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Received July 12, 2011
Accepted September 27, 2011
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Preparation of environmental-friendly lime paints from hydrated lime and hydrated light burned dolomite
Dae Ju Hwang1 2
Young Hwan Yu1
Seung Kwan Lee1
Moon Kwan Choi1
Kye Hong Cho1
Ji Whwan Ahn3
Choon Han4†
Jong Dae Lee2
1Korea Institute of Limestone and Advanced Materials, 18-1, Udeok-gil, Maepo-up, danyang-gun, Chungbuk 395-903, Korea 2Department of Chemical Engineering, Chungbuk National University, 410, Sungong-ro, Heungduk-gu Chung-ju, Chungbuk 361-763, Korea 3Mineral Processing Department, Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources, 92-Science-ro, Yuseong-gu, Daejeon 305-350, Korea 4Department of Chemical Engineering, Kwangwoon University, 447-1, Wolgye-dong, Nowon-gu, Seoul 139-701, Korea
chan@kw.ac.kr
Korean Journal of Chemical Engineering, June 2012, 29(6), 823-829(7), 10.1007/s11814-011-0252-9
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Abstract
Environment-friendly lime paints were prepared from 38 wt% slurries of hydrated lime (Ca(OH)2) and hydrated light burned dolomite (Ca(OH)2·Mg(OH)2). These materials and the resulting paints’ antibacterial and antimold properties were investigated. The hydrated lime used in this study contained 97 wt% Ca(OH)2, which implies a 71.85 wt% equivalence of CaO. This 71.85 wt% CaO content was responsible for the antibacterial and anti-mold characteristics. The antibacterial and anti-mold characteristics of the hydrated light burned dolomite were attributed to its 56 wt% CaO and 44 wt% MgO contents. The antibacterial-reducing activities of 38 wt% hydrated lime and hydrated light burned dolomite slurries were found to be 99%. Their anti-mold activities against mixed strains were outstanding. Lime paints produced from the slurries and various additives also showed 99% antibacterial activity and outstanding anti-mold activity. The paints’ low total volatile organic compounds (TVOCs) releases were graded as excellent. Their formaldehyde (HCHO) releases were classed as best through excellent, indicating their suitability as environment-friendly building materials.
Keywords
References
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