09
Cement Mixer
by Admin ·
A Cement Mixer is used to mix mortar suitable for bricklaying or stonework. Cement is the basic ingredient in concrete and mortar mixes, modern cement was developed by a French man (Louis Vicat) in the early 19th century. The Romans had used a basic form of cement thousands of years before. Cement is now the second most consumed product in the world after water! Mortar or concrete can be mixed by hand using a suitable spade, but it is hard work and a cement mixer makes it far easier.
 |
 Concrete Cement Masonry Mixer Laying Training Course XP £5.42
|
 NEW RUSTY CEMENT MIXER Thomas wooden railway £9.10
|
 belle cement mixer £82.00 |
 cement mixer £145.00 |
 Lesney No 3a Cement Mixer vgc £3.20 |
 Master Mix cement mixer £80.50 |
| Powered by phpBay Pro |
Mixing mortar
There are various methods to mixing the mortar for bricklaying, here are a couple of examples:
1. Note that the ratio of this mortar mix is 6 parts sand, 2 parts lime, 1 part cement. (The use of lime gives better bonding quality to the mortar than plasticizers)
2. Pour 2/3 bucket of water into the mixer.
3. Fill bucket to top with sand and pour 6 full buckets of the sand into mixer.
4. Add another half bucket of water to ensure the mix is still wet.
5. Fill 2 buckets of lime and pour into mixer.
6. Leave to mix for about 3 minutes.
7. Fill one bucket of cement and pour into mixer.
8. Repeat the whole procedure to make a bigger mix depending on the size of the mixer, but keep to the same ratios and add water at regular intervals - not all at the end.
9. Leave the mixer running at a slow pace for 5 minutes to get a pliable smooth mortar.
Most commonly used is: 4 parts sand to 1 part cement, for bricklaying and pointing, whilst it is also a good idea to use a plasticiser as well
Or you could use: 1 part cement, 3 parts sand, add water for consistancy
Your mortar mix should never be stronger than the materials (bricks or blocks) you are building with. If your mortar is stronger than your blocks and you get a crack in the wall then your mortar will crack, as will your blocks as well, resulting in your wall being weakened. Whereas if your blocks are stronger than your mortar and you get a crack in your wall, then the mortar will crack, but the blocks will be bonded, so your wall will still be strengthened.
Cement mixers on large sites are a rare sight, cement and sand arrives dry on site by a tanker and is pumped into a silo awaiting to be used at any time by just adding water. Mortar prepared in this way gives uniform strength and colour and cuts out waste and can be prepared on demand.
