For optimal results when working with masonry blocks, it is crucial to follow specific guidelines. Firstly, masonry blocks should be dry when laid in the wall to minimize subsequent shrinkage. Keeping mortar off the face of the blocks is essential; clean off any droppings as work progresses and before the mortar sets. Whenever possible, avoid cleaning down with acid.
When it comes to color, ensure you order enough product to complete the project at the same time to avoid batch variations. Concrete masonry blocks behave differently from clay bricks regarding moisture movement and temperature changes. Assuming sound foundations are provided, cracks in walls can be avoided by the correct use of control joints, bond beams, and/or joint reinforcement. The rules for using these elements are contained in Australian Standard 3700-2011.
For useful estimating data, blocks with a 390x190mm face equate to 12.5 units per square meter and 2.5 units per linear meter. To fill 200mm bond beams, allow 0.013m3 of concrete per linear meter of beam. To core fill 150mm 'H' blocks, allow 0.65m3 of concrete per 100 blocks. To core fill 200mm blocks, allow 0.8m3 of concrete per 100 blocks. To core fill 200mm 'H' blocks, allow 0.84m3 of concrete per 100 blocks. To core fill 300mm blocks, allow 1.1m3 of concrete per 100 blocks.
Features
- Ensure blocks are dry before laying to minimize shrinkage.
- Clean mortar droppings as work progresses to avoid stains.
- Order sufficient product to avoid batch variations.
