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This paper presents the properties of an SMA LA (stone matrix asphalt Lärmarmer)
mixture based on the polymer-modified binder PMB 45/80-55, formed by the addition of zeolites
(synthetic zeolite type Na-P1 and natural zeolite—clinoptilolite). The compositions of the SMA 11,
SMA 8 LA and SMA 11 LA mixtures based on modified bitumen with PMB 45/80-55 (reference
mixture) or PMB 45/80-55 with Na-P1 or clinoptilolite were determined. Their resistance to
permanent deformation, water sensitivity, water permeability and susceptibility to changes in
texture and skid resistance during the period of use were verified. Adding zeolites reduced the
production temperature by as much as 15 °C for the SMA 11 LA mixtures and 20 °C for SMA 8 LA.
The addition of zeolites did not significantly affect the resistance to permanent deformation, the
water permeability or the mass loss. The mixtures with clinoptilolite were resistant to the harmful
effects of water, while the mixtures with Na-P1 proved more sensitive to water. Water permeability
tests showed a higher permeability for SMA 11 LA compared to SMA 8 LA due to the higher
nominal aggregate size. The Cantabro test showed greater particle loss for SMA 11 LA than for SMA
8 LA. A skid resistance and macrotexture analysis indicated that the SMA LA layers required special
maintenance on the road due to the clogging of pores in the mix structure.
