BS EN 13075-1:2012 pdf download – Bitumen and bituminous binders — Determination of breaking behaviour Part 1 : Determination of breaking value of cationic bituminous emulsions, mineral filler method
1 Scope
This European Standard specifies a method for the determination of the breaking value of cationic bituminous emulsions. 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 to determine the applicability of regulatory limitations prior to use.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable 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 3 Terms and definitions For the purposes of this document, the following term and definition applies.
3.1 breaking value dimensionless number corresponding to the amount of reference filler, in grams, needed to coagulate 100 g of bitumen emulsion
4 Principle
A reference filler is added at a uniform rate to a specified quantity of stirred cationic bitumen emulsion. When the 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.
NOTE The cationic or anionic nature of an emulsion can be determined by EN 1430 [1].
5 Reagents and materials
5.1 Reference filler
The Sikaisol filler 1) shall be used as the reference filler (the characteristics of which are given in Annex A). Other fillers such as the Forshammer filler may be used as an alternative to the Sikaisol filler. In the event of dispute, the Sikaisol filler shall be used.
5.2 Cleaning agents, as used conventionally in laboratories.
6 Apparatus
6.1 General
Usual laboratory apparatus and glassware, together with the specific equipment described below, depending on the procedure used (semi-automatic or manual). An explanatory sketch of the equipment set-up is shown in Figure 1 for the semi-automatic procedure.
6.2 Equipment for semi-automatic procedure
6.2.1 Stirrer motor, as shown in Figure 1, with an output power of at least 25 W, and a speed of (260 ± 60) r/min.
6.2.2 Stirrer, as shown in Figure 2, having the dimensions given in Figure 3, Figure 4 and Figure 5.
In Figure 3, the dimensions are given as an example.
6.2.3 Metal cans, cylindrical, of approximate capacity of 500 ml, height of 95 mm and diameter of 90 mm.
6.3 Equipment for manual procedure
6.3.1 Enamelled or stainless steel dish, with approximately 20 cm inside diameter and height of 10 cm .
6.3.2 Spatula, nickel or stainless steel, approximately 20 cm long.
6.4 Equipment for both procedures
6.4.1 Oven, capable of being maintained at (110 ± 5) °C.
6.4.2 Conical-shaped funnel, capable of supplying a continuous sufficient flow of filler to the filler feeder.
6.4.3 Adjustable filler feeder, to be placed at the outlet of the filler holding funnel and capable of feeding the filler at a rate ranging from 0,25 g/s to 0,45 g/s. This equipment shall be calibrated. The calibration shall be achieved 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.
NOTE The feeding rate, q , in g/s, should be calculated, using Formula (1):
m f is the mass of filler in grams;
t is the analysis time in seconds.
6.4.4 Timer or stop watch, with an accuracy of 0,2 s or better over a time interval equal to or higher than 200 s.
6.4.5 Bottles, of approximate capacity of 500 ml, made of a material that will not react with the emulsion and having tight fitting lids.
6.4.6 Constant temperature bath and/or climatic chamber, capable of maintaining the sample in the bottle (6.4.5) at (25 ± 1) °C.
NOTE If the bath is used to condition the emulsion sample bottles, it should be equipped with a frame or device to prevent the plastic bottles from moving in the water bath.