Construction waste, disposal, regulations and management plan. How to manage construction or demolition waste.
In fact, most of theconstruction site wastecould give a certain profit: the recycling of construction waste is an underestimated practice due to various prejudices, however therecycling of construction site wasteit could bring social, ethical and economic benefits.
Composition of building waste
Waste from construction or demolition of building works, the so-called waste from C&D, are generally made up of inert fractions (concrete, bricks, ceramics, excavated earth) which can easily bereused.
Today, unfortunately, most of theconstruction site wasteit is disposed of in landfills or even illegally abandoned. The average composition of the rejection fromCDproduced in Italy, sees these materials:
- 10% non-reinforced concrete
- 20% reinforced concrete
- 50% brick
- 5% asphalts
- 6% excavated material
- 2.5% wood, paper, plastic
- 3% metal
- 3.5% miscellaneous
The reported data were provided by the Veneto Regional Agency for Environmental Prevention and Protection.
Construction waste, the legislation
Construction waste is governed by the D.M. 5/2/98 and subsequent amendments (Decree n. 186 of 5/4/2006). The cited regulations contain all the indications to recover theconstruction and demolition waste. These regulations are accompanied by the Ministerial Decree 8/5/2003 n. 203 on Green Public Procurement which provides for the obligation to cover the annual needs of manufactured goods and goods by the public and companies with prevalently public capital with arecycled materialsnot less than 30%.
The GPP standard (Green Public Procurement)requires, among other things, public administrations to prefer the use of recycled materials in the event of tenders for public works.
Recycling of construction site waste
When it comes torecyclingorrecoverygodsconstruction wastewe Italians are far behind compared to other European countries. The demolitions, in Italy, are not yet organized at the end ofrecoverysome materials. The UNI Construction Commission does not lack one guide to selective demolition so as to separate the materials more carefully, directly during the demolition phase.
With careful separation, not only the production of waste is reduced but thewaste from C&Dproducts.
If an ad hoc demolition is not carried out, the recovery operations of thebuilding wastethey are certainly daunting (they cost a lot and are difficult), which is why it is necessary to select and pre-select the materials.
This is why we speak of selective demolition techniques. This practice provides for the separation of the different fractions of demolished materials so as to allocate theconstruction wasteto therecycling.
The more homogeneous the building material is, the greater will be its yield and its reuse, always in the building sector.
For theselective demolitiontraditional demolition techniques will have to be put aside. It will be necessary to disassemble and deconstruct the building in order to obtain homogeneous fractions of material.
For many businesses, make use of staff and machines that can perform oneselective demolitionit is a disheartening fact but you have to think long term: once this practice is started, the savings obtained will be high. Just think of the immediate reduction ofconstruction waste disposal costs.
Construction site waste, disposal
Dispose of construction wastehas a high cost. The cost perdispose of construction wastevaries from location to location. The distance from thebuilding siteto the storage air.
The rising price ofnatural materialsmakes recycling more advantageous, even when it comes to stone materials and metals (although they represent a minority of construction site waste). The recovered material derived from aconstruction site, once separated from other waste, it can become economically advantageous both for those who buy it and for the company that disposes of it.
Reuse of construction waste
Come onconstruction site wasteaggregates of an inert nature can be obtained such as sand and crushed stone usually destined for civil engineering works. With sand and crushed stone derived fromrecycling of construction site wasteit is possible to create road, railway, airport, industrial, civil, filling and bridging substrates. Again, foundation layers and concrete packaging.
The European legislation classifiesrecycled aggregateslike natural and artificial ones, for this reason, recycled waste is reusable for the purposes of the law and comparable to virgin materials.
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