ASTM_D_6935_-_11.pdf

Designation:D693511Standard Test Method forDetermining Cement Mixing of Emulsified Asphalt1This standard is issued under the fixed designation D6935;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.Scope1.1 This test method is intended to be a mixing test used toidentify or classify a slow setting,SS or CSS,type ofemulsified asphalt.1.2 This test method 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.2.Referenced Documents2.1 ASTM Standards:2C115 Test Method for Fineness of Portland Cement by theTurbidimeterC150 Specification for Portland CementE11 Specification for Woven Wire Test Sieve Cloth and TestSievesD6934 Test Method for Residue by Evaporation of Emulsi-fied AsphaltD6997 Test Method for Distillation of Emulsified Asphalt3.Significance and Use3.1 The result of this test method indicates the ability of aslow setting emulsified asphalt to mix with a finely divided,high surface area material(high early strength,Type III,portland cement)without breaking the emulsified asphalt.4.Sample Conditioning for Testing4.1 All emulsified asphalts shall be properly stirred toachieve homogeneity before testing.4.2 All emulsified asphalts with viscosity testing require-ments of 50C shall be heated to 50 6 3C in the originalsample container in a water bath or oven.The container shouldbe vented to relieve pressure.After the sample reaches 50 63C,stir the sample to achieve homogeneity.4.3 Emulsified asphalts with viscosity testing requirementsof 25C should be mixed or stirred at 25 6 3C in the originalsample container to achieve homogeneity.NOTE1Emulsified asphalts with viscosity testing requirements of25C may be heated and stirred as specified in 4.2,if necessary.In theevent the 4.2 method is used,the sample should be cooled to 25 6 3Cbefore testing.5.Apparatus5.1 Sievesa 180-m sieve and a 1.40-mm sieve with adiameter of approximately 75 mm,made of wire cloth con-forming to Specification E11.5.2 Pana tin box cover or shallow metal pan of appropri-ate size to fit over the bottom of the standard sieve.5.3 Mixing Bowla round-bottom metal dish or a kitchensaucepan of approximately 500-mL capacity.5.4 Stirring Roda metal rod with rounded ends,approxi-mately 10 mm in diameter.5.5 Graduatea 100-mL graduated cylinder.5.6 Balance,capable of weighing 1000 g to the nearest 0.1g.5.7 Ovencapable of maintaining a temperature of 163 63C.5.8 Thermometera thermometric device capable of mea-suring the temperature of the oven and the emulsified asphalt towithin 1C.6.Reagents and Materials6.1 Cementhigh-early-strength portland cement conform-ing to the requirements for Type III portland cement inSpecification C150 and having a minimum specific surfacearea of 1900 cm2/g,as measured by Test Method C115,Standard Test Method for Fineness of Portland Cement by theTurbidimeter.7.Procedure7.1 Dilute the emulsified asphalt with distilled or deionizedwater to a residue of 55%,as determined by distillation(TestMethod D6997)or by evaporation for 3 h at 163 6 3C.(Test1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved June 1,2011.Published July 2011 Originally approvedin 2004.Last previous edition approved in 2004 as D693504.DOI:10.1520/D6935-11.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Method D6934).Calculate the amount of water to be added tothe emulsified asphalt by using the equation:%Water5 1002554%Residue!x 100#(1)7.2 Sieve a portion of the cement through the 180-m sieve.Weigh 50.0 6 0.1 g of the cement passing the 180-m sieveinto the metal dish or saucepan.7.3 Bring the ingredients and apparatus to a temperature ofapproximately 25C before mixing.Add 100 mL of the dilutedemulsified asphalt to the cement and stir the mixture at oncewith the metal rod,using a circular motion at a rate of 60revolutions per minute,for 1 min.At the end of the 1-minmixing period,add approximately 150 mL of distilled ordeionized water,and continue the stirring for an additional 3min.NOTE2Rinsing the sample cylinder with three portions of approxi-mately 50 mL of distilled or deionized water is an acceptable procedurefor accomplishing this step.7.4 Determine the mass of the 1