Determination of dynamic viscosity of modified bitumen
BS EN 13702-1-2003 pdf free.Methods of test for petroleum and its products BS 2000-513: Bitumen and bituminous binders – Determination of dynamic viscosity of modified bitumen- Part 1: Cone and plate method (Identical with IP 513- 2004).
This European Standard 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 modified binders, it is also suitable for other bituminous binders.
NOTE Unlike penetration grade bitumen, polymer modified bétumens (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 may 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
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the app4’opriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 581). Bitumen arid bituminous binders – Sampling bituminous binders.
EN 12594, Bitumen and bituminous binders — Preparation of test samples.
The sample is placed on a plate. a cone is pressed onto the sample and the system is brought to the 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:
where γ is the shear rate in s
NOTE The advantages of this method are the use of a very small sample and the speed of the method, especially regarding thermal conditioning of the specimen.
Cone and plate viscometer, with the fllowing minimum capabilties:
range of shear rate:5×10*s to5x10^s;
range of viscosity:5x 102 Pa.s to 105 Pa.s;
range of temperature: 60 C to 150 C;
the sample temperature shall be maintained within士0,5 C upto 100 C and士1,0 C above 100 C.
Take the sample in accordance with EN 58 and prepare the sample in accordance with EN 12594.
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 C+0,5 C;
Check the reading after a delay of 15 min when reaching the temperature and note the temperature, cone size,speed and 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
Temperature: 100 C+0,5 C;
Shear rate: 5×10 s.
Replace the specimen and increase the temperature to the next test temperature. Commence the third measurement:
Temperature: 150 C+1,0 C;
Shear rate: 5x102s.
NOTE 1 It should be ensured that the complete specimen has reached the test temperature before starting the test.
NOTE 2The sample should not contain any fller.
NOTE 3In 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 10w) Pa.s
NOTE The following precision data are the best currently estimated and are proposed until results of further round robin tests are available.
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.
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) the type and complete identification of the sample under test:
b) a reference to this European Standard;
C) the temperature, shear rate and the result of the test (see clause 7);
d) diameter and angle of the cone:
e) the date of the test;
f) any deviation, by agreement or otherwise, from the specified procedure.BS EN 13702-1 pdf download.Determination of dynamic viscosity of modified bitumen