kSIST FprEN 12272-1:2025

SLOVENSKI STANDARD
oSIST prEN 12272-1:2024
01-julij-2024
Površinske prevleke - Preskusne metode - 1. del: Količina pobrizga veziva in
posipa drobirja
Surface dressing - Test methods - Part 1: Rate of spread and accuracy of spread of
binder and chippings
Oberflächenbehandlung - Prüfverfahren - Teil 1: Dosierung und Querverteilung von
Bindemitteln und Gesteinskörnung
Enduits superficiels d'usure - Méthode d'essai - Partie 1 : Taux d'épandage et régularité
transversale du liant et des gravillons
Ta slovenski standard je istoveten z: prEN 12272-1
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
oSIST prEN 12272-1:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 12272-1:2024
oSIST prEN 12272-1:2024
DRAFT
EUROPEAN STANDARD
prEN 12272-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2024
ICS 93.080.20 Will supersede EN 12272-1:2002
English Version
Surface dressing - Test methods - Part 1: Rate of spread
and accuracy of spread of binder and chippings
Enduits superficiels d'usure - Méthodes d'essai - Partie Oberflächenbehandlung - Prüfverfahren - Teil 1:
1 : Taux d'épandage et régularité transversale du liant Dosierung und Genauigkeit der Verteilung von
et des gravillons Bindemitteln und Gesteinskörnung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 227.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12272-1:2024 E
worldwide for CEN national Members.

oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Determination of the rate of spread of binder . 6
4.1 Principle . 6
4.2 Apparatus . 6
4.2.1 Collectors . 6
4.2.2 Portable balance . 6
4.2.3 Plastic bags . 7
4.2.4 Tape . 7
4.3 Procedure . 7
4.3.1 Preparation of the collectors . 7
4.3.2 Location and placement of the collectors . 7
4.3.3 Removal and weighing of the collectors . 8
4.4 Expression of results . 8
4.5 Test report . 9
5 Determination of the accuracy of spread of binder . 10
5.1 Principle . 10
5.2 Apparatus . 10
5.2.1 Collectors . 10
5.2.2 Portable balance . 10
5.3 Procedure . 10
5.3.1 Preparation of the test apparatus . 10
5.3.2 Location and placement of the apparatus . 10
5.3.3 Removal and weighing of the collectors . 10
5.4 Expression of results . 11
5.5 Test report . 12
6 Determination of the rate of spread of chippings . 13
6.1 Principle . 13
6.2 Apparatus . 13
6.2.1 Box collector . 13
6.2.2 Portable balance . 14
6.2.3 Tray collector . 14
6.2.4 Spring balance with calibrated check masses . 14
6.3 Procedure . 14
6.3.1 Rate of spread with the box collector (see 6.2.1) . 14
6.3.2 Rate of spread with the tray collector (see 6.2.3) . 15
6.4 Expression of results . 15
6.4.1 Expression of results with the box collector (see 6.2.1) . 15
6.4.2 Expression of results with the tray collectors (see 6.2.3) in terms of mass . 16
6.5 Proportional range calculation . 16
6.5.1 Proportional range calculation for box collectors (see 6.2.1) . 16
6.5.2 Proportional range calculation for tray collectors (see 6.2.3) . 17
6.6 Test report . 17
7 Determination of the accuracy of spread of chippings . 18
7.1 Principle . 18
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
7.2 Apparatus . 18
7.2.1 The picking frame (see Annex D) . 18
7.2.2 Portable balance . 18
7.2.3 Sampling bags . 18
7.3 Procedure . 18
7.4 Expression of results . 20
7.5 Test report . 21
Annex A (informative) Determination of the “shoulder to shoulder” rate of spread of
chippings . 22
Annex B (informative) Example of equipment used in the determination of the accuracy of
spread of binder test . 23
Annex C (informative) Determination of the accuracy of spread of binder . 29
Annex D (informative) The picking frame, used in the determination of the accuracy of
spread of chipping test . 31

oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
European foreword
This document (prEN 12272-1:2024) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12272-1:2002.
prEN 12272-1:2024 includes the following significant technical changes with respect to
EN 12272-1:2002:
– greater tolerance on “carpet” surfaces for controlling the binder dosage;
– for aggregates, introduction of weighing of aggregates (English method) in addition to the
“volumetric” dosing box method.
This document 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 and
chippings.
EN 12272-2, Surface dressing – Test methods – Part 2: Visual assessment of defects.
EN 12272-3, Surface dressing – Test methods – Part 3: Determination of binder aggregate adhesivity by the
Vialit plate shock test method.
In this document, the Annexes A, B, C and D are informative.
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
1 Scope
This document specifies test methods for determining the rates of spread and accuracy of spread of
binder and chippings of a surface dressing on a section of road at a given time.
This test method can also be used for determining the rate of spread and accuracy of spread of sprayed
bituminous emulsions e.g. when used as bond coats or asphalt preservation systems. The performance
categories for binder rate of spread and accuracy of spread in EN 12271 do not apply to bond coats and
tack coats.
The test methods are used on site to check the ability of binder sprayers and chipping spreaders to meet
the intended rates of spread and tolerances and coefficients of variation.
The test methods can be used to fulfil the Factory Production Control requirements:
– equipment calibration (EN 12271 – Annex B – Table B2);
– production inspection (EN 12271 – Annex B – Table B6).
The calibration of binder and chipping spreaders requires strict application of the procedures described
in this document.
Using these methods for inspections during production (FPC), allows certain changes to these methods
due to the specificity of certain sites and materials used (e.g. combined chipping-binder spreaders). In
this case, the changes are documented in the Factory Production Control and identified in the test reports.
Other test methods used to check the rate of spread and accuracy of spread of binder, such as the static
spray bar bench test for sprayers, are not covered by this document, although the test methods in this
document can be used for this purpose.
WARNING — The use of this document can involve hazardous operations. This document does not
purport to address all of the safety problems associated with its use. It is the responsibility of the user of
this document to establish appropriate safety practices and determine the applicability of regulatory
limitations prior to use.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
surface dressing
surface treatment consisting of the successive laying of at least one layer of binder and at least one layer
of chippings
3.2
chipping
coarse aggregate within a narrow grading range, practically free of fines
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
Note 1 to entry: Chippings can have specified values for strength, soundness, shape, polishing resistance, resistance
to abrasion, purity, durability and affinity to bituminous binder. Chippings should be washed to achieve the required
fines content.
3.3
rate of spread of binder
2 2
average mass of binder in kilograms per square metre (kg/m ), or average volume of binder in L/m
applied to the road surface when measured in accordance with this document
3.4
rate of spread of chippings
2 2
average bulk volume in litres per square metre (l/m ) or, mass in kilograms per square metre (kg/m )
applied to the road surface, when measured in accordance with this document
3.5
proportional range
difference between the maximum and minimum individual values of rates of spread of binder or
chippings determined divided by the mean value, using the test methods in this document
3.6
accuracy of spread of binder
coefficient of variation of the mass of binder applied to the road surface when measured in accordance
with this document
Note 1 to entry: The value and graph indicate the ability of the sprayer to apply binder evenly across the road
3.7
accuracy of spread of chippings
coefficient of variation of the mass of chippings applied to the road surface when measured in accordance
with this document
Note 1 to entry: The value and graph indicate the ability of the chipping spreader to apply the chippings evenly
across the road
4 Determination of the rate of spread of binder
4.1 Principle
Samples of the binder sprayed by the binder sprayer are collected to determine the average rate of
spread. The minimum total test area shall be 0,5 m with the collectors (minimum x 3) where possible
spaced evenly across the full width of the road to be sprayed.
4.2 Apparatus
4.2.1 Collectors
Collectors shall be of material sufficiently robust to resist deformation in use and be capable of retaining
100 % applied binder.
The sprayer shall achieve a consistent operation before the test commences.
4.2.2 Portable balance
The portable balance shall be, readable to 0,1 g and of sufficient capacity to weigh one tray with 1,5 × the
maximum rate of spread of binder.
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
4.2.3 Plastic bags
Plastic bags or similar, if used, shall be lightweight and capable of containing the binder and collector for
weighing without any loss by leakage or evaporation.
4.2.4 Tape
Adhesive tape can be used, to hold the collectors to the road and to mask them to the required dimensions.
When removed, the adhesive tape shall not damage the masked parts of collectors to ensure there is no
loss in mass of the underlying material.
4.3 Procedure
4.3.1 Preparation of the collectors
Ensure each collector is traceable to its position on the road surface under test. If necessary, mark the
collectors with an indelible identification. Weigh the collectors together with a plastic bag (if used), to the
nearest 1 g and record these masses as the mass of each collector before spraying.
4.3.2 Location and placement of the collectors
Space the collectors 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 collectors to the road during
spraying, measure the length and width of each of the areas exposed to the binder spray to the nearest
5 mm for the calculation of the exposed area.
When the rates of transverse distribution are intentionally different in the same transverse profile then
the collectors related to the same measurement should be placed in areas where the intended rate of
spread is the same.
Care should be taken to ensure that when spray curtains are being used, touching the collectors should
be avoided.
Dimensions in millimetres
Key
1 Spraying direction
2 Edge of spray
3 Trays or other collectors (minimum 3)
4 Area A
i
5 Foam sheet or absorbent material insert
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
6 Thickness (maximum 25 mm)
7 Tape
8 Metal tray
NOTE Dimensions shown are all internal, with a tolerance of ± 2 mm.
Figure 1 — Informative Collectors, diagrammatic
4.3.3 Removal and weighing of the collectors
Within 3 min of the binder being sprayed onto the road, but before any chippings are applied, remove the
collectors from the road surface. Then insert each collector into its own plastic bag, if used, before
weighing it to the nearest 1 g. Care shall be taken not to lose or gain any binder. Weighing shall be carried
out within 10 min unless the plastic bags or similar materials minimize the loss of water from emulsions
or volatiles so that the results are not affected within the tolerances of the test by the time delay before
weighing. Record the mass of each collector and bag, if used, after spraying. The calculation below
2 2
assumes the binder mass in kg/m is known so when measuring rate of spread in L/m this shall be
converted using the density of the binder at spraying temperature.
NOTE Methods to test the residual binder, permitting the water and volatiles to evaporate, can be used
provided a correlation to the immediate test that has been carried out.
4.4 Expression of results
Calculate the binder mass:
MM− M  (1)
i 2i 1i
where:
M is the binder mass retained on the collector, expressed in kilograms (kg);
i
M is the mass of the collector after spraying, expressed in kilograms (kg);
2i
M is the mass of the collector before spraying, expressed in kilograms (kg).
1i
Calculate the rate of spread:
M
i
d = (2)
i
A
i
where:
di is the rate of spread of binder, expressed in kilograms per square metre (kg/m ), for
each collector;
M is the binder mass retained on the collector, expressed in kilograms (kg);
i
A is the area of collector exposed to the binder spray, expressed in square metres (m ).
i
Calculate the mean rate of spread of the binder:
d + d ++d d ++d .d
( )
12 3 45 N
D= (3)
N
where:
D is the mean rate of spread of binder, expressed in kilogram per square metre
2 2
(kg/m ), reported to the nearest 0,05 kg/m ;
=
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
d to d are the rates of spread of binder on each collector;
i N
N is the number of collectors used in the test.
Calculate the proportional range:
dd−
( )
max min
P = (4)
R
D
where:
P is the proportional range;
R
d is the highest rate of spread of binder found on an individual collector;
max
d is the lowest rate of spread of binder found on an individual collector.
min
If the proportional range is greater than 0,20, this indicates the binder spreader is not functioning
properly.
4.5 Test report
The test report shall contain:
a) a statement that the test has been performed in accordance with this document, including its year of
publication (i.e. prEN 12272-1:2024);
b) identification of sprayer and spray bar used;
c) spray bar height;
d) spray bar pressure (if available);
e) spray bar width used;
f) location of site test;
g) date of test;
h) climatic conditions likely to affect the test result (e.g. windy);
i) binder temperature recorded from the tank;
j) binder type (e.g. binder grade);
k) identification of collectors (type, number, total surface covered);
l) specified rate of spread and tolerance;
m) results as calculated in 4.4 (e.g. rate of spread; proportional range);
n) any deviation from the test method;
o) name and signature of the person responsible for producing the test report.
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
5 Determination of the accuracy of spread of binder
5.1 Principle
Binder is collected on a number of collectors which are placed side by side on the road surface, across the
full width, which is to be sprayed, prior to the spraying of the binder. The mass of binder on each device
is then determined from the difference between the masses of the collector before and after spraying the
binder and the arithmetic mean of all these binder masses calculated. This test is also known as the
“Determination of the transverse distribution of binder”.
NOTE Some combined machines do not permit testing across the full width and alternative methods must be
employed. These can be accepted as surrogate methods in factory production control documents.
5.2 Apparatus
5.2.1 Collectors
Collectors, used for sampling the binder, should be made of suitable material. Each shall be able to collect
2 2
0,5 kg/m to 3 kg/m or a minimum of 1,5 × the specified binder rate of spread. Each shall be
dimensionally stable and retain an adequate collecting capacity even after being run over by the wheels
of the spraying vehicle. Each shall also collect the sprayed binder without any loss, overflow or transfer
from one collector to the next.
For the determination of the accuracy of spread of binder, the width of each collector shall be 400 mm,
250 mm, 150 mm, 100 mm or 50 mm and the length of each collector shall be at least 50 mm. The
minimum sample size shall be 100 mm × 50 mm. These dimensions shall be measured to the nearest
0,2 mm for the 100 mm × 50 mm collectors and 1 mm for the 100 mm × 200 mm or larger collectors.
Two types of devices are described in B.1 and B.2, but the latter type is not recommended when spraying
low viscosity emulsions.
5.2.2 Portable balance
The portable balance should be readable to the nearest 0,1 g.
5.3 Procedure
5.3.1 Preparation of the test apparatus
Clearly number or otherwise identify each collector and determine its mass to the nearest 0,1 g in the
case of 100 mm × 50 mm samples or 0,3 g for 100 mm × 200 mm or larger samples. If all the collectors
have a similar mass within a limit deviation of ± 0,3 g only one shall be weighed and this value recorded
for each of them.
5.3.2 Location and placement of the apparatus
The sprayer shall achieve a consistent operation before the test commences. Place the collectors
transversely on the road surface so that the binder is sampled from the full width which is to be sprayed.
5.3.3 Removal and weighing of the collectors
After spraying the binder, remove the collectors from the road surface as fast as practically possible in
order to minimize any loss of water from emulsion binders or volatile substance. This can be
accomplished by using pre-weighed plastic bags or similar to pick up and seal the collectors. Then, within
30 min, determine the mass of each collector with binder to the nearest 0,1 g for samples
100 mm × 50 mm or 0,3 g for samples 100 mm × 200 mm or larger and record the results. This time can
be extended if it can be demonstrated that loss of water or volatiles has not occurred to affect the result
oSIST prEN 12272-1:2024
prEN 12272-1:2024 (E)
within the tolerances of the test. Methods to test the residual binder, permitting the water and volatiles
to evaporate can be used provided a correlation to the immediate test has been carried out.
Care should be taken to ensure that when spray curtains are being used, they are raised to avoid touching
the collectors.
5.4 Expression of results
The collectors at each end of the sprayed width which are empty or only partly filled shall be ignored.
Those remaining shall total number N (see Figure 2).

Key
1 N devices with full rate of spread of binder
Figure 2 — Example with three spray jets overlapping.
Calculate the binder mass collected on each collector, as follows:
MM− M  (5)
i 2i 1i
where:
M is the binder mass retained on the collector, expressed in kilograms (kg);
i
M is the mass of the collector after spraying, expressed in kilograms (kg);
2i
M is the mass of the collector before spraying, expressed in kilograms (kg).
1i
Calculate the arithmetical mean of all the binder masses as follows:
MM++.M
( )
1 2 N
X= (6)
N
where:
X is the arithmetical mean of all
...