Concrete Mix 20kg Bag

Cement Australia Concrete Mix is a quality ready-blended mix of cement, sand and aggregate, made for small projects around the home and garden. There’s no sourcing and measuring separate materials: add water, mix and pour. It suits garden edges, mower strips, paths, garden slabs, foundations, footings, and posts and uprights for pergolas.

Mixing is simple. Add 1.75 litres of clean water per bag to the mixer or wheelbarrow, then add the mix and blend thoroughly. Only add small extra amounts of water (about 100ml at a time) if you really need to, because too much water ruins good concrete. A good mix should hold its shape when squeezed in a gloved hand, neither too stiff nor too sloppy.

Place the concrete in the formwork, filling all the corners, then compact and level it and finish the surface with a float or trowel. Keep the surface moist for 7 days for maximum strength, remove formwork after 24 hours, and stay off it for at least 3 days.

Key specifications:

Good to know:

• Hot weather. Set times are affected by extreme heat, so avoid mixing and placing above 35°C. That matters in a Mackay summer, so pour early in the day.
• Measure properly. Don’t measure with a shovel, because cement lies flat and gives the wrong proportions. Use a bucket for dry ingredients and a measuring jug for water.
• Aluminium posts. Cement Australia recommends checking with the aluminium post manufacturer or supplier that the concrete is suitable before use.
• Safety. Cement is alkaline. Wear gloves and eye protection, and refer to the Safety Data Sheet.