Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 245, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.118409
Keywords
Historic mortars; Repair mortars; Slaked lime; Cocciopesto; Brick powder; Natural hydraulic lime; Cement mortars; Inorganic consolidants; Hydroxyapatite; Calcium phosphates
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The present study investigates the strengthening ability and the compatibility of two different ammonium phosphate solutions used for consolidation of mortars based on slaked lime, natural hydraulic lime or cement, to resemble historic and modern mortars. After impregnation for 24 h, new calcium phosphate phases were detected in all types of mortar. New calcium phosphates induced significant mechanical consolidation, with only slight alterations in the pore system and in water transport properties. In lime-based mortars (initially white) no color alteration was visible after treatment, while colored mortars experienced some color change when the more concentrated phosphate solution was used. (C) 2020 Elsevier Ltd. All rights reserved.
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