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To make lime plaster, limestone (calcium carbonate) is heated above approximately 50 °C to produce quicklime.

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To make lime plaster, limestone (calcium carbonate) is heated above approximately 50 °C to produce quicklime.

(a) True

(b) False

The question was posed to me in an international level competition.

My query is from Analysis of Rates of Plastering and Pointing in portion Analysis of Rates of Civil Engineering Drawing

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Correct choice is (b) False

Explanation: To make lime plaster, limestone (calcium carbonate) is heated above approximately 850 °C to produce quicklime. Water is then added to produce slaked lime (calcium hydroxide), which is sold as a wet putty or a white powder. Additional water is added to form a paste prior to use. The paste may be stored in airtight containers.

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