BS EN 13074-2-2011 pdf download.Bitumen and bituminous binders Recovery of binder from bituminous emulsion or cut-back or fluxed bituminous binders Part 2: Stabilisation after recovery by evaporation.
WARNING — The use of this document may involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. The hazards associated with the use of this method have been assessed using cut-back bitumen containing 10 % kerosene and 90 % 160/220 penetration grade bitumen and were found low enough to be acceptable. However it Is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references. only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12594. Bitumen and bituminous binders — PreparatiOn of test samples
EN 13074-1, Bitumen and bituminous binders — Recovery of binder from bituminous emulsion or cut-back or fluxed bituminous binders — Part 1: Recovery by evaporation
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
recovered binder
material remaining alter the treatment of a bituminous emulsion or a cut-back or fluxed bitumen under the conditions specified in EN 13074-1
3.2
stabflised binder
binder free from most of the volatile part of its flux oils, obtained from recovered binder by heating at 85 C for 24 h under the conditions specified according to this method
4 Principle
A thin layer ot recovered binder from a bituminous emulsion or a cut-back or huxea bituminous product is
stabilised for 24 h at 85 °C in a ventilated oven.
5 Apparatus
Usual laboratory apparatus and glassware. together with the following:
5.2 Ventilated oven, at least 80 I internal volume, capable of maintaining a temperature of (85 ± 2) °C around the sample and in which the level of the shelves has been checked.
It is acceptable to use the same oven for both the recovery step (EN 13074-1) and the stabilisation step provided that this oven is capable of maintaining around the sample the specified temperatures. In case the same oven is to be used for both steps, the sample may be left in the oven during the period of temperature adjustment (from 50 DC as specified in EN 13074-1 up to 85 °C). provided this period does not exceed 1 h.
6 Procedure
6.1 Stabilisation of the binder
Stabilisation of the recovered binder shall take place immediately after the recovery procedure (EN 13074-1).
Put the p4ate with the recovered binder in the oven (5.2) and leave it for (24 ± 1) h at (85 ± 2) °C. If there are several plates, introduce them simultaneously. The binders should not be grouped when their volatile parts might be of different natures. Arrange the plates in such a way that air circulation is not hindered. Air circulation has to be effective on each side of each plate.
At the end of the specified period, remove the plate(s) from the oven.
6.2 Removal and storage of the stabilised binder
Collect without any delay the stabilised binder from the plate(s) using an appropriate tool but without applying any extra heat to the sample. To facilitate the removal of binders from the non-stick material, it may be necessary to cool the plates in a refrigerator or freezer.
The stabilised binder from all the plates of the same sample shall be placed in a same sample container.
If the stabilised binder is required for further testing at a later date, it shall be stored for as short a time as possible. but no longer than 28 days. in a sealed container and stored at a temperature lower than 28 °C.
NOTE When stonng the stabihsed binder, a period as short as possible should be favoured (ii possible less than one week). Specific storage conditions (use of inert gas. e.g. nitrogen) are recommended, especially in cases where storage time exceeds 1 week
6.3 Homogenisatlon of the stabilised binder and preparation of the sample for further testing
Before performing further testing on the stabilised binder, the binder from each plate shall be homogenized by mixing. It the sample of recovered binder comes from more than one plate, the binder from the whole plates shall be blended. Heating of the stabilised binder shall be strictly in accordance with EN 12594. When possible, the preparations for further testing shall be carried out immediately after homogenising the stabilised binder to avoid reheating.BS EN 13074-2-2011 pdf download.