Building A Jamaican Home Series: Laying Blocks With Mortar
#jamaican #building #mortar
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How do I mix mortar?
Mortar is a wet paste made of sand and cement
To mix a small amount of mortar by hand:
1 Put the dry sand and cement on a board and mix them together very well
with a trowel or shovel.
2 When mixed properly, all of the mix will be the same colour.
3 Make a heap of the mix and make a hole in the middle
4 Put water in the hole.
5 Lift the dry mix into the water - a little bit at a time until all the water is used up.
6 Mix it all together. Keep mixing for at least five minutes.
7 The mortar needs to be a paste like mashed plantain or potatoes.
If the mortar is too dry it won’t spread or stick to the blocks properly. If it is too wet, the water will separate from the sand and the mortar will run off the blocks. Add more water or sand/cement until your mix is right.
Only mix enough mortar for the number of blocks you can lay in about 30 minutes. In hot weather, the mortar will start to “go off” and be unworkable in less than 40 minutes. You can work with the mortar straight from the mixing board, but many tradespeople put the mortar into a bucket. It is easier to carry in a bucket and the mortar lasts a little bit longer before it goes off.
A good trowel is the most important tool when you are working with mortar and blocks
The mortar joint running along the top and bottom of the blocks is called the bed joint. The up-and -down, vertical joints are sometimes called “perpends” by tradesmen.
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