1、Designation:D5240/D5240M12(Reapproved 2013)Standard Test Method forEvaluation of Durability of Rock for Erosion Control UsingSodium Sulfate or Magnesium Sulfate1This standard is issued under the fixed designation D5240/D5240M;the number immediately following the designation indicates theyear of orig
2、inal adoption or,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 test procedures for evaluatingthe soundness o
3、f rock for erosion control by the effects of asodium or magnesium sulfate solution on slabs of rock.Thetest is an accelerated weathering test that simulates the freezingand thawing of cold weather exposure.The rock slabs,pre-pared in accordance with procedures in Practice D5121,areintended to be rep
4、resentative of erosion control sized materialsand their inherent weaknesses.The test is appropriate forbreakwater stone,armor stone,riprap and gabion sized rockmaterials.The limitations of this test are twofold.First the test is asimulation of freezing and thawing conditions.The internalexpansive fo
5、rce,derived from the rehydration of the salt uponre-immersion,simulates the expansion of water on freezingrelying on chemical crystal formation to simulate freezingrather than the actual freezing of water.Secondly the size of thecut rock slab specimens may eliminate some of the internaldefects prese
6、nt in the rock structure.The test specimens maynot be representative of the quality of the larger rock samplesused in construction.Careful examination of the rock sourceand proper sampling are essential in minimizing this limitation.1.2 The use of reclaimed concrete and other materials isbeyond the
7、scope of this test method.1.3 UnitsThe values stated in either SI units or inch-pound units presented in brackets are to be regarded sepa-rately as standard.The values stated in each system may not beexact equivalents;therefore,each system shall be used inde-pendently of the other.Combining values f
8、rom the two systemsmay result in non-conformance with the 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values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.4.1 For purposes of comparing measured or calculatedvalue(s)w
9、ith specified limits,the measured or calculatedvalue(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 re
10、presentative of thesignificant 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 r
11、eported data to becommensurate with these considerations.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 theresponsibili
12、ty of the user of this 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:2C88 Test Method for Soundness of Aggregates by Use ofSodium Sulfate or Magnesium SulfateC295 Guide f
13、or Petrographic Examination ofAggregates forConcreteD653 Terminology Relating to Soil,Rock,and ContainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of
14、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 Practice for Evaluation of Rock to be Used forErosion Control1This test method is under the jurisdi
15、ction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.17 on Rock for ErosionControl.Current edition approved Jan.15,2013.Published January 2013.Originallyapproved in 1992.Last previous edition approved in 2012 as D5240/D5240M 12.DOI:10.1520/D5240_D5240M-12R1
16、3.2For 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 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 D5121 Practice for Preparation of Rock Slabs for DurabilityTestingD6026 Practice for Usin