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Thread: White coloured mortar
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28th March 2008, 07:31 AM #1
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White coloured mortar
I've always loved the look of bright white mortar, especially when it's next to nice red bricks. When I've done bricklaying in the past, I have just used the normal ingredients and get that typical light grey colour.
I would like to start using white mortar; what do I use to achieve this? Is it a different type of cement, or is it a different type of sand? I know oxides would also change the colour, however I'd much prefer to achieve white mortar without using oxides.
Many thanks,
Zac
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28th March 2008, 07:52 AM #2
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It's a different cement.
Cheers,
Adam
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29th March 2008, 01:02 AM #3
white brick sand, white cement, and lime all make a white mortar
Same 6:1:1 sand/cement/lime standard mortar mix
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29th March 2008, 07:18 PM #4
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31st March 2008, 07:54 AM #5
Owner Builder
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Thanks for the advice guys, I should be right now.
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31st March 2008, 12:35 PM #6
Most bricklaying mortars are 6 sand, 1 cement, 1 lime
White washed sand, White cement, lime will give you a very stark white mortar
White washed sand is very hungry too.
Off white cement will be either a Ice Blue or Ice Green clinker. Mixed with white washed sand you will get either a green or blue tint mortar.
If I was to do my own house, I would use 3 white washed sand, 3 yellow plasterers sand, 1 white cement, 1 lime all guaged with a bucket.
White white is a bit stark in my eyes. The plasterers sand tones it down a little.
Both white washed sand & Plasterers sand are harsh aggregates with little loam. The loam tints the mortar yellow a little especially when it gets wet.
You may have to put a "small" (under dose with some aeration agent) "clear calair" amount to increase the workability with the harsh aggregates.
Some blended cements have higher fly ash content which produces a silver finish. Hydrochloric acid doesn't react with fly ash to well either so harder to clean.
Ideally a white sand of 60 microns is good but that is an expensive exercise.
Do a sample panel to see what "you" like.c2=a2+b2;
When buildings made with lime are subjected to small movements thay are more likely to develop many fine cracks than the individual large cracks which occur in stiffer cement-bound buildings. Water penetration can dissolve the 'free' lime and transport it. As the water evaporates, this lime is deposited and begins to heal the cracks. This process is called autogenous healing.
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3rd April 2008, 08:20 PM #7
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