Properties of geopolymers produced with sugar plant waste

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Topçu İ. B., Sofuoğlu T.

Geopolymeric Composites Congress, (GEC-2021), Erzurum, Turkey, 29 - 30 December 2021, vol.1, pp.49-60

  • Publication Type: Conference Paper / Full Text
  • Volume: 1
  • City: Erzurum
  • Country: Turkey
  • Page Numbers: pp.49-60
  • Eskisehir Osmangazi University Affiliated: Yes


Since limestone is a raw material that is easily and abundantly found in nature, it can also be used in the sugar industry at different stages in the production process. Limestone supplied from the market contains at least 95% CaCO3. In sugar process; limestone, together with coke, is loaded from the top into the cylindrical lime kiln and taken as lime from the bottom of the lime kiln after approximately 36 hours. The resulting lime is quenched with hot water, filtered and used in the production of juice. Hydratic lime is obtained in the consistency of limewash. Raw juice at a certain temperature obtained from beet and lime are mixed in apparatus. Precipitation is provided with colloidal substances in the raw juice. Excess lime added to the juice is removed from the juice with CO2 in the carbonation (saturation) boilers. The mud part of the muddy juice taken from here is precipitated in decanters. The settled muddy part is filtered with the help of press filters. The soil containing approximately 70%-80% dry matter coming out of the press filters is called “Press Filter Waste (PFW)”. In this study, the waste material called Press Filter Waste (PFW) was used in different proportions together with fly ash and their effects on the mortar properties were investigated. For this purpose, a control mortar was prepared in laboratory condition according to the standards. While the other test mortar samples were being prepared, the binder ratio was kept constant and fly ash (FA) and PFW was used in different ratio. The effects of different ratio at different curing conditions of PFW and FA in the mortars on the properties of hardened mortar; hardened unit weight, ultrasound pulse velocity and compressive strength, were evaluated.