Many cold applied products are sold for binding of aggregate under the titles of stabilized aggregate or stabilized decomposed granite (dg). Other products recently introduced now describe themselves as resin pavements, or mimic the NaturalPAVE® registered trademark and describe themselves as natural pavement or natural resin pavement. Having limited bonding strength, these erodible mixtures are marketed without providing pavement performance testing information. Not surprisingly, the end-user is often disappointed by the rapid deterioration of their installation. Specifiers, installation contractors, and project owners should request and review pavement material testing information prior to selecting products for pavement installations.
Dynamic modulus is the main input required for design of Hot Mix Asphalt (HMA) pavements using the nationally recognized AASHTO Mechanistic-Emperical Pavement Design Guide (MEPDG). HMA pavement materials are viscoelastic in nature and their dynamic modulus values vary dramatically in response to changes in loading rate and temperature. For example, HMA materials exhibit much lower dynamic modulus values (significant strength loss) as pavement temperatures increase. In contrast, the impact of changes in loading rate and temperature on the dynamic modulus of the NaturalPAVE XL Resin Pavement material is only moderate and good strength values are retained at all loading rates and temperatures. While retaining viscoelastic behavior, cold-mixed NaturalPAVE XL Resin Pavement materials have the further advantage of gaining strength with additional curing time.
Pendulum Test (E 303)
The test method is based on American Society for Testing and Materials Standard E 303. The pendulum device is a national standard for pedestrian slip resistance testing in at least 49 nations on four continents, which makes it by far the most-accepted method worldwide. Decades of extensive research into slip and fall accidents using the pendulum test method in the United Kingdom, Australia and New Zealand has led to the present safety standards, which are endorsed by the CTIOA.
According to the results of the Pendulum Test (E 303) “The NaturalPAVE XL Resin Pavement surfaces have slip resistance in the same range as conventional broomed concrete and asphalt pavement, both of which are regarded as safe in regards to slip resistance.”
NaturalPAVE materials are classified as flexible pavements, similar to Hot Mix Asphalt, and like asphalt they are installed by asphalt paving machines in continuous joint-free layers. This is in contrast to Portland Cement Concrete pavement, which is classified as rigid pavement and requires the use of expansion joints to control shrinkage cracking.
NaturalPAVE XL Resin Pavement products are a sustainable flexible pavement alternative to Hot Mix Asphalt pavement that provides superior resistance to fuel spills as well as superior pavement materials performance as documented in Marshall Stability, Resilient Modulus and Dynamic Modulus testing conducted in independent pavement materials testing laboratories.