Various regions in the world that use ASTM D3381 Standard Specification for Viscosity Graded Cement have difficulty meeting Table 2 specifications. For example asphalts manufactured with South American crudes tend to have difficulty meeting the TFO (Thin Film Oven) aged ductility minimum requirement. These types of asphalts are better suited to meet AC-30 Table 1 specifications from the perspective of production capability and pavement quality. The addition of the type viscosity grade AC-30 would fill in an obvious gap in Table 1 without changing its intent. Data supporting the need for AC-30 in the Table 1 specification are summarized in the Table below and graphically represented in Figure 1. TFO residue ductility versus viscosity at 60C data from various South American crude sources were chosen to represent this need as ductility appears to be the most significant limiting parameter with respect to ASTM D 3381 Table 2.
Date Initiated: 02-16-2009
Technical Contact: Robert Kluttz
Ballot: D04 (09-01)
Status: Ballot Item Approved
Ballot: D04.40 (09-01)
Status: Item Going To Next Ballot Level