An optimized setup for determining the bitumen content in asphalt concrete by the neutron reflection method |
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| Authors: | Z Idiri K Dekali S Bedek L Omari A Amokrane M Belamri A Azbouche |
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| Institution: | (1) Centre de Recherche Nucléaire d’Alger, 02 Bd Frantz Fanon, B.P. 399 Alger-Gare, Algiers, Algeria;(2) CTTP, Gué de Constantine, Alger, Algeria;(3) Centre de Recherche Nucléaire d’Alger, 02 Bd Frantz Fanon, B.P. 399 Alger-Gare, Algiers, Algeria;(4) Centre de Recherche Nucléaire d’Alger, 02 Bd Frantz Fanon, B.P. 399 Alger-Gare, Algiers, Algeria;(5) Université des Sciences et de la Technologie, Houari Boumediene , Bab Ezzouar, Alger, Algeria;(6) Centre de Recherche Nucléaire d’Alger, 02 Bd Frantz Fanon, B.P. 399 Alger-Gare, Algiers, Algeria;(7) Centre de Recherche Nucléaire d’Alger, 02 Bd Frantz Fanon, B.P. 399 Alger-Gare, Algiers, Algeria |
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| Abstract: | Summary A setup was developed in order to determine the bitumen content in asphalt concrete by neutron reflection. The main parts of this setup are an Am-Be neutron source of 37 GBq and a 3He neutron detector. To avoid geometrical effects of the measurements, the optimum volume of the samples was determined by plotting the reflected neutron response versus the sample volume. For the calibration of the system, the American Standard Method (ASTM) was used when preparing aggregate and asphalt concrete samples. The method was then compared to the conventional chemical method by analyzing unknown samples taken from an asphalt comcrete producing plant and finally the method was assessed in terms of reproducibility, sensitivity and precision. |
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