ASTM_D_5121_-_15.pdf

Designation:D512115Standard Practice forPreparation of Rock Slabs for Durability Testing1This standard is issued under the fixed designation D5121;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.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 practice covers the preparation of rock slabs forvarious tests and any visual inspections used to evaluate thedurability of rock for erosion control.These tests include,butare not limited to,Test Methods D5240,D5312,and D5313.This practice is appropriate for the assessment of breakwaterstone,armor stone,riprap,and gabion sized rock materials.1.2 UnitsThe values stated in SI units are to be regardedas standard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.3 All observed and measured values shall conform to theguidelines for significant digits and rounding established inPractice D6026,unless superseded by this standard.1.4 This practice offers a set of instructions for performingone or more specific operations.This document cannot replaceeducation or experience and should be used in conjunctionwith professional judgment.Not all aspects of this practice maybe applicable in all circumstances.This ASTM standard is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without consideration ofa projects many unique aspects.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.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 appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazards statement,see Section 7.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD4992 Practice for Evaluation of Rock to be Used forErosion ControlD5240 Test Method for Testing Rock Slabs to EvaluateSoundness of Riprap by Use of Sodium Sulfate orMagnesium SulfateD5312 Test Method for Evaluation of Durability of Rock forErosion Control Under Freezing and Thawing ConditionsD5313 Test Method for Evaluation of Durability of Rock forErosion Control Under Wetting and Drying ConditionsD6026 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 rock saw,na saw capable of cutting rock.The term“rock saw”shall include the blade which saws the rock,anycomponents that control or power the sawing process or both,and framework on which the blade and any other associatedcomponents are mounted.3.2.2 slab,na section of rock having two smooth,ap-proximately parallel faces,produced by two saw cuts.Thethickness of the slab is generally less than the other dimensionsof the rock.The slab will be the specimen of a rock which willsubsequently undergo durability tests.3.2.3 slice,nin rock testing,the smooth surface of rockpiece produced by the cutting of the rock by a rock saw.3.2.4 gabion-fill stone,nstone generally less than 25 kg(50 lb)and placed in baskets of wire or other suitable material.1This practice is under the jurisdiction of ASTM 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 1990.Last previous edition approved in 2006 as D512110.DOI:10.1520/D5121-15.2For 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 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 These baskets are then tied together to form an integralstructure designed to resist erosion along stream banks andaround bridge piers.4.Significance and Use4.1 This practice is used to prepare rock specimens fordurability testing and to evaluate any internal defects,such ascracks,that may not be apparent on the surfaces of brokenblocks of rock.Such evaluation can also aid in the selectionand location of slabs for testing as outlined in Practice D4992.In some cases,the need for further testing or evaluation may beeliminated.4.2 The sawing of rock samples will reduce them to asuitable specimen size and quantity for testi