ASTM_D_2995_-_14.pdf

Designation:D299514Standard Practice forEstimating Application Rate and Residual Application Rateof Bituminous Distributors1This standard is issued under the fixed designation D2995;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice covers the determination of transverse andlongitudinal application rate and residual application rate ofasphalt distributors in gallons per square yard(or litres persquare metre).1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 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.2.Summary of Practice2.1 Pre-weighed pads are placed on the surface of theroadway in front of the distributor.The asphalt distributor isdriven over the pads while spraying asphalt.For Option A,thepads are immediately removed from the roadway and imme-diately reweighed.The weight of asphalt applied to the pads isdetermined by subtraction and the rate of application iscalculated.Option B,for emulsified asphalt,includes ovendrying the pads to a constant weight to determine the residualasphalt application rate.NOTE1Option B is not to be used for cutback asphalts.3.Significance and Use3.1 Option AThe transverse and longitudinal applicationrate and variability in application rate of bituminous materialapplied to a pavement surface using a bituminous distributorcan be estimated using Option A.3.2 Option BThe transverse and longitudinal residualapplication rate and variability in residual application rate fromemulsified asphalt applications to a pavement surface using abituminous distributor can be estimated by using Option B.4.Apparatus4.1 Balance,sensitive to 0.1 g.4.2 Weighing Box or Balance Shield,required at site forOption A,to protect balance from wind when the balance is inuse at the project site(see Fig.1).4.3 Balance Table and Work Table,for weighing.4.4 Oven,for drying the samples for Option B,capable ofmaintaining a temperature of 230 6 9F(110 6 5C).5.Materials5.1 Geotextile Pads(or other durable absorbent pads),2weighing a minimum of 8 oz/yd2and measuring 12 in.(304.8mm)by 12 in.(304.8 mm).5.2 Aluminized Duct Tape,measuring 2 in.(50.8 mm)wideand 6 in.(152.4 mm)long.5.3 Butcher Paper#50(or other durable paper),3measur-ing approximately 30 in.(762 mm)wide for temporaryprotection of geotextile pads during calibration.6.Procedure(Transverse Application Rate)6.1 Select enough of the geotextile fabric pads so that whenplaced transversely end-to-end on the roadway a continuousstrip is created across the width of the roadway to be sprayedwith asphalt.6.2 Create a loop with the duct tape with the adhesive sidefacing out.Place two loops of duct tape on one edge of each ofthe geotextile fabric pads.6.3 Obtain the weight of the pad and tape assembly to thenearest 0.1 g.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.24 onAsphalt Surface Treatments.Current edition approved July 15,2014.Published September 2015.Originallyapproved in 1971.Last previous edition approved in 2009 as D2995 99(2009).DOI:10.1520/D2995-14.2Non-woven,needle punched,heat fused on one side geotextiles by PhillipsFibers,Monsanto,and Amoco have been found to be suitable materials for thispurpose.3Butcher paper from Baumann Paper Co.,Baumann Rd.,Lexington,KY hasbeen found to be suitable for this purpose.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.4 Place the pad assembly with the tape facing down on theroadway so the taped edge is facing the distributor.Applypressure to the taped pad to secure it to the roadway.Continuethis operation for the remaining pads for the entire widthdesired for measurement.6.5 Place two sheets of the butcher paper over the padassemblies in the area where the distributor tires will fall on thepad assemblies as shown in Fig.2.These sheets should bepositioned so they protect the pad assemblies from damage bythe distributor tires as the truck passes over the pad assemblies.The sheets of butcher paper should adhere to the front and reartires as the distributor passes over the pad assemblies leavingthe pad assemblies available to receive the asphalt as it issprayed onto the roadway surface.6.6 Option AAs soon as the distributor ha