Abstract
This study was carried out to investigate the effects of carbon powder on the electrical conductivity and mechanical properties of fly ash reinforced mortars used as mineral additives. Samples were created by replacing CEM I 42.5 R cement, water and Cen standard sand with 0.5%, 1%, 3% carbon powder by weight. Class F and Class C fly ash were added separately at the rate of 10% and 20% by weight of cement to the formed carbon dust series. 20 different series were created with the reference sample. Electrical resistivity measurements were made to the oven dry and natural humid conditions of the samples that completed their 7,28 and 56 days curing period. The physical properties of the samples were determined and bending and compressive strength tests were made. The results obtained were evaluated and it was observed that with the increase of the carbon dust ratio compared to the reference sample, the electrical conductivity ratio increased, but the conductivity decreased depending on the time. It has been observed that the F class fly ash combination series are more conductive than the C class combination series. It was observed that the compressive and tensile strength values of F and C class fly ash carbon dust free samples increased with time. Carbon dust has been shown to increase compressive strength in fly ashless series. There was an increase in the 56th day reading in the tensile strength. It was observed that F class increased tensile and compressive strength in fly ash and carbon dust combination series. Keywords: Carbon dust, F class fly ash, C class fly ash, Electrical conductivity. DOI: 10.7176/CER/13-2-02 Publication date: April 30 th 2021
Highlights
Human beings have constantly developed the types of materials and application methods that they use in structures
An increase in compressive strength was observed in a Class C fly ash sample with a rate of 20% without carbon powder compared to the reference sample
An increase in compressive strength was observed in all series with 10% F class with fly ash carbon powder and carbon powder-free compared to the control sample (Table 3.7)
Summary
Human beings have constantly developed the types of materials and application methods that they use in structures. Activated carbon is used in a wide range of areas, including in the industry, purification and refinement of gases, in separation of mixtures, in purification processes in the food industry, in water and wastewater treatment, in carbon additive in the metal industry, in protective clothing in the defence industry, in explosives in the weapon industry and making bombs to silence electronic systems and in the health sector It is strategically important for the future of our country, as it has quite suitable areas of use for the defence industry. According to the results obtained, it was observed that electrical conductivity properties improved when steelmaking slag and carbon fibre were used together in mortar samples. Cement CEM I 42.5 R Portland cement which is compatible with TS EN 197-1 , with grain density 3.15 g/cm and whose specific surface is 3740 cm2/g was used in the study
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