EVALUATION OF THE LUMP-FORMING CAPACITY OF CALCIUM CARBONATE WASTES WITHIN THE FRAMEWORK OF DEMONSTRATION OF F EASIBILITY OF TECHNOLOGY OF THEIR GRANULATION INTO ARTIFICIAL GRAVEL

• Main Authors: Chernykh Dmitry Ivanovich, Chernyshov Evgeniy Mikhaylovich, Oreshkin Dmitriy Vladimirovich
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2012-12-01
• Series: Vestnik MGSU
• Subjects: lump-forming; calcium carbonate; dispersibility; output of grains; capillary forces; moisture content
• Online Access: http://vestnikmgsu.ru/files/archive/issues/2012/11/ru/24.pdf

The objective of this research project is to substantiate the optimal values of disperse calcium carbonate waste materials, to ensure their granulation into artificial stone, and to substantiate the output rate efficiency. In the course of the research, the authors assessed the lump-forming rate demonstrated by calcium carbonate waste materials and cement grade CEM I 42,5 N on the basis of their molecular and capillary moisture capacity. The assessment methodology that defines the threshold of the lump-forming capacity, as well as the coefficient of output of man-made gravel for different dispersions of calcium carbonate waste materials have been identified. Data reliability is based on the mapping of the nature of dependences between the coefficient of lump-forming and the coefficient of gravel output on specific surface areas. The authors have identified that calcium carbonate waste materials have a lump-forming factor that is close or equal to 100%, if its dispersibility is equal to 400-600 m2/kg. In this case, the highest lump-forming rate is accompanied by the waste fineness of 500 m2/kg.