Description
Australian Builders Concrete Mix is a dry mix of cement, 7-10mm aggregate and sand for non-structural concrete work where no special requirement is specified. Just add water: the cement, sand and aggregate are already proportioned in the bag.
It suits paths, mower strips, garden borders, stepping stones, light foundations and fixing fence, pergola and decking posts. The product data sheet gives a typical compressive strength of more than 25 MPa at 28 days, tested to AS 1012.9.
As a guide, use about 2.4 litres of clean water per 20kg bag, and about 100 x 20kg bags make 1m³ of concrete. Store bags dry and use them within the shelf life printed on the bag (from date of manufacture). Pickup from our Keilor East yard.
Technical Specifications
| Composition | Cement, 7-10mm aggregate and sand (approx. 1 : 2 : 2 by volume) |
|---|---|
| Compressive strength (typical) | >12 MPa at 7 days, >25 MPa at 28 days (tested to AS 1012.9) |
| Water | Approx. 2.4 L per 20kg bag |
| Coverage guide | Approx. 100 x 20kg bags per 1m³ |
| Shelf life | Use within the shelf life printed on the bag (from date of manufacture) |
| Pack size | 20kg bag |
Where to Use
- Pathways and mower strips
- Garden borders and stepping stones
- Fence, pergola, decking and clothesline posts
- Light foundations and small non-structural slabs
How to Apply
- Prepare the area: excavate and form up the area to the required depth.
- Empty the bag: into a wheelbarrow, mixer or onto a smooth, strong surface.
- Add water gradually: about 2.4 litres per 20kg bag, using the minimum needed for a workable mix.
- Place and finish: use the concrete immediately after mixing, and do the smooth finish after the initial set.
- Cure: keep the concrete moist under plastic sheeting or hessian; the first week matters most.
Important Notes
- Wet cement is alkaline and can burn skin and eyes. Wear gloves, eye protection and a P2 mask, avoid breathing dust when opening or mixing, and wash it off skin promptly. See the Safe Work Australia guidance on cement and silica dust.
- Cement, sand and aggregate contain crystalline silica. Keep the material damp where you can, avoid breathing the dust, and wear a P2 mask if it is dry and dusty.
- For non-structural work. Use a mix specified to the required strength for structural work.
- Use within the shelf life printed on the bag (from date of manufacture), and store in dry conditions.
- Mix only what can be placed before the concrete begins to set.
- Pickup only from our Keilor East yard.
