| مستخلص: |
A method has been developed for producing concrete with the addition of solid industrial waste – ash residues, metallurgical slag and microsilica. The results of studying the influence of waste content on the properties of cement and concrete based on it are presented. It has been established that with an increase in the addition of ash residues from 10 to 20%, the strength of concrete increases and reaches 60 MPa, in addition, the strength of concrete is affected by the concentration of the binder-alkaline solution, temperature, curing time, etc. Blast furnace slag, a waste product from the Azertechnoline steel mill, was added to amount of 10-50% wt. It has been established that slag cement is characterized by high activity when it contains up to 20% blast furnace slag and reaches a strength value of 47-48 MPa. It should be noted that the temperature factor affects the process of strength gain of these composite cements. A study of the influence of the addition of microsilica, a waste product from the production of ferroalloys from the Sumgayit plant, on the strength of concrete showed that the introduction of a microsilica additive in an amount of 10% increases the compressive and bending strength by 50% and 16%, respectively. Further increasing the amount of silica fume to 20% leads to the maximum increase in strength (72% and 18%, respectively, in compression and bending). An increase in microsilica content to 30-40% is accompanied by a decrease in the strength of concrete. [ABSTRACT FROM AUTHOR] |