This report is conducted in collaboration with NCC Construction Sverige AB and treats sewers from the contractors’ standpoint. The report investigates in an all round way how the work with sewers operates in a contract company and which aspects that speak for the different pipe materials, plastics and concrete from an overall economic perspective. Nowadays both tubes and wells made from plastic as well as concrete are widely-used and advertised. The document represents which factors that affect the choice of pipe system, plastics or concrete. The plastic materials that the report treats are polyethylene (PE), polyvinyl chloride (PVC) and polypropylene (PP). The research for the work has been done in 4 parts….
Part one includes literature studies of materials from experts, sector organizations and corporations. And the second part consists of interviews and the 3rd portion site visits.Those persons who’ve been surveyed are active within the civil engineering construction department at NCC Construction Sverige AB in Jönköping and also have jobs as calculator, purchaser, place manager, overseer and construction worker. The site visits are performed at three places of work nearby Jönköping, the house exploitation area Samset, the industry establishment of food industry and the street and water/sewer pipe project at the industrial area of Torsvik..
The fourth part is a calculation that shows the overall economic for disposition of different dimensions of plastic – and concrete tubes. The result of the studies shows that work with sewers is a complex reality. The work is influenced by a large number of factors, for example; weather, the properties of the soil materials, the purchasing economic frames and the properties of tubes- and well material. A workplace that one day has normal productivity is the next day in risk of considerably lower productivity because of unfavorable weathers in co-operation with the geotechnical properties of the soil…
When it comes to material choice for tubes and wells the study shows that there is a number of situations where either plastics or concrete can be recommended. The conclusions of which material that is best suitable are based on the purchase cost, the work cost and the production technical advantages, i.e. an overall economic perspective….
Author: Olsson, Axel, Sjölander, Rickard
Source: Jönköping University
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