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

2022-2-11
Ayasgil, Dilara
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.

Suggestions

A study on blended bottom ash cements
Kaya, Ayşe İdil; Yaman, İsmail Özgür; Hoşten, Çetin; Department of Cement Engineering (2010)
Cement production which is one of the most energy intensive industries plays a significant role in emitting the greenhouse gases. Blended cement production by supplementary cementitious materials such as fly ash, ground granulated blast furnace slag and natural pozzolan is one of the smart approaches to decrease energy and ecology related concerns about the production. Fly ash has been used as a substance to produce blended cements for years, but bottom ash, its coarser counterpart, has not been utilized du...
A study on the early-strength improvement of slag cements
Akgün, Erdinç; Yaman, İsmail Özgür; Department of Cement Engineering (2009)
Use of alternative raw materials, especially industrial by-products, is necessary for a sustainable cement industry. By replacing clinker with industrial by-products, consumption of natural resources and energy is decreased. Therefore, both economical and environmentally friendly cements are produced. Several industrial by-products such as fly ash, silica fume, and slag, one of the most widely used industrial by-products, can be used to produce standard blended cements. Besides its many advantages, slag cem...
Comparison of the strength developments of interground and separately ground marble-incorporated cement mortars
Kava, İsmail Tolga; Erdoğan, Sinan Turhan; Hoşten, Çetin; Department of Cement Engineering (2013)
Production of Portland cement clinker contributes significantly to global warming and has a large environmental footprint. To reduce the amount of kiln-produced clinker in cement, the use of substitute natural or industrial waste materials has been gaining popularity. The use of CaCO 3- containing natural materials such as limestone and waste marble pieces has been increasing around the world, particularly after modifications made to cement production standards. Two types of marble-containing blended Portla...
Low-energy alinite cement production by using soda waste sludge
Uçal, Gültekin Ozan; Tokyay, Mustafa; Department of Civil Engineering (2016)
Increased environmental awareness and the concept of sustainable development have impacts on cement industry as on many other fields. Alinite cement which was developed in the 1970s may be an alternative inorganic, low energy binding material. In this study, synthesis and optimization of the properties of alinite cement was carried out by using soda waste sludge as a raw material. Soda waste sludge was mixed with limestone, clay, and iron ore in different proportions. All mixes were burned at 1050oC or 1150...
Utilization of soda and beer wastes in cementitious systems
Aleessa Alam, Burhan; Yaman, İsmail Özgür; Department of Cement Engineering (2009)
To maintain the sustainability of cement and concrete production, there is a trend to use wastes in their production. Soda waste, generated by soda ash production process, and beer waste, generated by beer filtration process, are two locally produced wastes in Turkey and many other countries. The nature of these wastes, mostly their fineness, makes them possible to be used in concrete production, especially as a viscosity modifying agent in the self consolidating type of concrete. In this study, the additio...
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.