EN 14023-2010 pdf download.Bitumen and bituminous binders – Specification framework for polymer modified bitumens.
NOTE 1 Each country w11 then have a particular selection of specifications, which, if regulated, are covered in Tables I and 2 and which, if commonly used by industry, are covered Mi Table 3. It is useful for each country to publish in a national guidance document for each applicadon, their requirements for polymer modified bitumens from Table 1, Table 2 and Table 3. The appropriate class for each technical requirement or application is selected in turn and the selection of classes should be made from past experience of successful use, on a regional basis, in order to avoid unworkable combinations.
NOTE 2 In order to assist in using the tables, an example has been provided in Annex A.
5.2.2 ConsIstency at Intermediate service temperatures
Consistency at intermediate service temperature for polymer modified bitumens shall comply with the requirements for penetration at 25 °C in Table I. The grades are designated by the nominal penetration range at 25 DC.
5.2.3 Consistency at elevated service temperatures
Consistency at elevated service temperature for polymer modified bitumens shall comply with the requirements for softening point as indicated in Table 1.
Polymer modified bitumens are supplied for a variety of end uses in various climatic conditions; consequently the specifications include a wide range of softening point values.
NOTE The various softening point limits are included so as not to prevent some traditional methods used to evaluate the suitability of modified bitumens in the different European climatic conditions (for more information refer to national guidance documents).
As the grading system is based on the consistency at intermediate and elevated service temperatures, values shall be given for these characteristics.
5.2.4 Brittleness at low service temperature
Brittleness at low service temperature may be required to meet specific regional conditions. Where required, polymer modified bitumens shall conform to the requirements for Fraass breaking point in Table 2.
For some highly modified polymer modified bitumens, Fraass breaking point is not a suitable low temperature method and, in that case, low temperature elastic recovery at 10 °C shall be used.
5.2.5 Cohesion
The property of cohesion is included as a means of differentiating polymer modified bitumens from paving grade bitumens. Three different test methods are included in Table 1: force ductility, tensile test and Vialit pendulum. These reflect the different characteristics that can occur with polymer modified bitumens and are not considered to be equivalent. It is intended that the most appropriate cohesion test method shall be used in each case, at the discretion of the supplier. The manufacturer shall state the test method used.
One cohesion method shall be chosen based on end application. Vialit cohesion (EN 13588) shall only be used for surface dressing binders.
5.2.6 Durability — Resistance to hardening
Resistance to hardening shall be tested after conditioning in accordance with the Rolling Thin Film Oven Test (RTFOT) (see EN 12607-1).
The main test is the RTFOT at 163 °C. For some highly viscous polymer modified bitumens where the viscosity is too high to provide a moving film it is not possible to carry out the RTFOT at the reference temperature of 163 C. In such cases the procedure shall be carried out at 180 °C in accordance with EN 12607-1.
NOTE In order to assist in controlling rutting deformation and cracking of asphalt mixes, optional tests and dasses, for measurements on material after the hardening procedure, are given in Table 3. The choice will depend upon climatic conditions, traffic and local use.
Resistance to hardening is not appropriate for surface dressing bitumens.
5.2.7 StraIn recovery
Strain recovery may be required to meet specific regional conditions. Where required, polymer modified bitumens shall
conform to the requirements for elastic recovery at 25 °C or 10 °C in Table 2.
5.2.8 Other properties
5.2.8.1 Informative characteristics
The framework specifications include a table of informative characteristics (see Annex B) based on new test methods that are under validation. Producers of polymer modified bitumens are invited to supply data from these measurements to the client on a voluntary basis. It is hoped that the data so gathered will be of assistance in developing performance- related specifications in the future.
5.2.8.2 Flash point
The flash point shall be determined by the Cleveland open cup method in EN ISO 2592 for normal specification purposes.
NOTE The Pensky-Martens closed cup method (see EN ISO 2719 [61) can be used to investigate possible contamination but is likely to give lower values.
5.2.8.3 Density
Where required, density shall be determined in accordance with EN 15326.EN 14023-2010 pdf download.