The long-term engineering properties nnd sustainability indices of dewatering Hydrated lime mortars through jacaranda seed pods

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Dilara Ayasgil_MSc_Thesis.pdf

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2022-2-11

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Ayasgil, Dilara

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Concrete, after water, is the most widely used material on the world, according to the World Business Council for Sustainable Development. One ton of cement production results in approximately 0.9 tons of CO2 emissions. Although the compatibility of hydrated lime in masonry is well comprehended in the literature, the unsuccessful replacement of lime with cement is a common challenge that introduces various problems, particularly in the conservation and restoration of historic masonry. The thesis begins with investigating the properties of hydrated lime mortars comprising Jacaranda waste collected from the METU Northern Cyprus Campus (NCC). METU NCC, used as the base location in this thesis. There are nearly 190 Jacaranda trees that produce this waste in enormous amounts every fall on Campus. In practice, the addition of powdered Jacaranda seed pods and silica fume to establish mortar-masonry optimization modified the low water retaining qualities of hydrated lime mortars, leading to insufficient bond development with the succeeding substrate. Although there have been numerous studies on incorporating agricultural waste in cement-based products, no studies on the incorporation of Jacaranda seed pods on construction materials have been published. The study presents verified experimental research findings on the use of Jacaranda seed pods as a binder alternative in hydrated lime mortars, emphasizing the influence of dewatering on long-term engineering characteristics and sustainability indices. According to the thesis, the degree of dewatering experienced at the freshly mixed stage defines the authentic performance of hydrated lime mortars in masonry construction and dictates the verifiable sustainability analysis to be performed.

Subject Keywords

Cement, Lime compatibiliy, Jacaranda, Dewatering, Sustainability

URI

https://hdl.handle.net/11511/96801

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Northern Cyprus Campus, Thesis

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Citation Formats

D. Ayasgil, “The long-term engineering properties nnd sustainability indices of dewatering Hydrated lime mortars through jacaranda seed pods,” M.S. - Master of Science, Middle East Technical University, 2022.