Strength of Fine Concrete with Addition of Fine Crushed Recyclable Optical Discs

The possibility of utilization of optical disks after their fine crushing for partial replacement of filler in fine concrete is analyzed. The dependence of the compressive strength of concrete on three factors was studied: the amount of waste of fine crushed optical discs in fractions of the mass of the filler; the amount of plasticizer and water-cement ratio. In the experiment, the utilized optical disks were crushed to fractions of 0.315–2.5 mm. It is established that the use of crushed optical discs waste in fine concrete to partially replace construction sand in an amount from 0 to 50% of the total mass of fine filler reduces the compressive strength of concrete samples by 29%. The change in the values of other factors has approximately the same effect on the strength of the samples, but much less than the proportion of waste in the mixture: with an increase in the amount of plasticizer in the mixture, the compressive strength almost linearly increases by 7.5%, with an increase in the water-cement ratio – decreases by 6.3%. The decrease in bending strength and density with an increase in the proportion of waste of crushed discs in the filler is also established. The introduction of crushed optical discs up to 25% by weight of the filler in the mixture composition makes it possible to obtain, at certain ratios of the amount of plasticizer and water-cement ratio, samples with a compressive strength close to the strength of the samples without waste. At that a reduction in the consumption of the binder up to 20% is achieved.

V.A. EZERSKIY¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
N.V. KUZNETSOVA², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.D. SELEZNEV², Master Student (This email address is being protected from spambots. You need JavaScript enabled to view it.)
G.A. MOISEENKO³, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Bialystok University of Technology (45A, Wiejska Street, Bialystok, 15-351, Poland)
² Tambov State Technical University (106, Sovetskaya Street, Tambov, 392000, Russian Federation)
³ Research Institute of Building Physics of RAACS (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

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