Brick and Tile Industry International

Avoiding product damage

During firing of brick products, factors such as expansion and shrinkage processes, endothermic and exothermic reactions as well as mineral phase transformations play a significant role. In the course of the firing process, stress tolerance limits are often exceeded, so that the danger of quality-impairing damage such as cracks, spalling, deformation and microstructural damage increases. Besides the visible damage, especially cracks inside bricks, for example web cracks in lattice bricks or microstructural damage in solid bricks, are difficult to detect. They are, however, a severe quality...

Issue 2012-7-8

Optimization of the strength properties of clay masonry bricks

1 Introduction and objective The shear loading capacity of stiffening masonry walls is playing an increasingly important role in the realization of construction projects. Current developments,...

Issue 2014-04

Causes and avoidance of firing-related damage Part 2: Strength-reducing reactions in the heating-up zone from 500 to 800°?C

4 Expansion and shrinkage processes In a tunnel kiln firing process for heavy clay products, there should be no mutual contact between the wares to be fired, and all exposed surfaces within and around...

Issue 2010-03

Causes and avoidance of damage on account of diffusion-dependent reactions in the preheating zone of tunnel kilns with specific consideration of the pore structure of green bricks

1 Background After they have been dried, green clay bricks enter the preheating zone of the tunnel kiln with a varying residual water content. In this preheating zone, the following processes take...

Issue 2013-09

Turkeys clay brick and tile industry history, present and future

1 History Clay bricks and roofing tiles are some of the most common and preferred materials for the construction of housing. They do not contain any substances harmful to health, boast good...

Issue 2010-5-6

Reduction of the thermal conductivity of brick bodies through fast firing

1 Introduction The increased demands in terms of the quality of vertically perforated bricks call for the brick industry to manufacture products with very good thermal insulation properties and...

ZI 11/2013