hello... i have a question for you regarding the process:
From what I heard from a few industrialist, 'the amount of heat' of any quicklime have, deteriorates over time, counted since it became quicklime from raw limestone. So does this means any company selling quicklime should sell the products fast before the heat completely deteriorates and became calcium carbonate back?
The Brits have a long tradition, and therefore, a wealth of information on restoring old masonry. Unfortunately, we Americans have a less than adequate tradition of proper restoration techniques for our valuable 18th and 19th century structures. In particular, we need to keep getting the word out to owners of historic properties. It's not like you can go to Home Depot for a bag of Sakrete.
Slaked lime, or calcium hydroxide, is unusual in that it is more soluble in cold water than in hot water. The solution - lime water - is used as the characteristic test for carbon dioxide - calcium carbonate precipitates out. Of course, this is another use.
I calcined some limestone at school and then slaked it, when I was about 15.
Thanks for this! I have a test coming up in a week and one of the subjects is limestone, quicklime and slaked lime. The video and the comments you left are really helpful so thanks again.
You would allow the putty to age by putting it in a pit or buckets. Over time the "lime" will settle to the bottom and get richer and denser, and the water will evaporate off. This putty (a bit thicker than cream cheese) would be mixed with sand. The aging process can take about 6 weeks, but can continue to age indefinately.
wow! cool video never seen this done before i heard that people before had kept lime putty even for decades nd just gets better and better. What's the difference between this product and commercial powdered hydrated lime? cheers
No, there is no "external" heat source. When you slake quicklime (or burned limestone) an exothermic or "heat generating" reaction takes place. And yep, that's just plain water. This lime would be combined with sand to make mortar and plaster for building (before the late 1800's to the early 1900's
Some of my masonry school teachers started when this was dying out as a regular practice with bricklayers. One mentioned how dangerous this stuff is and that it could blind you if you got it into your eyes.
So, prior to this you would burn the limestone in what?
The limestone is burned in a lime kiln. We use only wood as a fuel source and the process of calcining (burning off of CO2 and water) takes approximately 18-24 hours. I hope to have a video of that process up in the next few weeks.
hello... i have a question for you regarding the process:
From what I heard from a few industrialist, 'the amount of heat' of any quicklime have, deteriorates over time, counted since it became quicklime from raw limestone. So does this means any company selling quicklime should sell the products fast before the heat completely deteriorates and became calcium carbonate back?
denissianto 6 months ago
The Brits have a long tradition, and therefore, a wealth of information on restoring old masonry. Unfortunately, we Americans have a less than adequate tradition of proper restoration techniques for our valuable 18th and 19th century structures. In particular, we need to keep getting the word out to owners of historic properties. It's not like you can go to Home Depot for a bag of Sakrete.
haleslea 7 months ago
Slaked lime, or calcium hydroxide, is unusual in that it is more soluble in cold water than in hot water. The solution - lime water - is used as the characteristic test for carbon dioxide - calcium carbonate precipitates out. Of course, this is another use.
I calcined some limestone at school and then slaked it, when I was about 15.
pmr1973 8 months ago
looks like hot, caustic cottage cgesse.....YUM
Liam
liamg1995 1 year ago
It is amazing stuff for cleaning out your lungs if you smoke roll ups ! not fun if you get a bit down your glove!
harrycarterjonas 1 year ago
chemistry is funny thing :)
Kokosiak1 2 years ago
you can paint with this
retarder05 2 years ago
cool!! thanks for the upload.. Is it realy needed to put water while the lime is still hot? Is it ok to mix water even the lime is already warm?
PacmanBigFan 2 years ago
Thanks for this! I have a test coming up in a week and one of the subjects is limestone, quicklime and slaked lime. The video and the comments you left are really helpful so thanks again.
Aerodynamics123 3 years ago
So, how long would you normally wait until you would add the sand? Do you wait for it to dry?
Jesusisyhwh 3 years ago
You would allow the putty to age by putting it in a pit or buckets. Over time the "lime" will settle to the bottom and get richer and denser, and the water will evaporate off. This putty (a bit thicker than cream cheese) would be mixed with sand. The aging process can take about 6 weeks, but can continue to age indefinately.
virginialimeworks 3 years ago
wow! cool video never seen this done before i heard that people before had kept lime putty even for decades nd just gets better and better. What's the difference between this product and commercial powdered hydrated lime? cheers
gasnet2 2 years ago
No, there is no "external" heat source. When you slake quicklime (or burned limestone) an exothermic or "heat generating" reaction takes place. And yep, that's just plain water. This lime would be combined with sand to make mortar and plaster for building (before the late 1800's to the early 1900's
virginialimeworks 3 years ago
Some of my masonry school teachers started when this was dying out as a regular practice with bricklayers. One mentioned how dangerous this stuff is and that it could blind you if you got it into your eyes.
So, prior to this you would burn the limestone in what?
Jesusisyhwh 3 years ago
The limestone is burned in a lime kiln. We use only wood as a fuel source and the process of calcining (burning off of CO2 and water) takes approximately 18-24 hours. I hope to have a video of that process up in the next few weeks.
virginialimeworks 3 years ago
So, is the box already heated? Also, is that just plain water you are adding at the beginning?
Jesusisyhwh 3 years ago