Department for Transport, Energy & Infrastructure Business Management System SA -

– Pavements & Structures Section Technical and Professional Services Section Business Management System

Materials Group

Asset Technology Operations Procedure - Laboratories

BINDER CONTENT BY IGNITION METHOD

MAT-TP473

Revision: 1.521Date: February 2006Nov 04Mar 03Page 1 of 10

TRANSPORT SA

MATERIALS TECHNOLOGY SECTION

BINDER CONTENT BY IGNITION METHOD

Binder Content by Ignition Method

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Transport SA

Quality Management System

Department of Planning, Transport & Infrastructure

Field Services Section

Technical Services Group

Procedure

Binder Content by Ignition Method

TP473

Revision: 1.10Date: May 2012 Page 1 of 10

Technical Services98NovemberJanuary119

1.0SCOPE

This procedure describes a method for the preparation and determination of the binder content of asphalt samples by the ignition method and is complementary to oven manufacturers instructions.

2.0REFERENCES

ASTM D6307-98, -, Standard Test Method for Asphalt Content of Hot Mix Asphalt by Ignition Method.

AS 2891.1. - Method of Sampling and Testing Asphalt, Standards Australia, AS 2891.1-1986. – Method of Sampling and Testing Asphalt.

AS 2891.2.1 - Sample preparation/mixing, quartering and conditioning of asphalt in the laboratory,

Standards Australia, AS 2891.2.1-1985. – Sample preparation/mixing, quartering and conditioning of asphalt in the laboratory.

AS 1141.11.1.- Particle size distribution by dry sieving, Standards Australia, AS 1141.11.1-1996. – Particle size distribution by dry sieving.

3.0DEFINITIONS

Nil.

4.0APPARATUS AND MATERIALS

  • •Laboratory balance: range 1 to 10kg + 0.1g.
  • •Ovens and other mixing equipment as per AS 2891.2.1.
  • •Ignition oOven specifically designed for incineration and capable of maintaining temperatures up to and above 580o C. The oven shall not emit any smoke (or ignition by-products) during the ignition process. The oven manufacturers installation instructions must be conformed with.

The oven may or may not be fitted with an inbuilt electronic balance and data collection system.

5.0SAMPLE PREPARATION AND CALIBRATION

5.1Calibration

Initial preparation by determining the aggregate calibration factor.

5.1.1.The ignition process occurs at a sufficiently high temperature to cause mass losses in the constituent aggregates and fillers in the asphalt mix. This additional mass loss occurs across aggregate types, source location and individual mix design components. It can be compensated for by applying an empirically determined algebraic calibration factor to the total mass loss of the sample.

5.1.2.Ensure the mix design aggregate components have been dried according to

AS 2891.2.1-1995.

5.1.2.5.1.3.Set the furnace temperature to 560oC, (this assumes that the furnace temperature rises by approximately 60oC during the ignition process when the burn temperature is 500oC).

5.1.3.5.1.4.Prepare a sample of the blended binderless mix with the same aggregate composition as the mix to be tested.

5.1.4.5.1.5.Determine and record the mass of the sample tray (or tare the balance).

5.1.5.5.1.6.Determine the mass of the sample and record the initial mass, (mi),. (The mass should be nominally 1500g).

5.1.6.5.1.7.Heat the sample and tray to approximately 105oC before placing it in the ignition oven.

5.1.7.5.1.8.Heat the aggregate calibration sample in the furnace to 560oC for at least 20 minutes (or until the mass does not vary by more the 0.1g over three consecutive one minute intervals if using an inbuilt balance).

5.1.8.5.1.9.After removal from the oven allow the sample to cool to approximately room temperature then measure and record the mass of the sample after firing, (mf) in g.

5.1.10Calculate the measure percentage mass lost (CF1) as follows:

Where cF1 = the measured mass loss of the calibration sample (%).

mi =the mass of the aggregate before ignition (g).

mf =the mass of the aggregate after ignition .(g).

5.1.11Repeat the above steps for two aggregate calibration samples. The reported dry calibration factor (or Blank Value BV) is the average of these two results, ie

BV = CF1 + CF2

2

NOTE:

Note: Individual aggregates from mixes can have their measured mass losses performed. The mass loss of any combination of these individual aggregates can then be calculated.

5.2.Preparation of saamples

5.2.1.The asphalt mixes to be tested for binder content using the ignition oven can be either cores, unlaid production mixes or prepared laboratory samples.

5.2.2.If the sample mass is greater than the recommended amount as advised by the oven manufacturer it shall be split by coning and quartering on a heated table after the sample has been heated to approximately 105oC and separated.

5.2.3.Weigh the sample in a clean dry tray and record the initial mass, (mi) (refer to the manufacturers instructions as to the recommended asphalt mass limits for to oven).

5.2.4.Spread the sample evenly over the ignition tray ensuring that all asphalt particles have been transferred.

5.2.5.According to the manufacturers instructions, go through the ignition routine from pre-heating to the final timed ignition phase. Set the temperature on 700oC. This procedure is the same as that used to determine the mass loss of the binderless mix as described in 5.1 except for the lower temperature.

.

5.2.6.Remove the sample from the oven and allow it to cool to approximately room temperature. Measure and record the mass (mf) of the sample after carefully transferring it from the ignition trays to a tared tray.

6.0CALCULATIONS

The Binder Content (BC) can then be calculated as follows:

where bc= the binder content of the asphalt mix (%).

M= the mass of the asphalt mix before ignition (g).

Mf= the mass of the asphalt mix after ignition (g).

BV= the average measured mass loss of the calibration sample (%).

7.0PRECISION

The uncertainty of measurement has been determined as + x.x of the test result, at a confidence limit of 95% with a nominal coverage factor of 2, when calculated in accordance with the accreditation requirements as detailed in AS/ISO 17025.No precision data available.

8.0REPORTS AND DOCUMENTATION

Report Nil.form MAT-TP473-1

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File Location: Q:/Quality Management, N:/Intranet & N:/Internet

Department of Planning,for Transport Energy & Infrastructure

SA

Asset Materials Technology TAPS, 19 Bridge Road, Walkley Heights Ph (08) 8260 0230 SA 5098 Section

, G

19 Bridge Road, Walkley Heights, Phone 82600230, PO Box Box 1533,82, WalkervilleEnfield PlazaAdelaide SA 508015

MaterialsTechnical Services Group

Procedure - Laboratories, Telephone: 8260 0230 Enfield Plaza, SA 5085

BINDER CONTENT BY IGNITION METHOD

TSA-MAT-TP473 / AST-04

Date: ...... Tested By: ...... …......

Job No: ...... Client: ...... …......

SAMPLE
NO. / LAB. NO.
WH- / INITIAL Mi
MASS (g) / FINAL Mf
MASS (g) / CALIBRATIONLOSS ON IGNITION
FACTOR (%) BV / BINDER
CONTENT (%)

% Binder Content

where Mi is the initial mass (g)

Mf is the final mass (g)

BV is the calibration loss on ignition (%)

BC is the binder content (%)

Comments......

Calculated by: ………………………. ______Checked by: ………………………. ______Date: ……………______

Form TSAMATTP473-1, Revn. 1..52110987

Date :...... Tested By : ......

Job No. :...... Client : ......

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Transport SA

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