How does a Permeable interlocking concrete pavement stack up against pervious concrete or porous pavement (asphalt)?
Permeable interlocking concrete pavement (PICP), because it is factory-manufactured, has a consistency in quality, can be mechanically installed, can be installed even in freezing temperatures, and is immediately traffic-ready. Pervious concrete and porous pavement is delivered to the jobsite in a plastic state. This makes them subject to weather and other conditions. PICP can be installed in freezing weather, however the other pavements cannot. In above freezing temperatures, plastic asphalt and concrete mixes must be regularly checked by the contractor for consistency and conformance to specifications. These plastic materials impose time limits within which the contractor must work and perform before the asphalt cools and the concrete cures and stiffens. The time and temperature constrained materials rely on a high degree of site control in order to achieve a successful installation. In contrast, PICP units are manufactured in a factory and delivered to the site. They are not subject
