Porous ceramics based on hydrolyzed lignin
Abstract
Porous ceramics based on hydrolyzed lignin
Incoming article date: 26.05.2021Hydrolysis lignin is a waste product of hydrolysis production (wood that has undergone thermochemical treatment). Lignin is of particular interest in the production of building materials, since it is unique in its chemical composition and physical properties. At the same time, the use of lignin at the present time will reduce the technogenic load on the environment, since the dumps of this waste occupy large areas, harming the ecology of cities. The purpose of this work is to study the possibility of obtaining effective ceramic products based on production waste for external enclosing structures. The article presents the results of determining the optimal percentage of the content of the burnout additive in the production of porous ceramics. The work shows the dependence of the change in physical and mechanical properties on the content and composition of the additive. It is shown that the best indicators are characterized by compositions with a 1: 1 content of lignin and sawdust in addition. The authors investigated shrinkage deformations during ceramics firing and drying. It is shown that when using the hydrolysis lignin of the Ust-Abakan plant, there is no loosening of the samples during sintering.
Keywords: waste, recycling, hydrolysis lignin, ceramic products, sawdust, porosity, shrinkage, density, water absorption