CONCRETE RESEMBLING GRANITE.
By the use of mica, concrete work is said to have been made that bears a strong resemblance to granite. For surfacing concrete it has proved very effective. About five pounds of mica are sufficient to cover 100 square feet. •The electric light columns in Lincoln Park, Chicago, were treated in this way. Crushed reel granite was Tised with the mica, so that the finished surface had the appearance of polished granite. The granite and mica surfacing material were applied to the inner surface of the square iron trough in which the columns were cast, and after their removal the posts were scrubbed with mica, which removed the sand from the surface of the mica particles, when the surface showed a close resemblance to granite.
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Rodney and Otamatea Times, Waitemata and Kaipara Gazette, 18 September 1912, Page 7
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128CONCRETE RESEMBLING GRANITE. Rodney and Otamatea Times, Waitemata and Kaipara Gazette, 18 September 1912, Page 7
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