A kind of anti-crack pressure brick and preparation method thereof

Abstract

The invention discloses an anti-cracking and pressure-resistant brick and a preparation method thereof. The anti-crack and pressure-resistant brick comprises the following raw materials in percentageby weight: 20%-40% of plastic clay material, 40%-60% of 15-25 mesh split brick clinker particles, 10%-25% of feldspar solvent, and 2%-5% of anti-cracking agent, wherein the anti-cracking agent consists of the following components in percentage by weight: 20%-40% of pure acrylic emulsion, 5%-20% of alkyl vinyl ketone modified cellulose, 1%-5% of phosphate, 1%-5% of polyvinyl alcohol, 10%-15% of bentonite, 2%-5% of polyacrylic emulsion, and 15%-35% of water; and the anti-crack and pressure-resistant brick has a thickness of >=30mm. According to the anti-cracking and pressure-resistant brick andthe preparation method thereof, dry crack resistance of unburned bricks is improved, and generation of sintering cracks is avoided; under the premise of not damaging strength and firing strength of the unburned bricks, shrinkage deformation performance of the unburned bricks can be effectively reduced; and the using amount of the plastic clay material during extrusion molding can be greatly reduced, and the using amount of large-particle ceramic waste can be greatly improved to avoid occurrence of fine cracks and stealth cracks in a burned finished product.

Description

technical field

[0001] The invention relates to the field of extruded floor tiles, in particular to a crack-proof pressure-resistant brick and a preparation method thereof. Background technique

[0002] Existing pressure-resistant bricks, as a kind of extruded floor tiles, are widely used in public places with dense crowds such as squares, stations, sidewalks, etc. because of their high compressive strength. Generally, pressure-resistant bricks have a thickness of more than 30mm in order to achieve higher strength. Due to the large thickness and poor plasticity, it is difficult to form, and the drying shrinkage and sintering shrinkage are high, which makes the bricks prone to dry cracks and sintered finished products. It is also prone to fine lines and invisible cracks, resulting in a high loss rate of WIP. Contents of the invention

[0003] The object of the present invention is to propose a crack-proof pressure-resistant brick with low drying shrinkage and sintering shr...

Images