Recycling of construction materials is environmentally conscientious in a number of ways. Eliminating the need to mine and refine new materials for the work is just the first benefit. In-place recycling also eliminates the need to haul materials to the site; reducing transportation pollution and road congestion near the work site. This benefit is doubled when you consider that the torn up road materials must also be hauled away for reprocessing or disposal.
Cold In Place Recycling (CIR) was enabled by advances in grinding equipment. What normally takes place at a recycling plant can now happen at the project site as part of the repaving process. Rather than stripping the road surface bare, the upper two to four inches of existing asphalt concrete pavement are pulverized in place and mixed with asphalt emulsion, then graded and compacted just like new asphalt concrete.
The use of road repavers has been an economical alternative to off-site, materials reprocessing for several decades, typically reducing the cost to ½ that of hauled in replacement materials. Now, with heightened awareness toward “Green” technologies, municipal governments have been mandated to look at low carbon footprint alternatives where possible. The use of CIR fits this requirement perfectly.
Max Machinery’s 240 Series of helical flow meters are the leading choice for measuring the low flow rate, high viscosity and high temperature asphalt emulsion stream used within the repaving machines. The 240 Series of helical rotor meters offer a rugged, low pressure drop method of precisely metering and controlling the blending of the emulsion with the aggregate stream. The high resolution and repeatability of the Max meter makes it possible to continually verify the on-the-fly ratio so that every foot of the road meets the engineering specs.