Waste reduction final report -4 - Test Input
Waste reduction final report -4 - Test Input
Waste reduction final report -4 - Test Input
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About 80% of outflowing materials are recycled. Remaining materials go to landfills or<br />
incineration plants.<br />
The mentioned, materials are used differently in building and civil engineering. Error!<br />
Reference source not found. contains three types of information about material stocks in<br />
building and civil engineering: First, it lists different materials such as concrete, bricking or<br />
asphalt. In addition, it shows how many Mm3 and MT of the relative material are stocked in<br />
building or in civil engineering. Lastly, percentages represent the percentage of the respective<br />
material in the whole stock of materials. The totals of stocked materials are 1470 Mm3 or<br />
2823 MT respectively [FOEN 2008c]. This number is in accordance with an another<br />
literature source with a total stock of 2460 MT [FSO 2005].<br />
Figure 4: Stocks in Swiss construction expressed in Mm3 and MT [FOEN 2008c].<br />
Concrete<br />
Bricking<br />
Combustible<br />
materials<br />
Wood<br />
Metals<br />
Mineral remaining<br />
fraction<br />
Mixed materials<br />
Asphalt<br />
Gravel/Sand<br />
About 56 % in volume of all materials are stocked in house buildings (mainly concrete and<br />
bricks), another 44 % in volume in civil engineering (mainly gravel/sand). For weight<br />
percentages, this ration is about 50:50. It is evident that percentages and amounts vary much<br />
when expressed in volume or in weight. For example, concrete volume makes up nearly 40%<br />
of the total volume stocked in buildings, whereas it approaches 55% when expressed in<br />
weight. Similarly, 56 % in volume of all materials are stocked in the whole Swiss building<br />
structure in contrast to 49 % in weight. It is important to check if percentages are expressed<br />
by volume or by weight.<br />
Concrete and gravel/sand make the biggest part of materials stocked in constructions.<br />
Altogether, concrete and brickwork/gravel and sand build up to 80 % in weight in houses and<br />
nearly 90 % in weight in construction engineering. This can be explained by their extensive<br />
use in supporting building elements (ceiling, wall and fundament) and in road construction. It<br />
is interesting to see further on in chapter 2 the relation of the quantity of material used to its<br />
recycling quantity.<br />
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