For optimal results when working with masonry blocks, it is crucial to follow best practices. One important guideline is to ensure that the blocks are dry when laid in the wall to minimize subsequent shrinkage. Additionally, keeping mortar off the face of the blocks and cleaning off droppings as work progresses, before the mortar sets, is essential. Whenever possible, avoid cleaning down with acid.
When it comes to color consistency, care should be taken to order enough product to complete the project at the same time to avoid batch variations. Concrete masonry blocks behave differently from clay bricks in terms of 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 detailed 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. For core filling, the following estimates apply: 0.65m3 of concrete per 100 blocks for 150mm 'H' blocks, 0.8m3 of concrete per 100 blocks for 200mm blocks, 0.84m3 of concrete per 100 blocks for 200mm 'H' blocks, 1.1m3 of concrete per 100 blocks for 300mm blocks, and 1.32m3 of concrete per 100 blocks for 300mm 'H' blocks.
Features
- Ensure blocks are dry to minimize shrinkage.
- Order enough product to avoid batch variations.
- Follow Australian Standard 3700-2011 for control joints and reinforcement.
