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Role of Organic Gum on Hydrated Phases of Lime and Cement Mortar

Author(s): S. Thirumallini, R. Ravi, Anil Girgoswami and S. Kumaravadivel

The study was carried out to find the role of organic gums from Drumstick (Moringa Oleifera), Badam (Prunusdulcis), Kikar (Vachellia Karroo) trees on cement and lime paste. Organic tests were conducted on the gum to unearth the amount of proteins, fat and carbohydrate. All gums does not contain fat with around 1% protein. Drumstick contains highest percentage of Carbohydrate while Kikar and badam with around 15%. The Lime and cement were mixed with 8% of of badam gum, 12% of kikar gum and 16% of drumstick gum individually and balls were made based on their binding property. In XRD results, Cement mortar with Kikar is found to have β-Belite (C2S), which is the strength phase in comparison with Badam and Drumstick. The other hydrated phases in cement mortar are Calcite, Calcium Hydroxide, Calium Aluminate and Triclinic Alite. The principal compounds formed with lime and organic gums are Calcium Aluminate, Calcite, Brucite, β-Belite, Triclinic Alite and Calcium hydroxide. The XRD analysis, the percentage of calcite is very high in Lime mortar with Badam.

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