Influence of liquid waste from processing wood- shavings boards on the water requirement of cement taste paste

This article is devoted to considering the possibility of using waste from processing particle boards, and the use of these wastes in the construction industry, in particular in the preparation of concrete mixtures. The liquid remaining after wet grinding, screw mills, and chipboards is considered as the waste used. In the process of soaking wood boards, water is washed out/saturated with their constituent substances, that is, formaldehyde, which is a component of the binder resin, and lignin, which is the main component of wood. Both substances are used as the basis for the production of plasticizing additives, so their presence in the aqueous extract will contribute to a change in the rheological properties of the cement. To confirm this assumption, studies of cement paste were carried out using a Vicat device with a pestle on various types of cement. After that, graphs of changes in mobility were plotted and the plasticizing effect was assessed.