Lateral forms are often made in pieces measuring 38 mm x 89 mm. These are placed according to the shape chosen and solidly nailed to stakes driven well into the earth. These stakes should not be spaced more than 1.2 m apart and they should be found behind each joint to ensure the formwork is properly aligned.

To make horizontal curves, see figure 10. Thick pieces of wood can be curved by sawing them to half or two thirds of their thickness. The stakes should be closer in curves to maintain the shape and level of the forms.

In vertical curves, where a driveway changes slope, short pieces measuring 38 mm x 89 mm should be used to make the form. Use a cord attached to temporary stakes to draw the shape of the curve, then install the form along this line, trying to obtain the most gradual variation of slope possible.

Use construction joints in places where the concrete pour is interrupted. The construction joint shown in figure 3 is equipped with a release agent, it will act as a contraction joint and should be located in the same place as a contraction joint.

After installing the forms, check to see if they can receive the desired thickness of concrete. Use a template, that you slide along the top of the form to level the subgrade material and ensure the concrete is of uniform thickness.




Advanced studies, in the laboratory and on job sites, have shown that entrained air and a low water/cement ratio are necessary for concrete used for exterior constructions, in order for them to withstand the scaling resulting from freeze/thaw cycles, especially in areas where de-icing salts are used.

It is therefore important to specify the right quantity of entrained air, cement, and water for concrete that is to be used outside.


Do not order more concrete than you can pour and finish in three hours. You will need at least one other person to help you. For large slabs of concrete, it would be best to have two other people helping. If you have no experience in placing concrete, do not order more than 2.5m3 of concrete at a time.

The quantity to order is calculated in m3 adding a 20% margin for unevenness of the subgrade, loss, etc. However, by using the services of Béton Mobile Sirosol, there is no need to justify a 20% margin because our ready-to-use concrete is mixed on site at your request when and where the concrete is delivered. It is best to place your order at least one day in advance.

Table A shows the requirements for mixing concrete. Béton Mobile Sirosol knows the quantities of cement and rocks needed to produce a concrete with a slump that will produce the best workability. In addition, all the components of the mixture, as well as its fabrication and transportation, are governed by national standards that your ready-to-use concrete supplier has agreed to respect.

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