BS EN 13075-1:2012 pdf free.Bitumen and bituminousbinders – Determination ofbreaking behaviour Determination of breaking valueof cationic bituminous emulsions, mineralfiller method.
BS EN 13075-1 The following documents，in whole or in part,are normatively referenced in this document and areindispensable for its application.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
Terms and definitions For the purposes of this document, the following term and definition applies.
breaking value:dimensionless number corresponding to the amount of reference filler, in grams, needed to coagulate 100 g ofbitumen emulsion.
A reference filler is added at a uniform rate to a specified quantity of stirred cationic bitumen emulsion. Whenthe emulsion has broken completely, the amount of added filler is determined by weighing. The mass of filler(in grams) multiplied by 100 and divided by the amount of emulsion (in grams) is the breaking value.
Usual laboratory apparatus and glassware, together with the specific equipment described below, dependingon the procedure used (semi-automatic or manual). An explanatory sketch of the equipment set-up is shownin Figure 1 for the semi-automatic procedure.
Conical-shaped funnel, capable of supplying a continuous sufficient flow of filler to the filler feeder.
Adjustable filler feeder, to be placed at the outlet of the filler holding funnel and capable of feedingthe filler at a rate ranging from 0,25 g/s to 0,45 g/s. This equipment shall be calibrated.The calibration shall beachieved by weighing the amount of the filler poured during a period of time between 100 s and 200 s,measured with an accuracy of 0,2 s.
Carry out the procedure under normal laboratory conditions (18 °C to 28 °C).Before performing either of thetwo procedures however, ensure the following (preparatory) steps are taken:
dry the quantities of filler, required for the test, in the oven (6.4.1) at a temperature of(110±5) ℃C unti constant mass and cool to ambient temperature in a desiccator;
pour a portion of emulsion (250±10) g into a bottle (6.4.5) and secure the lid;-pour the required quantities of filler in a container and close the container;
place the bottle with the emulsion and the container with the filler in the constant temperature bath orclimatic chamber (6.4.6) for a minimum of 1,5 h;
transfer the required quantity of filler from the container into the hopper of the adjustable filler feeder.8.2Semi-automatic procedure
Weigh the metal can (6.2.3) containing the stirrer (6.2.2) to the nearest 0,1 g (mi).
Transfer approximately (100 ±1) g, weighed to the nearest 0,1 g (me) 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(6.2.2) to 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 rlmin) by hand in the opposite direction to the stirrer in order toensure homogeneity of mixing.
The mixture becomes thicker as the filler is added.The emulsion is considered broken when the mix comesoff completely (or substantially) from the metal can.Turn off the filler feeder, the timer and the stirrer at thispoint.BS EN 13075-1 pdf download.