Those who are rarely confronted with the situation of concreting a foundation can make some crucial mistakes, despite the relatively straightforward nature of the work. Therefore, we explain below how to do it step by step.
First of all, the preliminary work is important, but it has already been described in other contributions and therefore only named again here. These include a foundation plan, a formwork that can withstand the high pressure loads during concreting and a cleanliness layer of gravel.
Concreting step by step to the foundation
- Concrete gravel
- Steel mesh mats
- Reinforcing steel
- Concrete mixer
- Hand tampers
- Concrete scrapers
Step 1: Mix concrete yourself
First, pour about one bucket of water into the concrete mixer. Then follows the concrete gravel, which still has to slide semi-liquid in the water. Suppose you have filled 6 shovels of gravel, then follow 2 shovels of cement. This results in a mixing ratio of 3: 1, which you must maintain thoroughly. In this way, make a mixture that fills the mixer drum up to one-half in order not to overload the mixer. Add only enough water to make the concrete earthy, ie slightly crumbly. Thoroughly mix.
For prefabricated concrete, this work is eliminated.
Step 2: Fill concrete into the formwork
Now fill the finished concrete into the formwork at a maximum height of 30 cm and compact it with the hand tamper. In narrow places use a square timber or similar.
Continue to fill in layers, compressing each time until the final height is reached. Avoid drying out the lower layer. Work with the required structural steel. Glatt Smooth the surface with a rake and smooth with the concrete puller.
Step 3: Ensuring quality