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Valorization of waste sulfur in synthesis of eco-friendly self-compacting concrete

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2018
Authors
Savić, Aleksandar R.
Martinović, Sanja
Vlahović, Milica
Stević, Zoran
Volkov-Husović, Tatjana
Conference object (Published version)
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Abstract
Self-compacting concrete (SCC) typically contains a certain content of very fine mineral fillers such as limestone powder. The idea of this study was to partially replace limestone with elemental waste sulfur since it is hydrophobic, insoluble in water and therefore chemically inert in concrete mixtures. Properties of conventional SCC with limestone and several compositions with different sulfur content were compared. Hardened concrete was tested for compressive, flexural and adhesion strengths, dynamic elasticity modulus, specific electrical resistance, density, microstructure and infrared thermography. Results showed slight decline in compressive, flexural and adhesion strengths as well as in dynamic elasticity modulus. Specific electrical resistance and density were higher for samples with sulfur. SEM analysis indicated slight porosity increase for the sample with sulfur. Infrared thermography was applied as a fast method for detecting internal deformations. Having in mind that all ...properties should remain or improve in case of waste valorization and the criteria should set to satisfy requirements for SCC, this study proved that all mixtures can be used for certain structural applications.

Keywords:
self-compacting concrete (SCC) / waste sulfur / physical properties / mechanical properties / microstructure / infrared thermography
Source:
PROCEEDINGS 6th International Conference on Renewable Electrical Power Sources, 2018
Projects:
  • Implementation of new technical, technological and environmental solutions in the mining and metallurgical operations RBB and RBM (RS-33007)
  • Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)
  • Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-45012)
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URI
http://grafar.grf.bg.ac.rs/handle/123456789/2004
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  • Radovi istraživača / Researcher's publications
  • Катедра за материјале и конструкције
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