This study presents the findings of an effort to develop a test either for detecting the presence of amine-type antistripping (as) agents in asphalt or, when desired, quantitatively measuring the agent's concentration in asphalt. Four asphalts and two amine-type commercial antistripping agents, each asphalt and agent being from a different source, were used in the study. An astm procedure for quantitative measurement of amines in an organic solution was modified to allow direct measurement of the quantity of amine-type antistripping agents in asphalt . As part of the procedure, the additive is titrated directly with an acid, without first having to be extracted from the asphalt. The procedure is simple, requires relatively inexpensiveequipment, and, with little further modification, may possibly be used to do field testing. This paper appears in transportation research record no. 1228, Asphalt mixtures and asphalt chemistry.
Samenvatting