1、Designation:D647315Standard Test Method ForSpecific Gravity And Absorption of Rock For ErosionControl1This standard is issued under the fixed designation D6473;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision
2、.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of specificgravity and absorption of rock for erosion control,commonlyreferred to as riprap o
3、r armor stone.The specific gravity maybe expressed as bulk specific gravity or apparent specificgravity.Bulk specific gravity and absorption are based on a24 6 4-h soaking time for the rock specimens tested.This testis appropriate for breakwater stone,armor stone,riprap,andgabion sized rock material
4、s.1.2 The use of reclaimed concrete and other materials isbeyond the scope of this test method.1.3 UnitsThe values stated in SI units are to be regardedas the standard.The values given in parentheses are mathemati-cal conversions to inch-pound units that are provided forinformation only and are not
5、considered standard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.4.1 For purposes of comparing measured or calculatedvalue(s)with specified limits,the measured or calculated
6、value(s)shall be rounded to the nearest decimal or significantdigits in the specified limits.1.4.2 The procedures used to specify how data are collected/recorded or calculated,in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that gene
7、rally should be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these consi
8、derations.It is beyond the scopeof this standard to consider significant digits used in analyticalmethods for engineering design.1.5 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 ap
9、pro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C127 Test Method for Relative Density(Specific Gravity)and Absorption of Coarse AggregateD653 Terminology Relating to Soil,Rock,and ContainedFluids
10、D3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD4992 Practic
11、e for Evaluation of Rock to be Used forErosion ControlD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 DefinitionsFor definitions of common technical termsused in this standard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 absorptio
12、nthe increase in the mass of rock due towater in the pores of the material,but not including wateradhering to the outside surface of the particles.Absorption isexpressed as a percentage of the dry mass.3.2.2 apparent specific gravitythe ratio of the mass in airof a given volume of the impermeable po
13、rtion of a permeablematerial(that is,the solid matter including its impermeablepores or voids)at a stated temperature to the mass of an equalvolume of distilled water at the same stated temperature.Thevalue is dimensionless.3.2.3 bulk specific gravitythe ratio of the mass in air of agiven volume of
14、a permeable solid(including both permeable1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.17 on Rock for ErosionControl.Current edition approved July 1,2015.Published July 2015.Originally approvedin 1999.Last previ
15、ous edition approved in 2010 as D6473-10.DOI:10.1520/D6473-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A S
16、ummary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and impermeable voids within the material)at a statedtemperature,to the mass in air of an equal volume of distilledwater at the same stated temperature.The value is dimension-less.3.2.4 bulk specific gravity(saturated surface-dry)(SSD)the ratio of the mass of a given volume of permeable solid,(including the mass of water within
