1、Designation:D299599(Reapproved 2009)Standard Practice forEstimating Application Rate of 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 las
2、t 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 Department of Defense.1.Scope1.1 This practice covers the determination of tra
3、nsverse andlongitudinal application rate of asphalt distributors in gallonsper square yard(or litres per square metre).1.2 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
4、 safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.3 The values given in inch-pound units are to be regardedas the standard.The SI values given in parentheses are forinformation purposes only.2.Summary of Practice2.1 Test Method A:2.1.1 Pre-weighed
5、 calibration pads are placed on the surfaceof the roadway in front of the distributor to be calibrated.Theasphalt distributor to be calibrated is driven over the calibrationpads while spraying asphalt.The calibration pads are removedfrom the roadway and reweighed.The weight of asphaltapplied to the
6、pads is determined by subtraction and the rate ofapplication is calculated.2.2 Test Method B:2.2.1 Containers are placed under each nozzle of a bitumi-nous distributor and bituminous material is sprayed into thecontainers for a known period of time.The volume ofbituminous material sprayed after this
7、 period is calculated.Thetransverse uniformity of bituminous material sprayed on thepavement is obtained from this calculation and the distributionof bituminous material applied longitudinally on the pavementis calculated as a function of the distributor velocity.3.Significance and Use3.1 The amount
8、 of bituminous material applied to a pave-ment surface using a bituminous distributor can be estimatedusing the described procedure.4.Apparatus4.1 Test Methods A and B:4.1.1 Balance,sensitive to 0.1 g.4.1.2 Weighing Box or Balance Shield,to protect balancefrom wind when the balance is in use at the
9、project site(seeFig.1).4.1.3 Balance Table and Work Table,for weighing.4.2 Test Method B:4.2.1 Elliptical Containers,measuring approximately 3.5 in.(88.9 mm)along the short axis and 9 in.(228.6 mm)along thelong axis of the ellipse and 8 in.(203.2 mm)in height,capableof an internal volume of approxim
10、ately 1 gal.4.2.2 Rubber Bands,capable of a snug fit when stretchedaround the elliptical containers.4.2.3 Stopwatch,capable of recording to the nearest 0.1 s.5.Materials5.1 Test Method A:5.1.1 Geotextile Pads,2weighing a minimum of 8 oz/yd2and measuring 12 in.(304.8 mm)by 12 in.(304.8 mm).5.1.2 Alum
11、inized Duct Tape,measuring 2 in.(50.8 mm)wide and 6 in.(152.4 mm)long.5.1.3 Butcher Paper#50,3measuring 30 in.(762 mm)by950 ft,for temporary protection of geotextile pads duringcalibration.5.2 Test Method B:5.2.1 Plastic Bags,capable of fitting inside the ellipticalcans but of sufficiently larger di
12、mension to allow folding overthe edge of the elliptical containers once placed inside.6.Procedure(Transverse Application Rate)6.1 Test Method A:6.1.1 Select enough of the geotextile fabric pads so thatwhen placed end-to-end on the roadway a continuous strip iscreated across the width of the roadway
13、to be sprayed withasphalt.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.24 onBituminous Surface Treatments.Current edition approved June 1,2009.Published July 2009.Originally approvedin 1971.Last previo
14、us edition approved in 2004 as D2995 04.DOI:10.1520/D2995-99R09.2Non-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 b
15、e suitable for this purpose.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.1.2 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.6.1.3 Obtain
16、 the weight of the pad and tape assembly to thenearest 0.1 g.6.1.4 Place the pad assembly with the tape facing down onthe roadway 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 calibration.6.1.5 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 b