MC-PowerFlow X
The concrete admixture for reliable workability with sustainable cements, recycled materials and challenging aggregates.
Urban Mining – alternative fillers
One of the most sustainable solutions is the circular economy, in which the term “urban mining” is frequently used. It refers to identifying and assessing man-made “resource deposits”. The aim is to determine which reusable materials they contain and whether recovering or reusing these materials is worthwhile under the given technical and economic conditions.
Urban mining in concrete production
Recycling construction materials
Old construction products that are no longer in use can serve as valuable sources of raw materials and be reused in the construction industry. One option is to grind these materials into a fine powder and then use them as fillers in concrete. Finely distributed mineral powders with a main particle size below 0.063 mm primarily have a physical effect in concrete through the filler effect: they fill the voids between coarser aggregates, increase the packing density of the concrete matrix and thereby improve the compressive strength of the concrete.
Ground clay bricks
Clay bricks can be reused as part of the circular economy: they can be crushed and then ground into a fine, reddish filler. One disadvantage of these fillers is that conventional admixtures initially bind to the clay particles, meaning that they can no longer fully develop their effect on concrete consistency and slump retention.
How does MC-PowerFlow X help with alternative fillers?
Full effect even with ground clay bricks
MC-PowerFlow X compensates for this reduced effectiveness due to its completely new chemical composition. It binds the clay particles in the concrete from the very beginning, allowing subsequent admixtures to regain their full performance. At the same time, MC-PowerFlow X improves the workability of the concrete, ensures consistent consistency and thus enables the production of high-performance concrete – while reducing its CO₂ footprint.
Application example
The graphic shows the influence of alternative fillers. In this application example, MC-PowerFlow evo 514 was used. When alternative fillers were used, a slight decrease in slump retention was observed. This issue can be balanced out with MC-PowerFlow X. Both improved initial slump and slump retention can be achieved.
The effect of alternative fillers on consistency
Want to learn more about the effect of MC-PowerFlow X when using alternative fillers?
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