AS 2341.30 pdf download – Methods of testing bitumen and related roadmaking products Method 30: Recovery of residue from bituminous emulsion

AS 2341.30 pdf download – Methods of testing bitumen and related roadmaking products Method 30: Recovery of residue from bituminous emulsion
1 Introduction
The water phase of a bituminous emulsion is evaporated from a weighed sample on a hotplate to recoverthe binder phase for further testing.The test is carried out under an inert atmosphere to minimizebinder hardening during evaporation.
This method is applicable to bituminous emulsions used in the construction and maintenance ofpavements (as specified in AS 1160).
This method may also be used to determine the residue from evaporation of a bituminous emulsion,if specified.
2Scope
This document sets out a procedure for the recovery of the residue from a bituminous emulsion forfurther testing. It also provides a means by which the residue from evaporation of a bituminousemulsion can be determined.
WARNING一THE USEOFTHIS DOCUMENT MAY INVOLVEHAZARDOUSMATERIALS,OPERATIONSAND EQUIPMENT.THIS DOCUMENT DOES NOT PURPORT TO ADDRESS ALL OF THE SAFETYISSUES ASSOCIATED WITHITSUSE.ITISTHERESPONSIBILITYOF THE USER OFTHISDOCUMENTTO ESTABLISH APPROPRIATE SAFETY AND HEALTH PRACTICES,AND TO DETERMINE THEAPPLICABILITY OF REGULATORY LIMITATIONS PRIOR TO USE.
3Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document.
NOTE Documents referenced for informative purposes are listed in the Bibliography.AS 1160,Bituminous emulsions for the construction and maintenance of pavements
AS/NZS 2341.1，Methods of testing bitumen and related roadmaking products,Part 1: Precision data—Definitions
AS/NZS 2341.21，Methods of testing bitumen and related roadmaking products,Method 21:Sample preparation
4 Terms and definitions
For the purpose of this document, the terms and definitions in AS/NZS 2341.1 and the following apply.4.1
may
indicates the existence of an option4.2
shall
indicates that a statement is mandatory
4.3
should
indicates a recommendation
5Reagent
A 2:1 by volume mixture of methylated spirits and water.
NOTE Domestic grade methylated spirits has been found to be suitable.
6Apparatus
The following apparatus is required:(a)
Balance,with a minimum capacity of 250 g, readable to at least 0.1 g, with a limit ofperformance not exceeding 0.3 g.
(b)
Inert gas delivery system consisting of a carbon dioxide gas bottle (food grade) with pressureregulator, connected by flexible tubing through a 500 mLglass gas washing bottle to a nozzleof glass tubing having an internal diameter of about 6 mm.The gas nozzle shall have thedelivery end bent through approximately 180° so that it may be hooked over the side of themetal container and extended down the inside about 50 mm.
NOTE 1 The purpose of this apparatus is to direct the flow of gas down the inside of the container toform a non-oxidizing atmosphere without hindering the escape of volatile matter.
NOTE2 Another inert gas, e.g.nitrogen (food grade), may be used.
(c)
Hotplate, with variable temperature control.
d)
Wire gauze (optional).
(e)
Container, metal with an open top, up to 1 L capacity.
NOTE3 A food can having a diameter of appropriately 75 mm and a depth of appropriately 105 mmhas been found to be suitable.
(f
Shallow dish, to hold cooling water.
(g)
Tongs or thermally insulated gloves, to hold the metal container.
(h)
Stirrer, suitable for the containers used, such as a metal spatula or glass rod.
(i
Digital infrared thermometer, which is readable to at least 1 C and accurate to at least ± 5 °C,and able to measure temperatures in the range between 20 and 200 °℃.
7 Procedure
The procedure shall be as follows:(a)
Prepare the bituminous emulsion sample for testing in accordance with AS/NZS 2341.21.
(b)
Place the stirrer into the container and weigh the container and stirrer on the balance (A).
(c)
Tare the balance with the container and stirrer and add about 60 g of the bituminous emulsionsample. Record the mass of bituminous emulsion added to the container (M).