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The right mix for concrete

There are various ways to mix concrete and each is used for a specific job. Here is an easy guide to the various mixes and their uses:

 

LOW-STRENGTH CONCRETE
Used for standard foundations that do not require reinforcement, free-standing walls, building a braai or fire pit.

MEDIUM-STRENGTH CONCRETE
Used for reinforced foundations, concrete slabs, interior floors, patios, paths and driveways.

 

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HIGH-STRENGTH CONCRETE
Used for structural beams and slabs, precast items and heavy-duty floors.

CONCRETE MIXING AND USING GUIDELINES
Use only sufficient water for a workable mix, as too much water will result in reduced strength. Mixes should be used within a maximum of 2 hours after being mixed and you should never add additional water. After completion a project, it is essential to protect it from the sun and wind by covering with a plastic sheet, damp sand or hessian and to spray a daily, light misting of water over the surface for a minimum of 7 days, especially during hot weather.

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