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TECHNOLOGY OF CONSTRUCTION PROCEDURES. MECHANISMS AND EQUIPMENT

Composition and structure of the stone composite gypsumbinder with additives of lime and the ground haydite dust

Vestnik MGSU 12/2013
  • Khaliullin Marat Il'surovich - Kazan State University of Architecture and Engineering (KGASU) Candidate of Technical Sciences, Associate Professor, Director, Department is Scientific and Research Activity, Kazan State University of Architecture and Engineering (KGASU), 1 Zelenaya St., Kazan, 420043, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Rakhimov Ravil' Zufarovich - Kazan State University of Architecture and Engineering (KGASU) Doctor of Technical Sciences, Professor, Corresponding Member, Kazan State University of Architecture and Engineering (KGASU), 1 Zelenaya St., Kazan, 420043, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Gaifullin Al'bert Rinatovich - Kazan State University of Architecture and Engineering (KGASU) Candidate of Technical Sciences, Assistant, Department of Building Materials, Kazan State University of Architecture and Engineering (KGASU), 1 Zelenaya St., Kazan, 420043, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 109-117

In the last decades in a number of countries burned clays have been used as a pozzolanic additives to the concrete, which is connected with their universal distribution and cost savings due to reduction of long-distance transportation of the additives. The haydite dust is the co-product of the haydite gravel. At every enterprise of haydite gravel about 7-8 tons of haydite dust are daily formed. The haydite dust represents thermally activated clay. Its structure includes a certain amount of non-dehydrated clay and dehydrated clay minerals with crystal lattices of different levels of defects. Previously the authors described the compositions of cost-effective composite gypsum binding materials produced with complex mineral additive, including lime, a ground haudite dust and the superplasticizer possessing the durability at compression up to 27 MPa and coefficient of softening up to 0,78. In this paper the authors investigated the composition and structure of artificial stone on the basis of the developed composite gypsum binder. As a basic binder building plaster is used. In the research work the X-ray phase analysis, the differential thermal analysis, electron microscopy and the standard methods of research of concrete porosity were used. The introduction in composition of gypsum binder with a complex mineral additive allows to receive an artificial stone with more dense and finegrained structure, durability and water resistance in comparison with original binder without any additive. The content of ettringite in the course of hardening does not increase. The formation of low based low-main hydrosilicates of the calcium filling steam structure of a gypsum stone, forming additional contacts between the gypsum crystals, raising stone water resistance is established.

DOI: 10.22227/1997-0935.2013.12.109-117

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