Many accessible publications (Iwahski, 2003; Judycki and Jaskula, 1999, Little and Epps, 2001) on the use of hydrated lime as an additive to asphalt mixtures have pointed out its positive effect. Apart from a substantial increase in water and frost resistance arising from an improvement in the binder adhesion to the aggregate, an increase in resistance to permanent deformation may also be noticed.
Hydrated lime is distinguished by its strong mixture-stiffening properties at high temperatures. It should be kept in mind that, according to Rigden, voids in hydrated lime can be very large. In connection with that, one should not exceed the standard content of lime in an asphalt mixture, usually accepted as 1.0-1.5% of the aggregate mass. Such an addition of lime will benefit the mixture without the risk of overstiffening.
According to EN 13034, ready-made filler containing hydrated lime is called a mixed filler.
