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How to mix the right amount of cement for your project

The experts at PPC guide us on the correct way to measure and mix cement

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When working with cement, it is vital you take into account the different methods of mixing concrete and how to calculate concrete quantities. This will ensure your project lasts a lifetime. In order for your mix to produce the best results, you need to use a power-packed cement, like PPC Cement with extra strength. Because it has extra strength it makes more concrete than other regular general-purpose cements. So you will achieve more for less.

How to choose the right PPC cement for the purpose:

PPC SUREBUILD Cement 42,5 N – This general-purpose cement is for building and civil engineering work. PPCSUREBUILD Cement 42,5 N with extra strength, gives you more concrete than regular 32,5 general-purpose cements.

PPC OPC Cement 52,5 N – This cement is best for use in structural concrete and ready-mix concrete and where high early strength is needed. PPC OPC Cement 52,5 N with extra strength gives more yield than regular cements.

Batching and mixing materials:

When mixing materials, it is important to know the correct ratios that allow for accurate concrete mix estimating. Below is a breakdown of how to batch and mix different materials:

  • 1 bag of cement has a volume of 33 litres.

  • 1 builder’s wheelbarrow has a volume of 65 litres, which is equivalent to two bags of cement.

  • Do not split bags when batching except for small or unimportant work.

  • Use a concrete mixer or hand mix on a dry, clean, non-absorbent surface.

  • When mixing concrete by hand, first mix the cement, sand and water thoroughly and mix in the stone last – this saves a lot of effort.

  • Mix until colour and workability are uniform.

Getting the quantity right:

Estimating concrete quantities can prove challenging and it’s vital to produce the correct mix for your project. Here is a simple table of best practice amounts and guidelines on how to better calculate concrete quantities:

1

2

3

For all concrete work add sufficient water to make a plastic, workable mix. The addition of too much mixing water will cause segregation and weaken the mix.

How to store your cement correctly:

To maintain the quality of your unmixed cement, there are specific guidelines on where and how to store your cement bag:

  • Cement should be stored in a weatherproof shed or container.

  • It should be closely packed, away from doors and windows.
  • It should be packed off the floor, and on plastic.
  • It should be covered with a plastic sheet or tarpaulin.
  • It should be stored so as to ensure "first in - first out" use.

Text and image source: PPC

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