Impact of Hardening Methods on the Moulding Sand’s Properties with Gypsum Binder

• Autorzy: Granat K. , Paduchowicz P. , Dziedzic A. , Jamka M. , Biały P.

Identyfikatory

DOI

10.24425/afe.2020.133342

• Języki publikacji: EN

Abstrakty

EN

The research paper presents the results of testing the strength and technological properties of molding sand with gypsum binder, the bonding process proceeded: naturally or conventionally. The tests included mass containing (parts by weight): 78 pbw. Grudzeń-Las quartz sand, 22 pbw. plaster gypsum "Dolina Nidy” and 9 pbw. water. Measurements of compressive strength, shear, tensile and bending as well as permeability and looseness were carried out on standard cylindrical samples kept in the air for 1-96 hours or dried at 110oC for 1-8 hours. The results of the analysis were analyzed in connection with the mass structure and construction binding bridges warp grains observed with a scanning microscope (SEM). The influence of drying intensity on the bonding process and related mass properties has been demonstrated, especially from the point of view of the possibility of selection and / or intensification of a specific curing method for use in the production of gypsum binger molds and cores.

Słowa kluczowe

EN

foundry; gypsum binder; foundry masses; core mass; masses properties

PL

odlewnia; spoiwo gipsowe; masy odlewnicze; masa rdzeniowa; właściwości masy

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2020
• Tom: Vol. 20, iss. 4
• Strony: 13--17
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Granat K.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology

autor

Paduchowicz P.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology

autor

Dziedzic A.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology

autor

Jamka M.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology

autor

Biały P.

• Department of Foundry Engineering, Plastics and Automation, Wroclaw University of Technology

Bibliografia

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• [3] Sayonara, M., Pinheiro, M. & Camarini G. (2015). Characteristics of Gypsum Recycling in Different Cycles. International Journal of Engineering and Technology. 15(7), 215-218. DOI: 10,7763/IJET.2015.V7.794.
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• [5] Lou, W., Guan, B. & Wu, Z. (2011). Dehydration behawior of FGD gypsum by simoltaneous TG and DSC analysis. J Therm Anal Calorim. 11(104): 661-669. DOI 10.1007/s10973-010-1100-6.
• [6] Fukami, T., Tahara, S., Nakasone, K. & Yasuda, C. (2015). Synthesis, Crystal Structure, and Thermal Properties of CaSO4∙2H2O Single Crystals. International Journal of Chemistry. 15(2). 12-20.
• [7] Dziuba, M. & Cholewa, M. (2006). Ceramic core of open cellular skeletal cast. Archives of Foundry Engineering. 6(22), 170-176.
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• [9] Pawlak, M. (2010). The influence of composition of gypsum plaster on its technological properties. Archives of Foundry Engineering. 10(4), 55-60.
• [10] Pawlak, M. (2010). The influence of the conditions of gypsum plaster preparation on its technological pro-perties. Archives of Foundry Engineering. 10(2), 95-98.
• [11] Blajerska, P. (2016). Determination of the possible applicability of microwave in production of casting plaster mould. Unpublished master thesis, Wroclaw University of Science and Technology, Wrocław, Poland. (in Polish).
• [12] Paduchowicz P., Stachowicz M., Baszczuk A., Hasiak M., Granat K. (2020). „Evaluation of the Chemical Composition, TG – DTA and Tensile Strength Tests of Commercial Gypsum Kinds for Foundry Sandmixes Application”. Archives of Foundry Engineering. 2(20), 59-64.
• [13] Dolina Nidy company catalog (2013 Juli). Technical data sheet. Retrieved Januar 7, 2016, from http://www.dolina-nidy.com.pl/images/stories/pdf/gb.pdf.
• [14] Doroshenko, V. (2018). Foundry publication as an environment for nature-like technologies. Customs products. 2(91), 23-28. (in Russian).
• [15] Bilici, I. (2018). Alternative Evaluation of Synthetic Gypsum with Waste Polyethylene. Transactions on Science and Technology. 5(4), 239-244.
• [16] Regulska, K. & Repelewicz, A. (2019). Properties of gypsum composites with sawdust. E3S Web of Conferences. 97(02037). 1-5. DOI:10,1051/e3sconf/20199702037.
• [17] PN-83 / H-11070
• [18] PN-83 / H-11073
• [19] PN-83 / H-11072
• [20] Dziedzic, A., (2020). Impact of natural drying time on strength and technological parameters of samples with gypsum binder. Unpublished master thesis, Wroclaw University of Science and Technology, Wrocław, Poland. (in Polish).
• [21] Jamka, M., (2020). Selection of method for hardening proecological molding sands with gypsum binder for making castings for the automotive industry, Unpublished master thesis, Wroclaw University of Science and Technology, Wrocław, Poland. (in Polish).