The correct setting of the foundations will ensure that the concrete base is of the required thickness and width to provide stability...
What is the correct batch ratio for mixing concrete?
The ratio of cement to river sand and stone determines the strength of the concrete. Here is a cheat sheet to ensure that you have the right strength of concrete for the job.
• Bucket / Tin
Low-strength concrete suitable for house foundations.
To make 1 cubic metre of concrete, you will need: 5 ½ bags cement + 0.75 cubic metres sand + 0.75 cubic metres stone.
Medium-strength concrete suitable for domestic floors, footpaths and driveways.
To make 1 cubic metre of concrete, you will need: 7 bags cement + 0.70 cubic metres sand + 0.70 cubic metres stone.
High-strength concrete suitable for precast concrete, heavy-duty floors.
To make 1 cubic metre of concrete, you will need: 10 bags cement + 0.65 cubic metres sand + 0.65 cubic metres stone.
Use containers such as buckets, drums or tins. Use the same size container for measuring all the materials in a batch.