BS EN 13702-2010 pdf download.Bitumen and bituminous binders Determination of dynamic viscosity of modified bitumen by cone and plate method.
This BS EN 13702 specifies a method for determining the dynamic viscosity of a modified bituminous binder over a range of temperatures by means of a cone and plate viscometer. Although the method has been developed for modif,ed binders, it is also suitable for other bituminous binders.
NOTE Unlike penetration grade bitumen, polymer modified bitumens (PMBs) may not show a straight line on the Heukelom-Diagram, This implies that in order to obtain information about the temperature susceptibility of PMBs, viscosity should be measured at different temperatures.
WARNING — The use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It Is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 58. Bitumen and bituminous binders — Sampling bituminous binders
EN 12594. Bitumen and bituminous binders — Preparation of test samples
3 Principle
The sample is placed on a plate, a curie is pressed onto the sample and the system is orought to me test temperature. A stress is applied to the sample by rotation. The torque is measured from the applied shear rate and dynamic viscosity is calculated by:
5 Sampling
Take the sample in accordance with EN 58 and prepare the sample in accordance with EN 12594.
6 Procedure
Select the appropriate size (diameter and angle) of cone to allow measurement at the selected shear rate.
Place the sample on the plate and press the selected cone onto the sample. Remove any surplus sample and bring the system to the test temperature.
Commence the first measurement at the lowest temperature:
Temperature: (60 ± 0.5) ‘C;
— Shear rate: 5 x 10.2 s1.
Check the reading after a delay of 15 mm when reaching the temperature and note the temperature, the cone size, the shear rate and the reading.
Repeat the test and calculate the result as an average of two tests.
Replace the specimen and increase the temperature to the next test temperature. Commence the second measurement:
— Temperature: (100 ± 0,5) ‘C;
Shearrate: 5x101s.
Replace the specimen and increase the temperature to the next test temperature. Commence the third measurement:
— Temperature: (150±1,0)’C;
— Shear rate: 5 x l0 s.
It should be ensured that the complete specimen has reached the test temperature before starting the test.
The sample should not contain any filler.
NOTE In addition to these test temperatures and shear rates any other temperature and shear rate can be used.
7 Expression of results
Record the results of the measurement of dynamic viscosity with the corresponding shear rate and the test temperature.
Express the viscosity values in Pa• s as follows: (1,000 x lox) Pa s.
8 Precision
NOTE The followrng precision data are the best currently estimated and are proposed until results of further round robin tests are available.
8.1 Repeatability
The difference between two successive results, obtained by the same operator with the same apparatus under constant operating conditions on identical test material would, in the long run, in the normal and correct operation of the test method, differ by more than 5 % in only one case in twenty.
8.2 Reproducibility
The difference between two single and independent results, obtained by different operators working in different laboratories on identical test material would, in the long run, in the normal and correct operation of the test method, differ by more than 15 % in only one case in twenty.
9 Test report
The test report shall contain at least the following information:
a) type and complete identification of the sample under test;
b) reference to this European Standard;
c) temperature, shear rate and the result of the test (see Clause 7);
d) diameter and angle of the cone;
e) date of the test;
f) any deviation, by agreement or otherwise, from the specified procedure.BS EN 13702-2010 pdf download.