Used concrete recycled as aggregate for new concrete

[EN] This Bachelor thesis has investigated recycled concrete aggregates in bound form. It has given a general overview of what RCA is and the importance of utilizing it. A presentation of the latest research conducted on the material with a special focus on the mechanical properties is given. The new concrete mixture proportioning method called the Equivalent Mortar Volume method is being presented and an Excel worksheet for using the new method is created. This worksheet is more like an example than a program for concrete proportioning. A short investigation of how a reduction of compressive strength reduces the resistance of a beam is also conducted. The reduction of compressive strength is calculated after a proposed equation which takes the amount of RCA into account. At last a study of non structural possibilities for RCA has been carried out.