Nanomodification of low-quality clay raw materials: a method for increasing the strength of a ceramic shard

Due to the fact that ceramic bricks remain the main type of wall products in a number of regions, including Siberia, the question regarding the quality of clay raw materials arises. Low quality of clayey rocks facilitates the need to switch to the production of semi-dry pressing products in combination with the use of additives of directional action and activation of raw materials. A new field that makes it possible to increase the strength of a ceramic shard is the nanomodification of raw materials. The analysis of the use of nanotechnologies in the production of wall ceramics is given. It has been experimentally established that the addition of 0.005 wt. % nanosilica at optimal pressing pressure and firing temperature allows to increase the strength of the ceramic shard by 32.8% without changing the average density and water absorption.