BS EN 13075-1:2012 pdf download

BS EN 13075-1:2012 pdf download.Bitumen and bituminous binders – Determination of breaking behaviou rPart 1: Determination of breaking value of cationic bituminous emulsions, mineral filler method.
6.4.7 Balance, having a suitable range, capable of weighing the samples in Clause 8 to the nearest 0,1 g.
6.4.8 Thermometer, having a suitable range, capable of measuring the temperature to the nearest 0.2 C.
7 Sampling
The test matenal shall be sampled in accordance with EN 58 and shall be prepared in accordance with
EN 12594,
8 Procedure
8.1 General
Carry Out the procedure under normal laboratoiy condItions (18 C to 28 C). Before performing either of the two procedures however, ensure the following (preparatory) steps are taken:
— dry the quantities of filler, required for the lest, in the oven (6.4.1) at a temperature of (110±5) t until constant mass and cool to ambient temperature in a desiccator;
– pour a portion of emulsion (250* 10) g into a bottle (6.4.5) end secure the lid;
— pour the required quantities of filler ii a container and close the container:
— place the bottle with the emulsion and the container with the filler in the constant temperature bath or climatic chamber (8.4.6) for a minimum of 1.5 h;
— transfer the requfred quantity of flier from the container into the hopper of the adustab4e filler feeder.
8.2 Semi-automatic procedure
Weigh the metal can (6.2.3) containing the stirrer (6.2.2) to the nearest 0,1 g (nil).
Transfer approximately (100 ± 1) g. weighed to the nearest 0.1 g (ni.) of the emulsion sample from the bottle
(6.4.5) to the weighed metal can.
Place the metal can under the stirrer motor (6.2.1) and connect the stirrer (6.22)10 the stirrer motor.
Start the stirrer motor, the filler addition and the timer simultaneously, ensuring that the stirrer blades rotate at (260±60) rlmin and are below the surface of the emulsion during the test.
Rotate the metal can slowly (approximately 5 rImln) by hand m the opposite direction to the stirrer in order to ensure homogeneity of mlxmg.
The mixture becomes thicker as the filler is added. The emulsion is considered broken when the mix comes off completely (or substantially) from the metal can. Turn off the filler feeder, the timer and the stirrer at this point.
Weigh the metal can containing the broken emulsion and the stirrer to itie nearest 0.1 g (ms).
Repeat the test with a second portion of emulsion taken from the same bottle using a second metal can and stirrer
NOTE In case or c5spute, oiVy the sem..aulomaled apparatus is allowed
8.3 Manual procedure
Weigh the dish (6.3.1)containlng the spatula (6.3.2) to the nearest 0.1 g (ni’).
Transfer approximately (100 t 1) g, weighed to the nearest 0,1 g (me) of the emulsion samp’e from tne ootli (6.4.5) to the weighed dish containing the spatula.
Start the filer addition and the timer simultaneously. Thoroughly mix the emiision and the tiller by stirring at a steady rate of 1 ris, using the spatula
The mixture becomes thicker as the f1llr is added. The emulsion is considered broken when the mix comes off completely (or substantially) from the dish. Stop the filler addition, the timer and the mixing at this point. Weigh the dish containing the broken emulsion and the spatula to the nearest 0,1 g (“2).
Repeat the test with a second portion of emulsion taken from the se bottle using a second dish and spatula.
9 Calculation
Calculate the breaking value, B, for 1009 of emulsion, using Formula (2);
10 Expression of results
Express the individual breaking values to the nearest integer.
Express the result as the arithmetic mean of the two individual results of the breaking value, to the nearest
integer.
11 Precision
NOTE The precision of the method was evaluated in accordance with EN ISO 4259121.
11.1 Repeatability, r
The difference between two successive test results, obtained by the same operator wth 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, exceed 10 % of the mean value in only one case in twenty.
NOTE The fonner French standard NF T66-017 (manual procedure) mentioned a repeatability value determined with the Sikaisol mler equal to 3,0%. under the condeons specified in this standard 3J.
11.2 Reproducibility, R
The reproducibility for this European Standard is currently no1 available.