Experimental studies of the processes of structure formation of composite mixtures with technogenic mechanoactivated silica component

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https://doi.org/10.58224/2618-7183-2023-6-2-5-18
 5-18 p.
The paper considers the issues of utilization of technogenic fibrous material – waste of basalt production. The chemical composition of the technogenic fibrous material was studied, it was found that it consists of 44% SiO2. The initial basalt rock, which undergoes changes during high-temperature processing in the process of obtaining basalt fiber, was studied using IR spectroscopy. The grinding of the crowns was carried out for 30 minutes, allowing to reach a specific surface area of 800 m2 / kg. Further grinding does not lead to an increase in the specific surface area, which is associated with the phenomenon of secondary aggregation of fine particles. Research on REM has shown that the “cold shots” before grinding are mostly rounded or oval in shape. The compositions were formed and the strength characteristics of the samples for the 3rd and 28th day were determined. The maximum strength gain of 59 MPa was established at the age of 28 days in samples with the addition of 5% ground “cold shots” . When introducing cold shots in an amount of 10% (composition 5) of the cement mass, an intensive strength gain is noted in the early stages of hardening (7 days) with a strength of 38 MPa, slightly higher than the strength of the control composition. The introduction of 15% ground “cold shots” gives a strength value slightly lower (32 MPa) than the values of the control composition (37 MPa) at all stages of hardening.
Keywords:
structure formation, composite mixtures, recycling, fiber concrete, cold shots
Klyuev A.V.
Candidate of Engineering Sciences (Ph.D.), Associate Professor, Belgorod State Technological University named after V.G. Shukhov, Russia
Kashapov N.F.
Doctor of Engineering Sciences (Advanced Doctor), Professor, Kazan (Volga Region) Federal University, Russia
Klyuev S.V.
Doctor of Engineering Sciences (Advanced Doctor), Associate Professor, Belgorod State Technological University named after V.G. Shukhov, Russia
Zolotareva S.V.
Postgraduate, Belgorod State Technological University named after V.G. Shukhov, Department of Theoretical Mechanics and Resistance of Materials, Russia
Shchekina N.A.
Postgraduate, Belgorod State Technological University named after V.G. Shukhov, Russia
Shorstova E.S.
Postgraduate, Belgorod State Technological University named after V.G. Shukhov, Russia
Lesovik R.V.
Doctor of Engineering Sciences(Advanced Doctor), Professor, Belgorod State Technological University named after V.G. Shukhov, Russia
Ayubov N.A.
Candidate of Economic Sciences (Ph.D.), Professor, Kh. Ibragimov Complex Research Institute of the Russian Academy of Sciences, Russia
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Klyuev A.V., Kashapov N.F., Klyuev S.V., Zolotareva S.V., Shchekina N.A., Shorstova E.S., Lesovik R.V., Ayubov N.A. Experimental studies of the processes of structure formation of composite mixtures with technogenic mechanoactivated silica component. Construction Materials and Products. 2023. 6 (2). P. 5 – 18. https://doi.org/10.58224/2618-7183-2023-6-2-5-18