When both fine and coarse aggregates are poorly graded the following general rules regarding suitable proportioning of these will be found helpful.
Correct mix for concrete floor.
Since garage floors will be supporting heavy equipment such as cars and trucks you need to make sure that the concrete mix you use will effectively provide the needed strength to make your concrete mix get some cement sand gravel and water.
To test the consistency use the blade of your shovel like a knife and try to cut a shallow channel through the surface of the premix concrete.
Whether you hand mix concrete in a plastic tub homemade mixing tub or wheelbarrow the technique is the same to find the right concrete mix ratio.
When durability is key high strength concrete makes a great choice.
Holes 1 inch or deeper require a concrete mix with coarse crushed stone aggregate which bonds well with existing concrete.
This sets in just 20 to 40 minutes.
Simply pouring wet concrete into a hole in your driveway sidewalk or basement floor won t make for a lasting repair.
The best combination would be 1 part cement 2 parts sand small aggregates 3 parts gravel large aggregate and 1 part water.
For maximum size of coarse aggregates as 40mm and over sand should be half as much as coarse aggregates.
When you mix concrete properly it ends up with a consistency that has been compared to cookie dough.
Accurate concrete mixing ratios can be achieved by measuring the dry materials using buckets or some other kind of measuring device.
For larger jobs you could rent a mixer 35 per day but it may be more economical to simply order ready mix concrete.
By measuring the cement stone and sand you will have a consistent concrete mix throughout your entire project.
You have to prep the edges correctly and use the right materials.
Large batches of concrete mixes.
Choose whether you need ready mix concrete delivered or plan to mix your own from a dry mix.
To make 1 cubic metre of 15 mpa concrete you will need to mix 5 1 2 bags of cement with 0 75 cubic metres of sand and 0 75 cubic metres of stone.
When you need to support a fence or mailbox post or create a small concrete slab fast setting concrete makes a great choice.
A concrete slab s strength depends on how the concrete its mixed.
For maximum size of coarse aggregates as 20mm and over sand should be two thirds as much as coarse aggregates.
This is ideal for foundations footers and heavy equipment.
15 mpa this is a low strength concrete mix and is suitable for house foundations that are not reinforced and for boundary walls and freestanding retaining walls.
The first decision is deciding what type of concrete works best for your project.
Add more water and mix the concrete further.
Pouring a concrete floor slab successfully requires that you use the correct concrete mix for the slab.
If it is too dry the channel walls will be crumbly.
Shallower holes need a sand mix.
However it s easier to move and dump concrete that s mixed in a wheelbarrow.