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Hot lime mortar

July 19, 2017 / specialistplastering

A short clip showing our lime mortar being mixed for rebuilding of historic mixed masonry walls. Using Quicklime, sharp sand and brick dust.

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The lime cycle Limestone (calcium carbonate) when baked at between 800 and 1000 degrees Celsius releases water and co2 (carbon dioxide) to become quicklime (calcium oxide) When water is then added it is converted into slaked lime (calcium hydroxide) As the water is evaporated during curing the calcium hydroxide absorbs co2 and returns to its original state of calcium carbonate (limestone). Calcium hydroxide will only absorb co2 with the presence of moisture. Using lime as a binder with aggregate produces a very good breathable material.of varying strengths dependant on aggregate, curing and mix ratio. The co2 released during the burning stage is reabsorbed from the atmosphere during curing. The co2 required to produce the heat is much less than required for cement manufacture. #conservation #restoration #lime #wirral #Cheshire #liverpool #traditional #plastering

WHY WOULD ANYBODY TRY TO INJECT A CHEMICAL DPC INTO A SANDSTONE WALL? This was on another part of the property, the pointing here is cement, nothing to do with us but somebody in the past has clearly tried injecting a chemical DPC into the stonework. The building was built or renovated around 40 years ago using reclaimed sandstone built with sand and cement. I believe the interior has been ranked with a cement coating as well. #conservation #restoration #lime #wirral #Cheshire #liverpool #traditional #damp #twat

It's good to be back in the lime! Removed the nasty cement pointing and Repointed this old sandstone garden wall with a nicely graded local aggregate and nhl3.5 lime. Glorious weather for it too. #conservation #restoration #lime #wirral #Cheshire #liverpool #traditional #nhl

A few hours spent removing ivy and overgrown trees from this old barn during a condition survey should make enabling works a little easier for us later in the year. Ivy growth on buildings may seem pretty but left to grow can lead to the destruction of historic buildings. #conservation #restoration #lime #wirral #Cheshire #liverpool #traditional

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