1、Designation:D5779/D5779M14Standard Test Method forField Determination of Rapid Specific Gravity of Rock andManmade Materials for Erosion Control1This standard is issued under the fixed designation D5779/D5779M;the number immediately following the designation indicates theyear of original adoption or
2、,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the rapidspecific gravity of rock or man
3、-made materials for erosioncontrol.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may
4、 result in non-conformancewith the standard.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.3.1 For purposes of comparing measured or calculatedvalue(s)with specified limits,th
5、e measured or calculatedvalue(s)shall be rounded to the nearest decimal or significantdigits in the specified limits.1.3.2 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 thesign
6、ificant digits that generally 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 becomme
7、nsurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analyticalmethods for engineering design.1.4 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
8、standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD653 Terminology Relati
9、ng to Soil,Rock,and ContainedFluidsD3740 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,andConstruc
10、tion Materials TestingD4992 Practice for Evaluation of Rock to be Used forErosion ControlD6026 Practice for Using Significant Digits in GeotechnicalDataD6473 Test Method For Specific Gravity And Absorption ofRock For Erosion Control3.Terminology3.1 DefinitionsFor definitions of common technical term
11、sin this standard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 rapid specific gravitythe ratio of the mass in air of aunit volume of relatively impermeable rock or man-madematerial,to the mass of an equal volume of water measuredunder a variety of temperatures.4
12、.Summary of Test Method4.1 An air-dried specimen(block,chunk,or slab)of rock ormanmade material,such as concrete or masonry rubble frompaving and building demolition,is weighed in air and thenweighed again while immersed in water.Using the masses,thefield rapid specific gravity is calculated.The det
13、erminedspecific gravity can then be used to determine a mass per unitvolume.1This 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 Jan.15,2014.Published February 2014
14、.Originallyapproved in 1995.Last previous edition approved in 2008 as D5779 081.DOI:10.1520/D5779_D5779M-14.2For 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
15、 Document Summary page onthe ASTM website.*A Summary 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 5.Significance and Use5.1 Riprap and armor material are composed of pieces ofnatura
16、l rock or manmade material that are placed on construc-tion projects,shorelines,streambeds,bridge abutments,pilingsand other structures to minimize the effects of erosion.Theability of rock or manmade material to withstand deteriorationfrom weathering affects both the effectiveness of the projectand its cost.The specific gravity and absorption provide usefulinformation that can be used in evaluating possible deteriora-tion of rock or manmade material.5.2 Test specimens equal in size to the propo
