Defects of brick masonry and how to solve them
Concrete blocks
Sulphate
Sulphate salts in brickwork react with alumina in cement and hydraulic lime, causing volume expansion in mortar. This leads to chipping and spalling of the bricks and forms cracks in joints and rendering. The problem typically appears in boundary walls, parapets and moisture-prone areas like retaining walls. The solution involves selecting appropriate construction methods and materials that prevent moisture infiltration.
Crystallisation of salts in bricks
When bricks with high soluble salt content contact water, the salts dissolve and crystallise on the surface, a phenomenon called efflorescence. This discolours and degrades the masonry's appearance. The remedy involves repeated brushing and washing of affected surfaces.
Corrosion of iron or steel
Dampness causes metal reinforcement to corrode and expand, potentially cracking the surrounding brickwork. Protection is achieved by encasing steel in dense cement mortar with a protective cover of 15 to 25 mm.
Shrinkage on drying
Water absorption causes brickwork to swell, subsequent evaporation creates shrinkage cracks in mortar joints. Lean mortar distributes cracks across many joints, while rich mortar produces fewer but wider cracks. These structural impacts remain minimal and are preventable through quality materials and moisture management.
Tell us what you want to make.
Send the product, the volume and the site. Our engineers come back with a machine, a layout and a number.
