Concrete, Mortar & Plaster mixes for builders

2. plaster – external
(Complying with SANS 2001 - EMI 2007)

2.1 large batches: using common cement complying with SANS 50197

To plaster 100 square metres (15 millimetres thick) you will need: 14 bags cement + 2,25 cubic metres sand.

Using masonry cement complying with SANS 50413 class MC 22,5X or MC 12,5. Do not use class MC 12,5X.

To plaster 100 square metres (15 millimeters thick) you will need: 17 bags cement + 2,25 cubic metres sand.
2.2 small batches: use containers such as buckets, drums or tins.
Use the same size of container for measuring all the materials in a batch.

(Complying with SANS 2001 - EMI 2007)

To plaster 100 square metres (15 millimeters thick) you will need: 12 bags cement + 2,3 cubic metres sand.

Using masonry cement complying with SANS 50413 class MC 22,5X or MC 12,5.

To plaster 100 square metres (15 millimeters thick) you will need: 14 bags cement + 2,25 cubic metres sand.

Using masonry cement complying with SANS 50413 class MC 12,5X.

To plaster 100 square metres (15 millimeters thick) you will need: 20 bags cement + 2 cubic metres sand.

Use the same size of container for measuring all the materials in a batch.

4. class I mortar
(Complying with SANS 2001 - CMI: 2007)
4.1 large batches:
Using common cement complying with SANS 50197

To lay 1 000 bricks you will need: 4 bags cement + 0,55 cubic metres sand.

Using masonry cement complying with SANS 50413 class MC 22,5X or MC 12,5. Do not use class MC 12,5X.

To lay 1 000 bricks you will need: 7 bags cement + 0,5 cubic metres sand.

4.2 small batches:
Use containers such as buckets, drums or tins. Use the same size of container for measuring all the materials in a batch.

5. class II mortar
(Complying with SANS 2001 - CMI: 2007)
5.1 large batches:
Using common cement complying with SANS 50197

To lay 1 000 bricks you will need: 3 bags cement + 0,6 cubic metres sand.

Using masonry cement complying with SANS 50413 class MC 22,5X or MC 12,5. Do not use class MC 12,5X.

To lay 1 000 bricks you will need: 4 bags cement + 0,55 cubic metres sand.

5.2 small batches:
Use containers such as buckets, drums or tins. Use the same size of container for measuring all the materials in a batch.

1. The amount of water added to a mix must be enough to make the mix workable and plastic.
2. Common cement complying with SANS 50197 may be used for concrete, plaster or mortar.
3. Stone for concrete should be 19 mm or 26 mm size.
4. If you use a wheelbarrow for measuring, it should be a builder’s wheelbarrow which has a capacity of 65 litres.
5. Cement should preferably be batched by the bag. (Batching by the bag is more accurate and involves less wastage than
   batching smaller volumes in tins or drums.) A bag of cement has a mass of 50 kg and a volume of approximately 33 litres
   when packed at the factory. Cement, however, fluffs up (or bulks) when poured into a container, with the result that 50 kg
   of cement cannot be readily be contained in a 33-litre drum. The small-batch proportions given in this leaflet have been
   adjusted for the bulking of cement during volume batching in small containers.