BS/EN 1429-2013 pdf download.Bitumen and bituminous binders Determination of residue on sieving of bituminous emulsions, and determination of storage stability by sieving.
The aqueous solutions (5.1) and (5.2) may be replaced by aqueous phases of the same ionic structure as the emulsion under test.
5.1 SolutionSa
Aqueous phase solution of nominal 0.01 molfI of sodium hydroxide (NaOH) containing a nominal 1 % mass fraction sodium oleate. This solution, or the actual aqueous phase, may be used for the preparation of anionic emulsion samples.
5.2 SolutIon Sr
Aqueous phase solution of nominal 0,01 moL/l of hydrochloric acid (HCI) containing a nominal 1 % mass fraction cetyltrimethylammonium bromide. This solution, or the actual aqueous phase. may be used for the preparation of cationic emulsion samples.
The solution of 1 % of cetyltrimethylammonium bromide should be prepared slightly above 25 CC (but not higher than 30 CC). Then It should be stored at a temperature of (25 ± 1) CC before test.
5.3 Efficient rinsing agent
Suitable solvent rinsing agents shall be used.
5.4 Ethanol
96 % minimum or methylated spirit 99 %.
6 Apparatus
Usual laboratory apparatus and glassware, together with the following:
6.1 Sieve, conforming to ISO 565, stain’ess steel or brass, with a frame diameter within the range of 75 mm to 100 mm and a mesh size of 0,500 mm,
6.2 SIeve, conforming to ISO 565, stainless steel or brass, with a frame diameter within the range of 75 mm to 100 mm and a mesh size of 0,160 mm.
6.3 Sieve pans. of corresponding diameter.
6.4 Balance, of sufficient capacity. capable of weighing to the nearest 1 g.
6.5 Balance, of sufficient capacity. capable of weighing to the nearest 0,01 g.
8 Procedure for the determination of residue on sieving
8.1 General
Carry out the procedure under normal laboratory conditions between 18 C and 28 .
8.2 Residue on the 0,500 mm sieve
8.2.1 Wash the 0,500 mm sieve (6.1) with rinsing agent (5.3) and then with ethanol or methylated spirit (5.4).
8.2.2 Place the sieve on the sieve pan (6.3) and dry in the oven (6.12) for not less than 1 h.
8.2.3 After drying, allow the sieve and the sieve pan to cool within the desiccator (6.13).
8.2.4 Weigh the sieve and the sieve pan together. Record the mass, m,, to the nearest 0,01 g (6.5).
8.2.5 Wet the sieve cloth with solution Sa (5.1) or Sc (5.2) as appropriate.
8.2.6 Drain the sieve thoroughly and place it on a funnel (6.14) which is mounted over the bottle (6.10).
8.2.7 Weigh the container (6.11) and record the mass, m, to the nearest 1 g (6.4).
8.2.8 Weigh (1 000 ± 5) g of emulsion into the container and record the mass of emulsion, mL. to the nearest 1 9 (6.4).
8.2.9 Pour the emulsion through the wetted sieve and allow draining completely.
Discard the first 30 ml or 40 ml of the tittered emulsion, in order to avoid any possible modification in the properties of the emulsion resulting from the action of the Sa or 5, solution.
Clear as much as possible the container of the emulsion and reweigh the container. Record the mass. n. R to the nearest I g (6.4).
If the emulsion does not pass through the sieve in 5 mm at normal laboratory conditions, it is permitted to deviate from this procedure by pre-heating and testing the laboratory sample at (60 ± 5) °C and/or by diluting the emulsion with either Sd solution (5.1) or S, solution (5.2) as appropriate, in order to determine residue on sieving. If a dilution is performed, an amount of (500 ± 5) g, weighed to the nearest 1 g (6.4), of S or S. solution shall be used.
It heating is required, all precautions should be taken to minimize water loss and/or skin formation during this operation.
In case dilution is performed. adequate adaptations of the procedure and of calculations shall be performed and documented in the test report. Except for the determination of the residue on the 0,160 mm sieve (8.2), the filtered emulsion shall not be used for any other emulsion test.
8.2.10 Remove the bottle containing the filtered emulsion, and stopper it.
NOTE The emulsion filtered in this way will be used to carry out the second part of the test (see 8.3. when required) and. it not diluted, to carry out all other tests on the emulsion.
8.2.11 Place the sieve on a tunnel which is mounted over a 250 ml conical flask (6.8). Wash the residue on the sieve with solution S or S, until the washings run clear. Finally wash with water.
8.2.12 Drain the sieve thoroughly and place it on the sieve pan. Dry In the oven (6.12) for at least 2 h and then cool in the desiccator (6.13) for about 30 mm.
8.2.13 Weigh the sieve with its sieve pan and residue and record the mass, rn,, to the nearest 0,01 g (6.5).
8.3 Particles between 0,500 mm and 0,160 mm
8.3.1 Wash the 0,160 mm sieve (6.2) with rinsing agent (5.3) and then with ethanol or methylated spirit (5.4).
8.3.2 Place the sieve on the sieve pan (6.3) and dry in the oven (6.12) for not less than 1 h.
8.3.3 After drying, allow the sieve and the sieve pan to cool in the desiccator (6.13).
8.3.4 Weigh the sieve and the sieve pan together. Record the mass, to the nearest 0,00 1 g (6.6).
8.3.5 Wet the sieve cloth with solution Sa (5.1) or S. (5.2) as appropriate.
8.3.6 Drain it thoroughly and place it on a tunnel which is mounted over a 250 ml conical flask (6.8).
8.3.7 Gently stir the emulsion that was filtered through the 0,500 mm sieve (see 8.2.10).
8.3.8 Place the 200 ml conical flask (6.7) on the balance and weigh into it 50 g. of filtered emulsion to the nearest 1 g (6.4), then add approximately 50 cm3 of the 5,, or S solution.
In case the emulsion has been diluted for determining the residue on the 0,500 mm sieve (8.2.9), weigh into the conical flask (6.7) 75 g. of filtered emulsion to the nearest 1 g (6.4) and add approximately 25 cm3 of the S or S, solution.
8.3.9 Gently stir the diluted emulsion.BS/EN 1429-2013 pdf download.