3/1/2024 0 Comments Stucco vs plaster![]() It will repel water and keep the straw inside nice and dry. Nonetheless, we have been told that lime plaster is a better cover for straw bale because of its hydrophobic properties. The limestone content of Portland cement is generally 80 percent or higher. (Making lime only needs a mere 1800 degrees F.) It become Portland cement by heating in a rotary kiln till the minerals are molten at 2600 degrees F. It is made up of clinker, which is small lumps of limestone and clay (alumino-silicate) ground with the addition of gypsum (calcium sulfate). Portland cement is not completely different from lime plaster. We can mist the west wall without scaffolding. Anyone who has watched a modern building go up knows how speed is the prime driver. Builders jumped at the chance to work with a material that set up much more quickly. Lime plaster fell out of vogue when Portland Cement came along in the 1800’s and beat out lime plaster with a take-no-prisoners ferocity. ![]() When this powder is soaked in water (a process known as slaking), the calcium oxide reacts with the CO2 in the air to become calcium carbonate again, which meanss a lime stucco house is covered in a thin, smooth shell of stone, which will keep getting harder as the chemical transformation slowly continues. When burned at high temperatures, limestone releases water and carbon dioxide, and its main ingredient, calcium carbonate, is turned into calcium oxide – aka quick lime. There is a lot of limestone in Wisconsin, and our lime came from not too far away in Manitowoc. Lime plaster is made from limestone, a sedimentary rock, formed out of the skeletons of ancient marine micro organisms. Lime basically held the built world of beams and bricks together and often provided an attractive, weather-proof exterior coating. Lime has been the binder of choice for the most beautiful, old European buildings, and archeologists can date lime plaster use back 6000 years in Turkey. The plaster, however, is old school lime plaster – the kind that buildings have been made of for thousands of years. Old world lime plaster is applied over high-tech steel lathe.
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