DEAS 928-2:  2018
ICS 87.040
 
© EAC 2018                                                                                                                              First Edition 2018 
 DRAFT EAST AFRICAN STANDARD 
Hot applied thermoplastic road marki ng paint - Part 2: Specific ation for 
road performance 
EAST AFRICAN COMMUNITY DEAS 928-2: 2018 
ii © EAC 2018 – All rights reserved
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 DEAS 928-2: 2018 
© EAC 2018 – All rights reserved  iii
 Foreword 
Development of the East African Standards has been necessitated  by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered  when goods and services are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committ ee (EASC) mandated to develop and 
issue East African Standards (EAS).  The Committee is composed of representatives of the National 
Standards Bodies in Partner States, together with the represent atives from the public and private sector 
organizations in the community.  
East African Standards are developed through Technical Committe es that are representative of key 
stakeholders including government, academia, consumer groups, p rivate sector and other interested parties. 
Draft East African Standards are circulated to stakeholders thr ough the National Standards Bodies in the 
Partner States. The comments received are discussed and incorpo rated before finalization of standards, in 
accordance with the Principles and procedures for development o f East African Standards.  
East African Standards are subject to review, to keep pace with  technological advances. Users of the East 
African Standards are therefore expected to ensure that they al ways have the latest versions of the standards 
they are implementing .  
The committee responsible for this document is Technical Commit tee EASC/TC 070, Paints, varnishes and 
related products.   
Attention is drawn to the possibility that some of the elements  of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any o r all such patent rights. 
During the preparation of this Standard, reference was made to the following document: 
……………………………………………. 
Acknowledgement is hereby made for the assistance derived from this source. 
  DRAFT EAST AFRICAN STANDARD DEAS 928-2: 2018
 
© EAC 2018 – All rights reserved 1
 Hot applied thermoplastic road mark ing paint - Part 2: Specific ation for 
road performance  
1 Scope  
This Draft East Africa Standard prescribes the performance requ irement for thermoplastic material which have 
been melted and applied on road su rfaces by spray, screed or ex truded. 
2 Normative references  
The following documents are referred to in the text in such a w ay that some or all of their content constitutes 
requirements of this document. For dated references, only the e dition cited applies. For undated references, 
the latest edition of the refer enced document (including any am endments) applies. 
CD/K/05:2018, Road marking paints — Specification 
CD/K/6:2018, Hot applied thermoplastic road marking paint — Specification, Part 1: Constituent material and 
mixtures  
ISO 4618, Paints and varnishes — Terms and definitions 
ISO 591-1, Titanium dioxide pigments for paints — Part  1: Specifications and methods of test 
EN 1423, Road marking materials — Drop on materials — Glass beads, antiskid aggregates and mixtures of 
the two 
ISO 11664-2, Colorimetry — Part 2: CIE standard illuminants  
3 Terms and definitions  
For the purposes of this document, the following terms and defi nitions apply. 
3.1 
aggregate 
a granular material of mineral composition, such as calcite, qu artz or flint, used to provide bulk of 
thermoplastic road marking material. 
3.2 
binder  
a thermoplastic resinous material which, with any included oils  or other plasticizers provide adhesion to the 
road surface and cohesion between the other components. 
3.3 
extender 
a powder added to assist the dispersion of the pigment and impa rt body to the mixture. DEAS 928-2: 2018 
2 © EAC 2018 – All rights reserved
 3.4 
luminance factor 
the ratio of the luminance of a reflecting surface in a given d irection to that of the ideal white diffusing surface, 
when viewed in same direction and illuminated in the same way, expressed as a percentage. 
3.5 
retroreflectivity 
the property of some material such as solid glass beads, to ref lect incident light in direction close to the 
direction from which it came. 
3.6 
thermoplastics 
a solvent-free marking substance supplied in block, granular or  powder forms. It’s heated to a molten state 
and then applied with appropriate hand or mechanical applicator . It forms cohesive films by cooling 
3.7 
thermoplastic road marking material 
a material consisting of aggregate, pigment, binder, glass bead s and extenders, capable of being softened by 
heating and hardened by cooling, which is used for road marking . 
4 Designations 
Road marking material whose properties remain in accordance  wi th clause 5.2 for  a minimum of two years 
after laying shall be designated as class A, for a minimum of o ne year but less than two years shall be 
designated as class B material. 
5 Performance requirement 
5.1 Material 
5.1.1 White material 
The white material and its constituents shall meet the requirem ent of CD/K/6:2008. The white material shall 
conform to the requirements of clause 5.2. 
5.1.2 Yellow material 
The yellow material and its constituents shall meet the require ment of CD/K/6:2008. The yellow material shall 
conform to the requirements of clause 5.2. 
5.1.3 Surface applied glass beads 
Surface applied glass beads shall comply with class B requireme nts of EN 1423 and shall be applied at 
suitable rate to provide specified retroreflectivity. 
5.1.4 Laying of the material 
The application of the material and shall be in accordance with  annex B. DEAS 928-2: 2018 
© EAC 2018 – All rights reserved  3
 5.2 Requirement for the laid material 
5.2.1 Luminance factor 
The luminance factor for the test area on each of the non-refle ctorized beaded stripes tested in accordance 
with CD/K/6:2008 shall be 50 ± 2 yellow pigments not less 70 % white paints. 
5.2.2 Degree of erosion  
When tested in accordance with Annex A the total wear Index for  the test area on each stripe shall not exceed 
35 % at each of the regular inspection. 
5.2.3 Spread of markings 
When tested in accordance to CD/K/5:2008 the width of each stri pe, measured between 600 mm and 900 mm 
from the near Kerb, shall not have increased, at each of the re gular inspection intervals by  more than 10% of 
its initial value. 
5.2.4 Retroreflectivity 
When tested in accordance with Annex C, the retroreflectivity o f each stripe with surface applied beads shall 
be not less than 1000 mcd / (1x m2) . 
5.2.5 Skid resistance 
When tested in accordance with Annex D, the skid resistance for  the test area on each surface beaded stripe 
for reflectorized materials and each stripe of non-reflectorize d materials measured at a distance of 650 mm ± 
50 mm from the nearest kerb shall not be less than 45 on the da y of application of the material after a period 
of not less 1 h and shall not be less than 45 at each of the re gular inspection intervals. 
  
 
 DEAS 928-2: 2018 
4 © EAC 2018 – All rights reserved
 Annex A 
(normative) 
Determination of degree of erosion 
 
A1 Principle 
Erosion of the surface of each of the paint stripes is assessed  by reference to a rating system from which a 
‘Wear Index’ may be determined. 
A2 Procedure 
A2.1 Preparation of Test Area 
Mark on each of the reflectorized and non-reflectorized strips the extremes of the test area, which shall be 750 
mm ± 50 mm and 1250 mm ± 50 mm, measured from the near side ker b. 
Thoroughly wet the test area with one litre of clean water and,  using a brush, brush the area evenly to 
dislodge superficial dirt. Rinse the area with a further one li tre of clean water and remove the surface water 
with a soft sponge. 
A2.2 Assessment of wear  
A2.2.1 On-site assessment 
Immediately after preparing each test area, position the test g rid as shown in Figure A1. Assess the degree of 
paint erosion of each of the 20 grid squares according to the r atings as defined in Table A.1 and record the 
number of squares in each grade. (The tabular form shown in Table A.2  is recommended.)  
Table A.1 — Assessment of rating of grid squares 
Grade  
 Area of paint remaining  Weighting factor  
a Greater than or equal to 75 % X 1 
 
b Greater than or equal to 50 % and 
less than 75% X 2 
c Greater than or equal to 25 % and 
less than 50 % X 3 
 
d Less than 25 % 
 X 4 DEAS 928-2: 2018 
© EAC 2018 – All rights reserved  5
 Table A.2 — Specimen ‘wear index’ table 
Grade Number of squares Weighting factor Wear index 
a  X  1  
  
b  X  2  
  
c  X  3  
  
d  X  4   
 Total: 20  Total: 
 
If skid marks or other non-erosion characteristics make it diff icult in the opinion of the assessors to obtain an 
assessment of a grid square, ignore the affected square and, af ter recording the results of those squares 
which can be assessed, the grid shall be moved to include new s quares in order to bring the total number up 
to 20. Up to eight new squares may be used in the position and sequence given in Figure A2 but assess only 
one new square for each square that cannot be assessed with the  grid in the original position. Calculate the 
‘wear index’ by multiplying the number of squares in each grade  by the respective weighting factor for that 
grade and add together the four s ubtotals to give the total ‘we ar index’. 
Compare the results of the five assessors and discard the highe st and lowest results and calculate the mean 
of the remaining results. 
If the value of the mean is in excess of 35 carry out the proce dure described in A2.2.2. If the value of the 
mean is not in excess of 35, report the values obtained from th e on-site assessment as the total ‘wear index’. 
A2.2.2  Measurement on Photographs  
Photograph the test area with grid in position with a 35 mm cam era using a 50-mm lens and monochromatic 
film. Hold the camera on a trip od at a distance between 750 mm and 800 mm above the test area. 
Enlarge the photograph of the test area of the marking to half actual size. Assess the area of marking 
remaining within each of the 20 grid squares as depicted in the  enlarged photograph with area analysis 
equipment, which is based on the magneto scription technique. 
Trace with the stylus of the equipment around each area of erod ed marking; that is, those areas, which are 
not substantially, white, within each of the 20 grid squares. C alculate the percentage of marking remaining 
within each grid square using the relationship 100- (% eroded).  Grade each of the grid squares as defined in 
Table A.1 and record the number of squares in each grade. (The tabular form shown in Table A.2 is 
recommended). Calculate the tota l ‘Wear Index’ as described in A2.2.1. 
Report the value obtained from the measurements made on the pho tographs as the total ‘Wear index .  
  
 
  
 DEAS 928-2: 2018 
6 © EAC 2018 – All rights reserved
 Nearside kerb. 
 
 
Figure A.1 —Grid mesh  
 
a) The location of the test grid on a road marking (each grid s quare is approximately 50 mm X 50 mm). 
 
 
 
Figure A.2 — Grid mesh 
 
 
 
 
  
  
  
 
DEAS 928-2: 2018 
© EAC 2018 – All rights reserved  7
  
Annex B 
(normative) 
 
Laying and examination of material 
B.1 Conditions for application of marking material 
Apply marking material in stripes of 100 mm ±10 mm in accordanc e with B.2  to the road surface that is free 
from moisture and loose particles at the following condition an d temperature and humidity. 
a) Air temperature: 10 ˚C and 25 ˚C. 
b) Relative humidity: Not greater than 85 %. 
c) Road surface temperature not more than 40 ˚C. 
Apply the stripes in a single pattern of the left hand lane of the carriageway transverse to its length. 
B.2 Procedure 
B.2.1  Apply two stripes of the material on the surface using commerc ial stripping equipment to give a stripe 
having a thickness as follows: 
a) for synthetic resin binders: For screed and extruded lines 2 .5 mm ± 0.5. 
b) For sprayed lines: 2.0 mm ± 0.5mm 
c) for products containing Gum or Wood resin binders: 3.00 mm ±  0.5.   
B.2.2  Place metal sheets of dimension, minimum thickness 1.5 mm and minimum dimensions 300 mm long 
and 50mm wider than the line being laid. One at the beginning o f the run and the other at the end. Verify the 
thickness in accordance to CD/K/5:2008. 
B.2.3  Measure the width of each stripe to an accuracy of ± 2 mm at f ive points equally placed along the 
stripe and calculate the mean value. 
B.2.5 Apply to the Road surface two str ipes of each material to be su rface beaded. Before the material dries 
apply solid glass beads evenly to each stripe. Determine the th ickness of each stripe in accordance to B.2.2 
and measure the width of each stripe in accordance to B.2.3. 
NOTE  The beads should be applied by machine. 
A.2.6  After a period of 12 months from the dates on which the initia l tests were conducted, retest the stripe 
in accordance with B.2.2 and Annex C as appropriate. 
 
 DEAS 928-2: 2018 
8 © EAC 2018 – All rights reserved
 Annex C 
(normative) 
 
Determination of retroreflectivity of laid stripes 
C.1 Standard measuring conditions 
The coefficient of retroreflected luminance, R L of the coefficient of a field of a road marking shall be 
determined by: 
RL= L/E Unit: mcd.m-2.lx-1. 
Where: 
L is the luminance factor of the field under illumination by a single light source at a relatively small angular 
separation from location which the Luminance is Measured:mcd.m-2. 
E is the illuminance created by light source at the field on a plane perpendicular to the direction of 
illumination; unit lx. 
C.1.1  In the standard measuring conditions, the directions of measur ement and illumination define a plane 
perpendicular to the plane of the field. The observation angle a (the angle between the central measuring 
direction and the plane of field) is 2.29˚ and the illumination angle ϵ (the angle between central illumi nation 
direction and the plane of the field) is 1.24.The measuring fie ld shall be illuminated by a Standard Illuminant A 
as defined in ISO 11664-2, 
C.1.2  The total angular spread of the measuring directions shall not  exceed 0.33˚C. The total angular 
spread of the measuring directions shall not exceed 0.33˚ in the parallel plane to the plane of the field of road 
marking and 0.17˚ in the plane containing the direction of measurements of illum ination. 
C.1.3  The measure field of the road marking shall have a minimum are a of 50 cm2.For some profiled Road 
markings, with considerable spacing between the profiles, the t otal measured field shall be long enough to 
include at least one such spacing. The most reliable result is obtained when the total length includes an exact 
multiple of spacing. All of the measured field shall be illumin ated with uniform Illuminance. 
C.1.4 Procedure 
Calibrate the instrument in accordance with manufacturer’s inst ructions. 
C.1.4.1 Take the measurements only on a dry and, where necessary, dry t he test area before test.  
C.1.4.2 Take five measurements a round a point within 200 mm of where t he test stripe would be bisected by 
an imaginary centre line and record the result. 
C.1.5 Expression of result 
Calculate the arithmetic mean of five readings taken and expres s this in mcd  / (lx.m-2) to the nearest whole 
numbers as the retroreflectivity of the stripe. DEAS 928-2: 2018 
© EAC 2018 – All rights reserved  9
 Annex D 
(normative) 
Determination of Skidding resistance 
D.1 Apparatus 
D.1.1 Portable skid resistance tester 
D.2 Test area 
Mark on the Stripe the extremes o f the test area, at a distance  of 650 mm ± 50 mm and 3150 mm ± 50 mm 
from the nearside white edge-line. 
D.3 Procedure 
Calculate the arithmetic mean of five readings taken and expres s this in (mcd / lx.m-2), to the nearest whole 
numbers, as the retrorefle ctivity of the Stripe. DEAS 928-2: 2018 
10 © EAC 2018 – All rights reserved
  
Bibliography 
[1] KS 2157-2:2018, Hot applied Thermoplastic Road Marking pain t — Specification Part 2: Specification for 
road performance 
 
  
 
 
  
 
 DEAS 928-2: 2018 
 
© EAC 2018  – All rights reserved