Quality Improvement of semi-dry pressing ceramic bricks from low-quality raw materials by the directional additives

Abstract

The advantages and disadvantages of ceramic bricks production by the method of semi-dry pressing, using traditional technology, are considered. Urgent problem of improving the available clay rocks’ properties, depleted in clay fractions and containing large amounts of dust particles is appeared in many regions due to the shortage of high-quality clay raw materials. The used materials were clay rocks of the Novosibirsk region. Research methods were introduction of directional additives to the composition of raw mixes that affected the compressive strength, water absorption, brightness and color of the burnt shard. The research results showed the need for an individual approach to the raw materials of each field. Types of additives, contributed to reducing water absorption, eliminating crack formation, increasing strength, expanding the color range of products, were identified.