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Environmental Impact - Lime has a much
lower 'embodied energy' that cement. Cement is also cut with
many toxic chemical additives.
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Greenhouse Gases - Lime reabsorbs the
carbon dioxide released during manufacturing as it sets.
Cement releases large amounts of carbon dioxide into the atmosphere.
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Biodegradable - Lime will convert back to
its raw form - calcioum carbonate, and can even be removed, re-wet
and re-mixed. Cement is a one way material.
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Compatible with Earth - Lime has similar
properties as earth. Lime will expand and contract at the same
rate as earth. It also shares earths characteristics of being
soft and 'breathable.' Cement is hard and brittle.
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Health Considerations - Lime is hygroscopic - can absorb and
release moisture - helping to prevent condensation, the main cause
of fungi and moulds. Lime is highly alkaline, and therefore
naturally anti-bacterial, anti-fungal and antiseptic. Chemical
paints off-gas toxins linked to breathing disorders and cancers.
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Forgiving Medium - As Lime sets slower than
cement, a lime plaster can be re-wet and re-worked up to 24 hours
after applying to 'fix' mistakes. The carbonation process as
it dries will sometimes even self-heal cracks!
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