Influence of Binding Rates on Strength Properties of Moulding Sands with the GEOPOL Binder

Open access


The results of investigations of moulding sands with an inorganic binder called GEOPOL, developed by the SAND TEAM Company are presented in the paper. Hardeners of various hardening rates are used for moulding sands with this binder. The main aim of investigations was determination of the influence of the hardening rate of moulding sands with the GEOPOL binder on technological properties of these sands (bending strength, tensile strength, permeability and grindability). In addition, the final strength of moulding sands of the selected compositions was determined by two methods: by splitting strength and shear strength measurements. No essential influence of the hardening rate on such parameters as: permeability, grindability and final strength was found. However, the sand in which the slowest hardener (SA 72) were used, after 1 hour of holding, had the tensile and bending strength practically zero. Thus, the time needed for taking to pieces the mould made of such moulding sand will be 1.5 - 2 hours.

[1] Holtzer, M. (2011). Global trends and development in the field of molding and core in terms of environmental impact. Przegląd Odlewnictwa. 61(3-4), 112-121.

[2] Holtzer, M., Grabowska, B. (2008). Modern sand moulds with inorganic binder. Conference Materiale XI Foundry Conference TECHNICAL, 29-31.05.2008, (pp. 93-98). Nowa Sól.

[3] Polzin, H. (2009). Tagungsergebnisse der WFO - Kommission 1.6. „Anorganische chemische Binder” 2008, Giesserei 96, 08/2009, 66-68.

[4] Müller, J., Stötzel, R. (2008). New innovative solutions for foundries by inorganic concepts. 68th WFC - World Foundry Congress, 7th - 10th February 2008, 133-136.

[5] Müller, J., Weicker, G. & Körschgen, J.(2007). Serieneinsatz des anorganischen Bindemittelsystems INOTEC im Leichtmetallguss. Giesserei - Praxis. 5, 192-194.

[6] Głód, A. (2007). Inorganic binder CORDIS - technology and machine. Conference Materials X Foundry Conference TECHNICAL 2007, 149-158.

[7] Lochte, K. & Bochm, R. (2006). Properties and experience of an inorganic binder. Foundry Trade Journal February. 180(3631), 28-30.

[8] Holtzer, M., Dańko, R. (2013). The Assesment of Harmfulness of Binding Materials Used for a New Generation of Core and Molding Sands. Kraków: Scientific Publishing AKAPIT.

[9] Steinhäuser, T. & Wolff, A. (2007). AWB - Une technologie de noyautage respectueuse de l’environnement. Homes & Fonderie. Septembre. 377, 11-15.

[10] Wolff, A. & Steinhäuser, T. (2005). Environmentally compatible core making with AWB process. Foundry Trade Journal. R(179), March, 57 .

[11] Zitian, F. (2010). Performance Characteristics of the Sodium Silicate Sand Hardened by Twice Microwave Heating Process. Proceedings of 69th World Foundry Congress, October 16-20, (pp. 0654-0659). Hangzhou China.

[12] Pezarski, F., Smoluchowska, E., Izdebska - Szanda, I. (2008). The use of geopolymeric binder for production of iron alloy casting, The Works Foundry Research Institute in Cracow. XLVIII(2), 19-34.

[13] Instructions for use of inorganic geopolymers system to selfhardening sands. Chemical Plant "Rudniki" SA.

[14] Safety Data Sheet for Geopol 510, Geopol 515, 618 Geopol by regulation UE nr 453/2010.

[15] Jelinek, P. & Skuta, R. (2003). Modifikovane sodne silikaty, nova alternativa anorganickych slevarenskych pojiv. Materials Engineering. 10(3), 283-286.

[16] Burian, A., Novotny, J. (2008). Production of molds and cores of ecological systems spoiwowym. Conference Materials XI Foundry Concerence TECHNICAL, 29-31.04.2008, (pp. 81-91). Nowa Sól.

[17] Fridrich, R. & Jelinek, P. (2008). Polysialates binders preparation and their influence to shear strength of foundry sand mixtures. Archives of Foundry Engineering. 8(2), 37-40.

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

Journal Information

CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316

Cited By


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 198 198 18
PDF Downloads 64 64 6