BS EN 12607-2:2000 pdf free.Methods of test for petroleum and itsproducts — BS 2000-460.2: Bitumenand bituminous binders — Determination of theresistance to hardeningunder the influence ofheat and air — TFOT method ( Identical with IP 460.2:2000).
Take all necessary safety precautions and ensure that the test sample is representative of thelaboratory sample from which it is taken (see EN 58).Ensure that the laboratory sample ishomogeneous and is not contaminated (see EN 1425).
Prepare the test sample in accordance with EN 12594.Remove sufficient quantity of the laboratorysample to perform tests to establish the characteristics to be measured on the bituminous binderbefore and after the TFOT hardening test, if necessary using a warmed knife, and transfer it to asuitable container.
The sample shall be free of water.Heat the sample in its container with a loosely fitted cover in anoven to a fluid condition not exceeding 10 °C below the test temperature, for the minimum timenecessary to ensure that the sample is completely fluid.Homogenize the sample by stirring.
Determine the initial characteristics of the bituminous binder using an appropriate test method,according to the grade in question, e.g. the kinematic viscosity at 60°℃(EN 12595)，.
Ensure that the oven (4.1) is level so that the shelf rotates in a horizontal plane with a maximum tiltduring rotation of not more than 3° from the horizontal. Determine the temperature of the oven withthe specified thermometer (4.2) in a vertical position at a point equidistant from the centre and theouter edge of the shelf and the bottom of the thermometer bulb approximately 6 mm above the topof the shelf.
Weigh separately metal containers (4.3) to the nearest 1 mg reading (Mo).
Pour 50,0 g ± 0,5 g of the sample into each of two or more of the containers. Allow the samples tocool to room temperature and weigh them separately to the nearest 1 mg(M.).
With the oven at the test temperature ±1 °C, rapidly place the containers with the sample on thecircular shelf, close the oven, and commence rotating the shelf.Maintain the sample in the oven for5 h from the time the test temperature reaches 1 C below the test temperature. Ensure that thetotal time that a sample is in the oven is not more than 5 h 15 min.At the end of the heating period,remove the samples from the oven.
Cool to room temperature, weigh to the nearest 1 mg,(M), and calculate the change in mass ofthe bituminous binder in each container.BS EN 12607-2 pdf download.