6.9 Quartering Accessories (optional) 6.10 Mortar and Rubber-Covered Pestle (optional) 6.11 Low Temperature Drying Oven (optional) 6.12 Ultrasonic Water Bath (optional) 6.13 Dispersion Shaker (optional) 6.14Reagents 7 Sodium Hexametaphosphate 7.1  Dry Addition 7.1.1.1  Solution 7.1.1.2Preparation of Apparatus 8 Verification of Sieves 8.1  Verification Interval 8.1.1 Verification of Mechanical Sieve Shaker and Standard Shaking Period 8.2  Large Mechanical Sieve Shaker 8.2.1  Verification Interval 8.2.2  Hand Sieve Shaking Procedure 8.2.3Sampling 9 General 9.1 Sample Sources 9.2  Bulk Samples 9.2.1  Jar and Small Bag Samples 9.2.2  Intact Tube Samples 9.2.3  Samples from Prior Testing 9.2.4Specimen 10 General 10.1 Minimum Mass Requirement 10.2 Selection of Sieving Procedure 10.3  Single Sieve-Set Sieving 10.3.1  Composite Sieving 10.3.2 Specimen Procurement 10.4  Moist Procedure 10.4.1  Air-Dried Procedure 10.4.2  Oven-Dried Procedure 10.4.3  Discussion on Segregating Soils 10.4.4 Specimen Procurement and Processing Requirements 10.5  Moist Procedure, Single Sieve-Set Sieving 10.5.1  Moist Procedure, Composite Sieving 10.5.2   Coarse Portion Acceptable Loss (CPL) 10.5.2.3  Air-Dried Procedure, General 10.5.3  Air-Dried Procedure, Single Sieve-Set Sieving 10.5.4  Air-Dried Procedure, Composite Sieving 10.5.5  Oven-Dried Procedure, General 10.5.6  Oven-Dried Procedure, Single Sieve-Set Sieving 10.5.7  Oven-Dried Procedure, Composite Sieving 10.5.8Procedure (Sieving) 11 General 11.1 Mass Measurements 11.2 Sieve Overloading 11.3 Single Sieve-Set Sieving 11.4  Specimen Mass 11.4.1  Specimen Dispersion 11.4.2   Soaking without a Dispersant 11.4.2.1   Soaking with a Dispersant 11.4.2.2   Using an Ultrasonic Water Bath 11.4.2.3  Washing Specimen 11.4.3   General Precautions 11.4.3.1   Transfer Specimen 11.4.3.2   Washing 11.4.3.3   Transfer Washed Specimen 11.4.3.4  Dry Sieving 11.4.4   Sieve Set 11.4.4.1   Mechanical Shaking 11.4.4.2  Cumulative Material/Mass Retained 11.4.5   First Sieve 11.4.5.1   Remaining Sieves 11.4.5.2 Composite Sieving, Single Separation 11.5  Coarser Portion 11.5.1   Dispersing and Washing 11.5.1.1   Dry Sieving Coarser Portion 11.5.1.3  Subspecimen from Finer Portion 11.5.2   Dispersing and Washing Subspecimen 11.5.2.1   Dry Sieving Subspecimen 11.5.2.2 Composite Sieving, Double Separation 11.6  Separating 1st Subspecimen 11.6.1  Dispersing and Washing 2nd Coarser Portion 11.6.2  Dry Sieving 2nd Coarser Portion 11.6.3  2nd Subspecimen 11.6.4   Dispersing and Washing 2nd Subspecimen 11.6.4.1   Dry Sieving 2nd Subspecimen 11.6.4.2Calculations 12 General 12.1 Sieve Overloading 12.2 Single Sieve-Set Sieving, Percent Passing 12.3 Composite Sieving, Mass of Specimen 12.4 Composite Sieving, Single Separation 12.5  Composite Sieving, Coarser Portion (CP) 12.5.1   CP, Percent Passing 12.5.1.1   CP, Composite Sieving Correction    Factor (CSCF) 12.5.1.2   CP, Acceptable Loss During Washing    and Sieving 12.5.1.3   Composite Sieving, Subspecimen (finer    portion) 12.5.2   Percent Passing, Specimen (combined    coarser and finer portions) 12.5.2.1   Subspecimen, Acceptable Fractional    Percent Retained 12.5.2.2   Percent Passing, Acceptance Criterion 12.5.2.3   Finer Portion, Percent Passing (optional) 12.5.3 Composite Sieving, Double Separation 12.6  1st Coarser Portion 12.6.1  1st Subspecimen 12.6.2   Percent Passing, 2nd Coarser Portion 12.6.2.1   2nd Coarser Portion, Composite Sieving    Correction Factor (2ndCSCF) 12.6.2.2   2nd Coarser Portion, Acceptable Loss on    Sieving and Washing 12.6.2.3   2nd Coarser Portion, Acceptable Fractional    Percent Retained 12.6.2.4   Percent Passing, Acceptance Criterion 12.6.2.5  2nd Subspecimen 12.6.3   Percent Passing, 2nd Subspecimen 12.6.3.1   2nd Subspecimen, Acceptable Fractional     Percent Retained 12.6.3.2   Percent Passing, Acceptance Criterion 12.6.3.3  1st Finer Portion, Percent Passing (optional) 12.6.4   2nd Finer Portion, Composite Sieving    Correction Factor (optional) 12.6.4.1   2nd Finer Portion, Percent Passing for    2nd Subspecimen (optional) 12.6.4.2Report: Test Data Sheet(s)/Form(s) 13Precision and Bias 14 Precision 14.1  Precision Data Analysis 14.1.1  Calculation of Precision 14.1.2   Acceptance Criterion 14.1.2.4  Triplicate Test Precision Data (TTPD) 14.1.3   TTPD-Method A Repeatability 14.1.3.1   TTPD-Method A Reproducibility 14.1.3.2   TTPD-Method B Repeatability 14.1.3.3   TTPD-Method B Reproducibility 14.1.3.4  Single Test Precision Data (STPD) 14.1.4   STPD-Method A Reproducibility 14.1.4.1   STPD-Method B Reproducibility 14.1.4.2  Soils Type 14.1.5  Discussion on Precision 14.1.6 Bias 14.2Keywords 15ANNEXES  Symbols Annex A1Sample to Specimen Splitting/Reduction Methods Annex A2 General A2.1  Mechanical Splitting A2.1.1  Quartering A2.1.2  Miniature Stockpile Sampling A2.1.3 Sample Processing Recommendation Based  on Soil Type A2.2  Clean Gravel (GW, GP) and Clean Sand   (SW, SP) A2.2.1  Gravel with Fines (GM, GC, GC-GM,   GW-GM, GP-GM, GP-GC) A2.2.2  Sand with Silt Fines (SW-SM, SP-SM,   SM) A2.2.3  Sand with Clay and Silt Fines or Clay   Fines (SW-SC, SP-SC, SC, SC-SM) A2.2.4  Silts with Sand or Gravel, or Both (ML,   MH) A2.2.5  Organic Soils with Sand or Gravel, or   Both (OL, OH) A2.2.6APPENDIXES  Example Test Data Sheets/Forms Appendix X1 General X1.1Precision: Example Calculations Appendix X2 General X2.1TABLES and FIGURES  1.18 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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