An old informative film from 1956 explaining the purpose of lime in mortar. Still applies today. Sponsored by Millard Quarries in Annville, Pennsylvania.
This is an incredible video, thank you for posting. Can't believe I'm the only one to comment. This should be seen by everyone who works in any type of home construction.
18:30 "As a good general all purpose mortar a mix of 1 part portland cement, 2 parts lime, and 7 to 9 part sand is recommended" This is 2,5 N/mm², which is about 362 PSI A brick has about 12 N/mm2 ca. 1740 PSI strength. It may vary. We can use 1:1:6 rato, which gives 5 N/mm2 approx. 724 PSI We can use 1 part portland with 4 part sand, this gives 10N/mm2 approx 1448 PSI. This has so high strenght, that if a building is slowly moving, the bricks can be damaged. There are many kind of cement available, the smaller are the grinded particles of the portland, the higher is the strenght after 28 days. From the higher strenght cement we need smaller amount then from a weaker one. The sand is also important. 0-1mm "open-pit" sand (0-0.04 inch) is good for high lime contained mortar. The clay and organic content has to be washed off before use. 0-2 mm "river" sand (0.08 inch) is better for higher cement content mortar. The particle distrubution (from smaller to higher) is more consistent than the other one.
I have been watching a lot of home restoration videos about fixing old buildings in England and Peter Ward videos. I was just looking on youtube to see how people from olden times like 1762 and 1500 got their lime. I was thinking that they just got it from the ashes of their fires, but sometimes I think it is crushed limestone. I know that crushed limestone is a component of red barn paint that was made by farmers for at least the past 200 years. So how did these builders of olden times get their lime, and what is the ideal mixture to fix an old barn foundation of field stone and flagstone? The barn was built about 1850 in Western New Yor State.
@@HollywoodCreeper Hello! There got the lime stone from some montains. And they burned it in kiln, like this video: ua-cam.com/video/wXQS105fAwY/v-deo.html
This is an incredible video, thank you for posting. Can't believe I'm the only one to comment. This should be seen by everyone who works in any type of home construction.
Do you have a link to the study by the Franklin Institute?
Great video, thanks for keeping it in circulation.
Agree with this guy
If the building at 1:15 isn't already demolished I bet it soon will be, less then 70 years later... put stuff into perspective.
Awesome thanks. Far superior to any modern video. I could also quite easily drift off to sleep with that guy's voice..
18:30 "As a good general all purpose mortar a mix of 1 part portland cement, 2 parts lime, and 7 to 9 part sand is recommended"
This is 2,5 N/mm², which is about 362 PSI
A brick has about 12 N/mm2 ca. 1740 PSI strength. It may vary.
We can use 1:1:6 rato, which gives 5 N/mm2 approx. 724 PSI
We can use 1 part portland with 4 part sand, this gives 10N/mm2 approx 1448 PSI. This has so high strenght, that if a building is slowly moving, the bricks can be damaged.
There are many kind of cement available, the smaller are the grinded particles of the portland, the higher is the strenght after 28 days. From the higher strenght cement we need smaller amount then from a weaker one.
The sand is also important. 0-1mm "open-pit" sand (0-0.04 inch) is good for high lime contained mortar. The clay and organic content has to be washed off before use.
0-2 mm "river" sand (0.08 inch) is better for higher cement content mortar. The particle distrubution (from smaller to higher) is more consistent than the other one.
I have been watching a lot of home restoration videos about fixing old buildings in England and Peter Ward videos. I was just looking on youtube to see how people from olden times like 1762 and 1500 got their lime. I was thinking that they just got it from the ashes of their fires, but sometimes I think it is crushed limestone. I know that crushed limestone is a component of red barn paint that was made by farmers for at least the past 200 years. So how did these builders of olden times get their lime, and what is the ideal mixture to fix an old barn foundation of field stone and flagstone? The barn was built about 1850 in Western New Yor State.
@@HollywoodCreeper Hello! There got the lime stone from some montains. And they burned it in kiln, like this video:
ua-cam.com/video/wXQS105fAwY/v-deo.html