Pour the concrete base into the formwork box

The casting of a concrete base is a middle thing between a concrete foundation and a concrete block. Mostly concrete bases are needed to make smaller mounts for umbrellas, flower tubs, fountains or bird baths. Since often the weight of the concrete is sufficient for the stability, an introduction into the soil as a foundation is not necessary.

Difference between concrete base, foundation and stone

The boundary between the casting of a concrete foundation and a concrete base can be drawn into the ground based on the depth of penetration. While a concrete foundation is floor-mounted and has a foundation, a concrete base is usually only slightly sunk or is used completely above ground level.

For the casting of a concrete pedestal, in most cases a full casing is constructed with soil, so that a component or workpiece independent of the soil is created. The production is similar to the pouring of concrete blocks, whereby the pedestals are usually larger than concrete blocks and are adapted in shape to the intended use.

Shuttering form and construction type

When building the concrete formwork yourself, a kind of box is constructed, into which the concrete is poured. It can have a firmly anchored floor or be used as a downwardly open frame. In the case of a frame, the working surface on which a base is to be cast must be treated with a release agent or formwork oil, similar to the inside of the formwork, in order to enable subsequent removal of the concrete base.

Lumber, old screen printing plates or coated chipboard are suitable for the formwork. Attention should be paid to the low or absent absorbency of the formwork materials, as otherwise the setting process of the concrete may be disturbed or even rendered impossible. The formwork construction must be designed so that it can be opened and dismantled from the outside after the concrete has dried and set.

A dry concrete base can not "plunge" like a cake from the baking pan. For good removability, which is produced in the baking sheet by butter, the formwork must be pretreated with formwork oil or a release agent.

Ground anchor and concrete consistency

A special form of a concrete base make ground anchors. Here, usually either above-ground or with a small recess metal components are embedded in the concrete. Depending on the subsequent load, concrete foundations with foundations may also be necessary. A typical example of an aboveground ground anchor represents a parasol base with concreted screen holder ear.

When casting a concrete base, relatively firm concrete should be used with little water. Since the formwork, in particular old timber, draws water from the concrete during the setting process, this reduces the possible destabilization of the concrete base due to excessive water loss.

Tips & Tricks

If you are planning a different concrete structure on a concrete base, make sure that the concrete strength of the base concrete is above the concrete built up on it.

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