Diy Bathroom Concrete
DIY bathroom concrete is found on the floor of the bathroom, unless of course it has a suspended wooden floor, in which case there won't be any concrete at all. If you're going to tackle DIY bathroom concrete work, you'll either be involved with the floor slab, or you'll be installing a bath. Either way you're going to have to know how to mix DIY bathroom concrete.
The broad options for DIY bathroom concrete work are to:
• buy pre-mixed bags that contain cement, sand and the crushed stone you need to mix concrete already measured out, or to
• buy sacks of cement and then bags of crushed stone and suitable building sand.
If you are throwing a floor slab in the bathroom, you will probably opt for sacks and either bags or truck-delivered sand and stone. If you are throwing the slab for a whole house, you might prefer to buy ready-mixed concrete that is delivered in a special truck that mixes the concrete as the truck travels. Then all you do is have it delivered to where you want to use it, and then compact and level it. Pre-mixed bags are really only suitable for smaller jobs.
Cement is manufactured in different strengths. When you buy cement for bathroom concrete projects, choose what is often referred to as a 'common' cement. If you aren't sure, ask. Crushed stone also comes in different sizes, the smaller it is the easier it is to mix the concrete. But usually a 19 mm or 13.2 mm stone will work the best. You must also only use a sand that is suitable for concrete work. Building sand might look like beach or dune sand, but it doesn't have shell particles or salt in it. It is also more coarse than most beach or dune sands. Apart from which it is illegal to remove sand from beaches and dunes.
Before you start mixing concrete, you need to know what quantities of the raw materials you are going to use. Usually when we mix concrete for DIY jobs, we measure out the cement, sand and stone by volume. It isn't 100% accurate, but it works well enough. Given as a ratio, for example 1:4:4, what it means is that to one part of cement, you add four times as much sand and four times as much stone. If you're mixing by hand, once you've combined the cement and sand, you add just enough water to make the mix easy enough to work with, without it becoming too runny. Then you add the stone. If you're using a concrete mixer to mix your bathroom concrete, then put the stone in first, followed by the cement, sand and water.
Whether you're mixing by hand or in a mixer, the one vital element is that each of the raw materials must be measured out in the same container. So if you're using a wheelbarrow, use the same wheelbarrow. If you are using drums, use the same or same-sized drums.
As a guide, for low strength concrete, which would be fine for setting a bath in place, use a 1:4:4 mix. For medium-strength concrete, use a 1:3:3 mix, and for high strength concrete use a mix that is in the ratio 1:2:2. That's going to make you some good DIY bathroom concrete.