Are there any “controls” that we should not test with such as bitumens, temperatures, aggregates, additives, etc.?
What are some Specific IntegraBase tests and their expectations? Resilient Modulus – Expect a doubling at 40 deg. C at a lower rate of loading – tripling is not out of the question. Marshall Stability – Typically a 25-30% increase Indirect tensile Strength – Tensile strength at higher temps usually doubles Wheel Tracking – 40 Deg C, half of the depth of the track of the control Stripping – We are always better with wet strength. IntegraBase tends to lose a higher percentage after soaking (retained strength ratio), but looking at it relatively, IntegraBase still has a higher wet strength both before and after soaking when compared with an unmodified sample. Are there certain aggregates or bitumens to be cautious about? Hydrophillic aggregates should be looked at carefully, as they would be with any unmodified mix. Paraffinic asphalts can be very difficult to work with. These types of asphalts will crystallize at low temperatures – this can be worse than cracking. Again, the same can be
