Study The Role of mineral additives on grind ability and quality of cement clinker

Document Type : p

Authors

1 Professor of mining engineering, Department of mining, Urmia University

2 Graduate of MSC mining engineering, Urmia University

3 Ph.D. Student of mineral processing, Kashan University

Abstract

Aim of this paper is studying the effect of mineral addictive and type of them, on the processing of cement produce and quality of it. For this purpose, preparation of samples of cement clinker with additives of pozzolan, perlite, pumice and also abrasive organic compounds have been investigated their grinding efficiency. Then, concrete blocks with dimensions of 10 × 10 cm were constructed, than tested compressive strength at different ages of 2, 3, 7 and 28 days. Based on the results, the use of mineral additives has led to an increase in the number of Blaine, in other words, additives have played the role of abrasive aid. The mixing plan of 85% of clinker and 15% of pozzolan resulted in the highest amount of blast cement (4546 m2/kg). The use of additives at the age of 2 and 3 days of concrete has reduced the compressive strength. At the age of 28 days, the presence of additives increases its compressive strength compared to the non-use of the additive. The combination of organic abrasives and mineral additives in all cases has led to an increase in concrete bulk and compressive strength. The combination of 15% by weight of pozzolan, 85% clinker, 4% gypsum and 3 g of abrasive organic compound, is the optimum combination of cement.

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