A new method for building roads from soda production waste — sludge — has been invented at Perm National Research Polytechnic University (PNRPU). This was reported by the university's press service.
Scientists have studied the characteristics of calcium carbonate sludge. The use of this material will increase the bearing capacity of soil layers of roads during the construction of the roadbed.
We conducted preliminary experiments and found that this method can strengthen the soil by 6-18%, depending on its acidity and particle size distribution. This increases the soil's resistance to external loads created by vehicles and the weight of the overlying structural layers of the pavement.
To eliminate soil and water contamination by chloride ions contained in the sludge, scientists proposed using fly ash. It is formed on the filters of thermal power plants during the combustion of solid fuel. Fly ash absorbs free chloride ions.
Replacing natural materials in road structures with soda production waste is in line with modern principles of resource conservation and sustainable development. Abandoning the strengthening of soils with cements, which are widely used today, and switching to carbonate sludge will also reduce carbon emissions generated during cement production.
The developers plan to conduct an experiment. After its success, the new composition will be used in road construction.
Earlier www1.ru reported that in Mordovia created a super-strong polymer from multilayer packaging waste.
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