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Roughcast or pebbledash is a durable coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand, small gravel and often pebbles or shells. [1] The materials are mixed into a slurry and are then thrown at the working surface with a trowel or scoop.
Sandblasting can be used to refurbish buildings or create works of art (carved or frosted glass). Modern masks and resists facilitate this process, producing accurate results. Sandblasting techniques are used for cleaning boat hulls, as well as brick, stone, and concrete work. Sandblasting is used for cleaning industrial as well as commercial ...
Of the highly reactive materials, only clay-based wall plaster combines very low yields with high ozone removal rates. Clay wall plaster exhibited very high deposition velocities and negligible yields. Clay and materials containing clay (e.g. bricks) consume ozone readily, perhaps because of a reaction catalyzed by metals present in the clay.
Stucco used as an exterior coating on a residential building. Rock dash stucco used as an exterior coating on a house on Canada's west coast. The chips of quartz, stone, and colored glass measure approx. 3–6 mm (1/8–1/4"). The basic composition of stucco is lime, water, and sand. [4]
In paint-stripping, ice blasting is used to overcome the cohesive bond of the coating. Depending on the paint or makeup of the bond, some coatings cannot be cleaned. Ice blasting is useful in removing lead paint, as it poses the least danger. Ice blasting has the lowest level of airborne contaminants for blasting technology in removing lead paint.
There are various lead abatement techniques to remove residential lead-based paint and lead in household dusts. Encapsulation and enclosure makes the hazard of lead-based paint inaccessible, while chemical stripping, removal of abrasives, scraping with the hand, and component replacement are effective in permanently removing lead-based paints from households. [5]