Lime plaster that were sculpted with lime plaster over armatures of reeds and twine. They were made in the pre-pottery neolithic period, around 7200 BC. The fact that these sculptures have lasted so long is a testament to the durability of lime plaster. Lime plaster Lime plaster is a type of plaster composed of sand, water, and lime, usually non-hydraulic hydrated lime (also known as slaked lime, high calcium lime or air lime). Ancient lime plaster often contained horse hair for reinforcement and pozzolan additives to reduce the working time. Traditional non-hydraulic hydrated lime only sets through carbonatation when the plaster is
Cowell Lime Works the company, and it became Henry Cowell and Co. Operations and land acquisitions continued to expand over the next twenty years; encompassing expanded lime production, cattle and milk cows, bituminous rock mining, tan oak bark (used in leather tanning), grain and fruit. In 1898, the company incorporated as the Henry Cowell Lime and Cement Company. The transition to Portland cement, which could be used to manufacture mortar superior to lime-based mortar, began the decline of the lime industry after the start of the 20th century. Henry Cowell's son Harry finally shut down the Bay Street kilns in about 1920. By