Placing your concrete is a challenging job. Since every project is different the area of placement, shape, size, colour, finish and depth all have to be considered before you begin pouring your cement. Keeping this in mind is vital to ensuring the long-term durability of your project. These tips from PPC will give you a better understanding of all the steps involved when placing your concrete.
You must place your concrete within an hour of mixing.
Place the concrete as close to its final position as possible.
If the concrete is being placed on the ground, dampen the area with a spray of water before placing concrete.
Once placed, make sure it is spread evenly. For bigger projects use a rake or spade.
The concrete should be well compacted or ‘tamped down’ with a rod or spade, making sure that the concrete fills the form or hole completely.
To create flat surfaces, use a wooden straight edge tool. First use a ‘chopping’ motion, then a sawing motion to flatten the surface and then strike off the excess concrete.
Concrete slabs should be divided into panels to limit cracking. Joints should be no more than 2.5 metres apart for 80mm-thick slabs and 3 metres apart for 100mm-thick slabs.
Once the concrete has stiffened, it must be kept damp by covering it with plastic sheeting, damp hessian, damp sand, or by spraying it with water regularly. For optimum strength, this curing process should be continued for 7 days.
Keep any weight off the concrete for at least 7 days.
Information sourced from PPC.
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