WRAP launches offer for U.K. aggregates assessment.The United Kindgom's Waste & Resources Action Programme (WRAP) has launched a bid invitation to carry out a Life Cycle Assessment of Aggregates. The purpose of the work is to develop a Life Cycle Inventory and Assessment for aggregates produced from both primary and recycled resources. The study should also make a comparison between processing options for aggregates for unbound unbound said of electrolytes, e.g. iron and calcium, and other substances which are circulating in the bloodstream and are not bound to plasma proteins so that they are available immediately for metabolic processes. See also calcium, iron. applications, aggregates for concrete and aggregates for asphalt asphalt (ăs`fôlt, –fălt), brownish-black substance used commonly in road making, roofing, and waterproofing. Chemically, it is a natural mixture of hydrocarbons. . The resources to be assessed are: * Igneous rocks igneous rock: see rock. igneous rock Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). ; * Sedimentary rocks (Geol.) See See also: Sedimentary ; * Sand and gravel deposits; * Recycled unbound inert waste Inert waste is waste which is neither chemically or biologically reactive and will not decompose. Examples of this are sand, drywall, and concrete. This has particular relevance to landfills as inert waste typically requires lower disposal fees than biodegradable waste or hazardous ; * Recycled concrete; and * Recycled asphalt. The study will cover all aspects of extraction and processing of primary resources in the U.K. through to the point of their dispatch as aggregates. It should also investigate issues such as the excess production of fines where sales and production are out of balance. Washing processes that enable the further processing of fines and other aggregate sizes are to be considered for both primary and recycled resources, in addition to conventional screening and crushing. The report should also assess the relative proximity of sources of primary aggregates and recycled aggregates to the market place and disposal options for inert inert /in·ert/ (in-ert´) inactive. in·ert adj. 1. Sluggish in action or motion; lethargic. 2. construction and demolition debris. Additional information is available online at www.wrap.org.uk. |
|
||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion