What is the drainage blanket for beneath PFA when used as a fill material?
The UKQAA recommends a drainage blanket beneath PFA when used as a fill material because PFA, like any fine grained material, will tend to draw water from the ground beneath by capillary suction. This water will rise to ~600mm and may cause stability problems in thin layers of fill. However, where thick layers of PFA, say >2m, are to be used it has been shown that this layers can be removed and a stable fill be be achieved. The Specification for Highway Works requires a 6D granular fill as a starter layer beneath PFA fill. For more details see Technical Datasheet No.2.
Related Questions
- Compact fluorescent lamps contain mercury, a hazardous material, incandescent bulbs do not. If more compact fluorescent lamps are used, does it not mean more mercury pollution in the EU?
- What is the drainage blanket for beneath PFA when used as a fill material?
- What material is the used for Mousepads and what is the print area?
