NatraTex asphalt surface courses use a clear synthetic binder mixed with aggregates to produce an attractive, low maintenance and durable area. Aggregates used in the creation of NatraTex products include flint gravels and high skid resistant stone ranging from 6mm to 10mm.
The majority of NatraTex products are supplied in hot format and are laid in the same way as conventional black asphalt. In this article, we’ll look at the installation process for NatraTex to help you learn more about this popular surfacing material from BituChem.
NatraTex Installation
Preparation
The surface onto which NatraTex is installed should be strong enough to bear the construction of the new surface without deformation. This should be taken into account at the design stage with consolidation, movement or settlement of the foundation considered.
As well as this, all equipment must be clean to avoid contamination of the materials, which can lead to discolouration of the finished surface
To prepare the surface, a bond coat should be applied to the prepared surface to prevent it separating from the binder course. The bond coat should be given sufficient time to cure, otherwise bleeding can occur, which can contaminate the surface, and a clear joint and edge sealant should be applied to all raised iron works and kerbs prior to laying.
We strongly recommend that NatraTex is machine laid, if possible, especially for Heavy Duty applications.
Compaction
NatraTex should be installed in accordance with BS594987:2015, the standard for asphalt for roads and other paved areas. Installation should be avoided if standing water, snow or ice is present, or wet weather is forecasted for the day.
When NatraTex has been laid, the surface must be compacted as soon as possible while the material is above 140C using a steel wheel, tandem, and vibratory rollers. It is important to be aware that thinner layers of the surface course will cool quicker, while wind chill can significantly accelerate the cooling process. When the temperature of the surface falls below 140C, it will become more difficult to work.
Drying Time
The drying time for NatraTex surfacing can vary depending on weather conditions, product density and use. We recommend leaving the surface untouched by either traffic or footfall for at least 12 hours prior to reopening. Or, in the summer months when temperatures are higher, we’d suggest leaving the surface overnight until the whole course has fully cooled.
Maintenance And Aftercare
NatraTex products are very low maintenance, making them ideal for a range of applications and sectors.
For quick and easy repair of NatraTex surfacing, we developed NatraTex ColdLay. This is ideal for areas where small repairs are required following raised ironworks or bollard replacement, for example. If hot material is required, consideration should be given to quantities needed and travel time to ensure there’s enough workable material to complete the works.
While NatraTex is extremely hard wearing, should it become soiled from spillages or debris, a citrus cleaner (not a solvent based cleaner) can be used to remove marks.
Learn More About NatraTex
If you would like to learn more about NatraTex, please contact us. We are on hand to provide additional guidance around the installation and maintenance of NatraTex through our CPD sessions. What’s more, should you wish to use NatraTex for an upcoming project, we can recommend a list of competent, reputable contractors who are familiar with the placement of NatraTex.
