Rullarmering - Ett rationellt sätt att armera
This is a degree project performed at Halmstad University in Sweden on the subject carpet ofreinforcement. This project is developed in association with Celsa Steel Service in Halmstad.The purpose of this report is to investigate how much time that can be saved if carpet ofreinforcement is used instead of the traditional way to work with reinforcement and seewhat kind of parameters that is important between the choices. We are also going to seehow this product affects the situation for reinforcement workers from an ergonomic point ofview.Carpet of reinforcement is made by straight reinforcement?s bars that are welded togetherwith steel bands. These rolls are made at a factory with a machine that welds together thebars in determined centre distance, with desired dimensions after the constructionengineers? blueprints. The big advantage is that the work at the construction site becomesmuch easier. Also the number of reinforcement workers and the total time of the projectcan be reduced. All this together saves money.The soft parameters like work environment are also affected in a good way. The rolls areheavy and have to be lifted with a construction crane which saves the reinforcement ironworkers body. The traditional work with reinforcement involves a lot of heavy lifting andtrying work positions for the workers. Therefore is it fairly usual with wear injuries in thetrade. We think that carpets of reinforcement may reduce the amount of wear injuries. Mostof the workers that we interviewed seem to like the product.There are two different products that Celsa Steel Service provides the trade with. Bamtec isthe oldest of these products and also the most common and appreciated. In connection withbuilding of bridges it is forbidden to weld together the reinforcement because of the risk offatique fractares in welded zones. Because of this, Bamtec can not be used in bridges. Foruse in bridges a new product called SpinMaster, without welding, has been developed.Carpet of reinforcement works best at large simple foundation slabs but can also be used inwalls.