Assessment criteria of bentonite binding properties

• Autorzy: Żymankowska-Kumon S.
• Języki publikacji: EN

Abstrakty

EN

The criteria, with which one should be guided at the assessment of the binding properties of bentonites used for moulding sands, are proposed in the paper. Apart from the standard parameter which is the active bentonite content, the unrestrained growth indicator should be taken into account since it seems to be more adequate in the estimation of the sand compression strength. The investigations performed for three kinds of bentonites, applied in the Polish foundry plants, subjected to a high temperature influences indicate, that the pathway of changes of the unrestrained growth indicator is very similar to the pathway of changes of the sand compression strength. Instead, the character of changes of the montmorillonite content in the sand in dependence of the temperature is quite different. The sand exhibits the significant active bentonite content, and the sand compression strength decreases rapidly. The montmorillonite content in bentonite samples was determined by the modern copper complex method of triethylenetetraamine (Cu(II)-TET). Tests were performed for bentonites and for sands with those bentonites subjected to high temperatures influences in a range: 100-700 C.

Słowa kluczowe

EN

bentonite; montmorillonite; green sands; growth indicator; copper complex; compression strength

PL

bentonit; montmorillonit; syntetyczna masa formierska; wskaźnik wzrostu; kompleks miedzi; wytrzymałość na ściskanie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 3
• Strony: 139--142
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr.

Twórcy

autor

Żymankowska-Kumon S.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Krakow, Poland,

Bibliografia

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