Specifications
System Installation
Porous Paving Solutions - System Installation
Guide for writing specifications
- Excavate the required area to a depth of approx 100mm
- Install 60 or 70 mm of 10-14mm blue metal, level and compact
- Ensure that base gravel is dry throughout
- Place in cement mixer appropriate quantity of the required aggregate (generally ranging from 65kg to 82kg). Start rotating the bowl.
- Mix Part A with Part B thoroughly for 2 minutes (Ratio 69% part A to 31% part B, by weight)
- When mixing, ensure that the material is mixed thoroughly, including sides and base of vessel
- After initial mixing, leave to rest for approx 1 minute, then give a short stir for approx 1 minute. Pour mixed resin solution into the cement mixer.
- The porosity of different types of aggregate is one of the determining factors in setting the ratio of resin to aggregate weight.
- Allow to mix thoroughly until all aggregate has been coated with the resin mix
- Pour mixed material over sub-base allowing 100mm clearance from tree collar.
- After lightly compacting, smooth to the exact level of surrounding pavement or pavers.
- Fill tree collar area with either a weaker mixture of resin or Porous Paving Solutions soft collar.
- Fence site with barricades and webbing to allow to set overnight.
Caution:
PPS resin mix, when unbonded, is corrosive. Wear protective clothing, gloves and goggles while working with the product. Avoid contact with skin, eyes and clothing. Observe safety instructions. Once set, PPS resin system is safe and completely inert.
Do not install PPS resin system in temperatures below 15 degrees Celsius. Generally you want to avoid working with sub base material which is significantly colder than the PPS resin aggregate. The chemical reaction is an exo thermic reaction resulting in increased temperature of the PPS Resin. PPS Resin may draw moisture out of the sub base, even when the blue metal appears to be dry, which may cause the PPS Resin surface to develop a ‘bloom’ ie a milky white appearance.
To avoid this, heat the base gravel with a gas burner to about 20 degrees Celsius. Furthermore, in cold conditions it would be advantageous to heat the bowl of the mixer. Under cold climatic conditions, avoid pouring PPS Resin System after 1pm.