SIST EN 12272-1:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Oberflächenbehandlung - Prüfverfahren - Teil 1: Dosierung und Querverteilung von Bindemitteln und SplittEnduits superficiels d'usure - Méthodes d'essai - Partie 1: Taux d'épandage et régularité transversale du liant et des gravillonsSurface dressing - Test methods - Part 1: Rate of spread and accuracy of spread of binder and chippings93.080.20Materiali za gradnjo cestRoad construction materialsICS:Ta slovenski standard je istoveten z:EN 12272-1:2002SIST EN 12272-1:2002en01-september-2002SIST EN 12272-1:2002SLOVENSKI
STANDARD



SIST EN 12272-1:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12272-1February 2002ICS 93.080.20English versionSurface dressing - Test methods - Part 1: Rate of spread andaccuracy of spread of binder and chippingsEnduits superficiels d'usure - Méthodes d'essai - Partie 1:Taux d'épandage et régularité transversale du liant et desgravillonsOberflächenbehandlung - Prüfverfahren - Teil 1: Dosierungund Querverteilung von Bindemitteln und SplittThis European Standard was approved by CEN on 9 November 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12272-1:2002 ESIST EN 12272-1:2002



EN 12272-1:2002 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Determination of the rate of spread of binder.55Determination of the rate of spread of chippings.96Determination of the accuracy of spread of binder.127Determination of the accuracy of spread of chippings.15Annex A (normative)
Determination of the accuracy of spread of chippings.19Annex B (informative)
Equipment recommended for use in the determination of the accuracy ofspread of binder test.21Annex C (normative)
Determination of the accuracy of spread of binder.27Annex D (informative)
The picking frame, used in the determination of the accuracy
of spread ofchipping test.28SIST EN 12272-1:2002



EN 12272-1:2002 (E)3ForewordThis document EN 12272-1:2002 has been prepared by Technical Committee CEN/TC 227 "Road materials", thesecretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by August 2002, and conflicting national standards shall be withdrawn at the latest byJune 2004.In this standard the annexes A and C are normative and the annexes B and D informative.This European Standard is one of a series of standards as listed below:EN 12272-1, Surface dressing
Test methods
Part 1: Rate of spread and accuracy of spread of binder andchippings.prEN 12272-2, Surface dressing
Test methods
Part 2: Visual assessment of defects.prEN 12272-3, Surface dressing
Test methods
Part 3: Determination of binder aggregate adhesivity by the vialitplate shock test method; German version prEN 12272-3:1997.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 12272-1:2002



EN 12272-1:2002 (E)41 ScopeThis European Standard specifies test methods for determining the rates of spread and accuracy of spread ofbinder and chippings of a surface dressing on a section of road at a given time. It is also applicable to surfacedressings on airfields and other trafficked areas.The test methods are used on site to check the ability of binder sprayers and chipping spreaders to meet theintended rates of spread and tolerances and coefficients of variation.The test methods for measuring the rates of spread and accuracy of spread of binders and chippings are notapplicable to combined chipping-binder spreaders.2 Normative referencesNot applicable.3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1surface dressingsurface treatment consisting of the successive laying of at least one layer of binder and at least one layer ofchippings3.2chippingscoarse aggregate within a narrow grading range, practically free of finesNOTEChippings can have specified values for strength, soundness, shape, polishing resistance, resistance to abrasion,purity, durability and affinity to bituminous binder.3.3rate of spread of binderaverage mass of binder in kilograms per square metre (kg/m²), applied to the road surface when measured inaccordance with this European Standard3.4rate of spread of chippingsaverage bulk volume in litres per square metre (l/m²) or, mass in kilograms per square metre (kg/m²) applied to theroad surface, when measured in accordance with this European Standard3.5proportional rangedifference between the maximum and minimum individual values of rates of spread of binder or chippingsdetermined divided by the mean value, using the test methods in this European Standard3.6accuracy of spread of bindercoefficient of variation of the mass of binder applied to the road surface when measured in accordance with thisEuropean Standard. The value and graph indicate the ability of the sprayer to apply binder evenly across the road3.7accuracy of spread of chippingscoefficient of variation of the mass of chippings applied to the road surface when measured in accordance with thisEuropean Standard. The value and graph indicate the ability of the chipping spreader to apply the chippings evenlyacross the roadSIST EN 12272-1:2002



EN 12272-1:2002 (E)54 Determination of the rate of spread of binder4.1 PrincipleSamples of the binder sprayed by the binder sprayer are collected to determine the average rate of spread. At leastfive trays, boards or tiles are used, each with a minimum area of 0,1 m2 and having a minimum combined area of0,5 m2, spaced evenly across the full width of the road to be sprayed. Alternatively, a continuous strip of tiles orboards abutting each other is arranged across this entire width.4.2 Apparatus4.2.1 TraysRectangular trays of metal or other material sufficiently robust to resist deformation in use. (Steel plate 2 mm thickis suitable).NOTEThe trays can contain an absorbent material to inhibit binder flow.The internal dimensions of each tray in millimetres (mm) shall be the following: Side length(250 ± 2) mm to (500 ± 2) mm; Height(5 ± 2) mm to (10 ± 2) mm.A set of trays used for a test shall not vary in side dimensions by more than 10 mm from each other.4.2.2 Tiles or absorbent fibre boardsRectangular carpet tiles or absorbent fibre boards, sufficiently absorbent to hold at least 1,5 times the specified rateof binder without loss of binder, e.g. flowing off whilst spraying or transferring to bags or penetration through the tileor board.The dimensions of the tiles or boards (exposed area to collect binder) in millimetres (mm) shall be the following: Side length(250 + 2) mm to (500 + 2) mm; Thicknessmaximum 25 mm.The tiles or boards may be larger than the maximum dimension but shall be masked by tape to give the maximumdimension.A set of trays used for a test shall not vary in side dimensions by more than 10 mm from each other.4.2.3 RulerRuler, with a minimum length of 500 mm to measure the dimension of the trays, boards or tiles to the nearest1 mm.SIST EN 12272-1:2002



EN 12272-1:2002 (E)64.2.4 Portable balancePortable balance, readable to 0,1 g and of sufficient capacity to weigh one tray with 1,5 x the maximum rate ofspread of binder.4.2.5 Plastic bagsPlastic bags, lightweight and capable of containing the binder and tray or board or tile for weighing without any lossby leakage or evaporation.4.2.6 TapeAdhesive tape, used to hold the trays, boards or tiles to the road and to mask them to the required dimensions.When removed, the tape shall not damage the masked parts of absorbent boards of carpet tiles so as to ensurethere is no loss in mass of the underlying material.4.3 Procedure4.3.1 Preparation of the trays, carpet tiles or absorbent fibre boardMark the trays or carpet tiles or absorbent fibre boards with an indelible identification. Insert an absorbent materialas a liner into each tray. Weigh the trays, the carpet tiles or absorbent fibre boards together with a plastic bag, tothe nearest 1 g and record these masses as the mass of each sampling device before spraying.4.3.2 Location and placement of the tray, carpet tiles or absorbent fibre boardThe test site shall be at least 30 m from the start of the spraying operation.Space the trays, carpet tiles or absorbent fibre boards across the width of road which is to be sprayed with binder,and at least 200 mm from the edge as shown in Figure 1. If adhesive tape is used to secure the carpet tiles orabsorbent fibre board to the road during spraying, measure the length and width of each of the areas exposed tothe binder spray to the nearest 5 mm for the calculation of the exposed area.NOTE 1When the rates of transverse distribution are intentionally different in the same transverse profile then the trays,boards or carpet tiles related to the same measurement should be placed in areas where the intended rate of spread is thesame.NOTE 2Care should be taken to ensure that when spray curtains are being used, to avoid touching the trays, boards or tiles.SIST EN 12272-1:2002



EN 12272-1:2002 (E)7Figure 1 — Trays or carpet tiles or absorbent fibre boards, diagrammatic4.3.3 Removal and weighing of the trays, carpet tiles or absorbent fibre boardsWithin 3 min of the binder being sprayed onto the road, but before any chippings are applied, remove the trays,carpet tiles or absorbent fibre board from the road surface. Care shall be taken not to lose or gain any binder. Theninsert each sampling device into its own plastic bag before weighing it to the nearest 1 g. Record the mass of eachsampling device after spraying.4.4 Expression of resultsCalculate the binder mass:1i2iiMMM(1)whereMi is the binder mass retained on the sampling device, expressed in kilograms (kg);M2i is the mass of the sampling device after spraying, expressed in kilograms (kg);M1i is the mass of the sampling device before spraying, expressed in kilograms (kg);Calculate the rate of spread:iiiAMd(2)wheredi is the rate of spread of binder, expressed in kilograms per square metre (kg/m2), for each samplingdevice;Mi is the binder mass retained on the sampling device, expressed in kilograms (kg);Ai is the area of sampling device exposed to the binder spray, expressed in square metres (m²).Spraying DirectionMaximum 500Minimum 250Maximum 500Minimum 250Minimum 5 trays, boards or tilesMaximum 25thicknessTapeAreaAiFoam sheet orabsorbentmaterial insertMetal trayMaximum 10Minimum 200Edge of sprayDimensions in millimetresSIST EN 12272-1:2002



EN 12272-1:2002 (E)8Calculate the mean rate of spread of the binder:NddddddD).(N54321(3)whereDis the mean rate of spread of binder, expressed in kilogram per square metre (kg/m2), reported tothe nearest 0,05 kg/m2 ;d1 to dNare the rates of spread of binder on each sampling device;N is the number of sampling devices used in the test.Calculate the proportional range:DddP)(minmaxR(4)wherePRis the proportional range;dmax is the highest rate of spread of binder found on an individual sampling device;dmin is the lowest rate of spread of binder found on an individual sampling device.Repeat the test if the proportional range is greater than 0,20.NOTEIf this recurs it indicates that a measurement of the transverse distribution can be necessary (see clause 6).4.5 Test reportThe test report shall contain:a) a statement that the test has been performed in accordance with this European Standard;b) identification of sprayer and spraybar used;c) spraybar height;d) spraybar width used;e) location of site test;f) date of test;g) climatic conditions likely to affect the test result (e.g. windy, etc.);h) binder temperature recorded from the tank;i) binder type;j) specified rate of spread and tolerance;k) results as calculated in 4.4;l) any remarks;m) name and signature of the person responsible for conducting the test.SIST EN 12272-1:2002



EN 12272-1:2002 (E)95 Determination of the rate of spread of chippings5.1 PrincipleChippings are collected in three calibrated boxes laid on the road in front of the chipping spreader, in order todetermine the rate of spread. When each box is laid flat, with its lid removed, it serves as a tray to collect thechippings from a known area. With its lid replaced, each box is stood on its end and used to directly measure thebulk volume of the collected chippings. Alternatively, each box is used to collect chippings for subsequent weighing.NOTEA method of determining the shoulder to shoulder rate of spread of chippings is included in annex A.5.2 Apparatus5.2.1 Box for measuring the rate of spread of chippingsRectangular box, for measuring the rate of spread of chippings, with a rigid, sliding, transparent graduated lid, asshown in Figure 2.Figure 2 — The chipping rate of spread box(Dimensions shown are all internal, with a tolerance of
2 mm)The lid shall either have 5 mm graduations or be directly graduated in litres per square metre (5 mm is equivalent to0,25 l/m2). For ease of reading, graduations shall be marked on both of the longer edges of the top of the lid.NOTEThe box can be fitted with support pins in case it has to be placed on the binder film.5.2.2 Portable balancePortable balance, readable to 10 g and of sufficient capacity to weigh both the box and the maximum rate of spreadof chippings.5.3 ProcedureWith its lid removed, place each open box flat on its base clear of the wheel tracks of the chipping spreader. Placethe major axis approximately parallel to the direction of travel of the chipping spreader. Place the three boxes inthree different transverse positions, all within a 30 m length of road.Each open box shall collect those chippings which are spread above it.Dimensions in millimetres40Support pinSleeve for lidTransparentgraduated lidGraduations800250SIST EN 12272-1:2002



EN 12272-1:2002 (E)105.4 Determination of the rate of spread of chippings by volume5.4.1 PrincipleWhen the chipping spreader has passed over the three calibrated boxes, their lids are replaced and each box isstood on its end and taped three times on a hard surface so as to ensure that the top surface of the chippingscontained in the box is flat and level.5.4.2 Expression of resultsMeasure the height of the top surface of the chippings to the nearest 5 mm or directly record the reading in litresper square metre (l/m²) from the graduations marked on the lid of each box to the nearest 0,25 l/m2 i.e. the bulkvolume of the chippings.If the scale on the box is graduated in millimetres, calculate the chipping rate of spread using the followingequation:60/20/31321321VHHHHHHR(5)whereRV is the rate of spread of chippings, expressed in litres per square metre (l/m2);H1, H2 and H3 are the heights, expressed in millimetres (mm), to the top surface of the chippings in thethree boxes.If the scale on the box has been graduated in litres per square metre (l/m²), calculate the chipping rate of spreadusing the following equation:3/321VVVVR(6)whereRV is the rate of spread of chippings, expressed in litres per square metre (l/m2);V1, V2 and V3 are the volumes, expressed in litres per square metre (l/m2).Repeat the test if the proportional range is greater than 0,20 (see 5.5.3).NOTEIf this recurs, it indicates that a measurement of the accuracy of spread can be necessary, see clause 7.5.5 Determination of the rate of spread of chippings by mass5.5.1 PrincipleThe mass of the chippings collected in each box is determined from the difference between the mass of the boxcontaining the chippings, and its mass when empty. The test result is the average of the masses of chippingsdetermined for each of the three boxes.5.5.2 Expression of resultsCalculate the chipping rate of spread using the following equation:321M35MMMR(7)SIST EN 12272-1:2002



EN 12272-1:2002 (E)11whereRM is the average rate of spread of chippings by mass, expressed in kilograms per square metre(kg/m2);M1, M2 and M3 are the mass of chippings determined for each of the three boxes, expressed in kilograms(kg).Repeat the test if the proportional range is greater than 0,20 (see 5.5.3).NOTE 1If this recurs it indicates that a measurement of the accuracy of spread may be necessary (see clause 7).NOTE 2To obtain rate of spread of RM in kilograms per square metre (kg/m²) from the rate of spread, RV, expressed in litresper square metre, (l/m²), Table 1 may be used as an approximate conversion guide when the particle density of the chippings isbetween 2 500 kg/m3 and 3 000 kg/m3.Table 1 — Conversion guideChippings SizemmRMkg/m210/146/84/62/46/1011/168/112/6Multiply RV
1,45Multiply RV
1,50Multiply RV
1,55Multiply RV
1,605.5.3 Further expression of resultsCalculate the proportional range using one of the following equation:)HH(H)H(H
P321minmaxR3 or )MM(M)M(M321minmax3
or )VV(V)V(V 3213minmax(8)wherePRis the proportional range;Hmax and HminMmax and MminVmax and Vminare the highest and lowest values recorded in the tests using the three boxes;H1, H2 and H3M1, M2 and M3V1, V2 and V3are the respective determinations of chippings contained in the boxes.SIST EN 12272-1:2002



EN 12272-1:2002 (E)125.6 Test reportThe test report shall contain:a) a statement that the test has been performed in accordance with this European Standard;b) identification of the chipping spreader used;c) width of spread tested;d) location of test;e) date of test;f) type and source of chippings used;g) size of chippings used;h) specified rate of spread and tolerance;i) results as calculated in 5.4.2;j) remarks;k) name and signature of person responsible for conducting the test.6 Determination of the accuracy of spread of binder6.1 PrincipleBinder is collected on a number of sampling devices which are placed side by side on the road surface, across thefull width which is to be sprayed, prior to the spraying of the binder. The mass of binder on each device is thendetermined from the difference between the masses of the device before and after spraying the binder and thearithmetic mean of all these binder masses calculated. This test is also known as the “Determination of thetransverse distribution of binder”.6.2 Apparatus6.2.1 Sampling devicesSampling devices, used for collecting the binder include sampling trays and rectangles of foam, carpet, board orother absorbent material. Each shall be able to collect
...