Scientists from Perm National Research Polytechnic University (PNRPU) have developed a method to turn wood waste into ceramic bricks. socialbites.ca was informed about this by the press service of the scientific institution.
Experts of Perm Polytechnic studied how technological combustion additives obtained from hydrolytic lignin affect the properties of clay raw materials for the production of building blocks.
Hydrolytic lignin is formed during the processing of coniferous and deciduous wood, as well as during the treatment of wastewater from paper mills.
Although such wastes are considered non-hazardous, their annual production in large quantities creates a serious burden on the ecological system. One of the recycling options may be the production of building materials in the form of ceramic bricks and blocks.
Polytechnicians studied the chemical composition of lignin, as well as its main component, the moderately plastic, low-melting-point clay raw material.
The samples were determined for their plasticity and molding properties, as well as the behavior of the material (water absorption, density and shrinkage) depending on different firing temperatures.
“It turns out that the optimal content of hydrolytic lignin is 11-12% by weight of clay raw material and a firing temperature ranging from 980 to 1040°C. Compliance with such parameters will allow us to obtain ceramic products with the necessary properties and material quality,” said PNRPU Construction Vitaly Shamanov, associate professor of the Department of Engineering and Materials Science.
The study confirmed that waste from the wood processing industry can be considered as a technological raw material for complex modification of building ceramic materials.
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Source: Gazeta

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