Title: Silica concrete compressive behavior under alternating magnetic field // Magazine of Civil Engineering. – 2021. – № 1 (101). — С. 10112
Creators: Safari T. A.; Rezaifar O.; Gholhaki M.
Imprint: 2021
Collection: Общая коллекция
Subjects: Строительство; Строительные материалы и изделия; silicate concrete; magnetic fields; concrete compression; quartz sand; greenhouse gas; carbon dioxide emissions; силикатные бетоны; магнитные поля; сжатие бетонов; кварцевый песок; парниковые газы; выбросы двуокиси углерода
UDC: 691
LBC: 38.3
Document type: Article, report
File type: PDF
Language: English
DOI: 10.34910/MCE.101.12
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)
Record key: RU\SPSTU\edoc\67074

Allowed Actions: Read Download (1.0 Mb)

Group: Anonymous

Network: Internet


Due to the importance of inventing new techniques capable of enhancing concrete structural properties while reducing environmental issues associated with CO{2] emissions in concrete industry, which preoccupies environmental scientists, a novel investigation was performed on feasibility of benefitting from Alternating Magnetic Field (AMF) and silica particles to attain this goal. Hence, some experiments were conducted on cylindrical concrete specimens comprising different silica sand contents of up to 10 %, wherein the influence of exposing fresh and hardened concrete to AMF of frequency 50 Hz and density 0.5 Tesla (T) on compressive strength of 7 and 28-day specimens was evaluated. For this, a specialized test setup was assembled such that the specimen could be subjected to compressive force and AMF, simultaneously. It was found that AMF can improve concrete compressive strength, where this technique is more efficient as to exposing hardened concrete. What was significant about the results was the fact that adding silica sand not only improved concrete mechanical strength but also considerably enhanced the effectiveness of AMF in increasing concrete compressive strength, when applied to hardened concrete. For instance, replacing 10 % of cement content with silica sand increased compressive strength of 28-day specimens by 8.4, but adding 10 % silica sand along with exposing specimens to AMF yielded an increase of nearly 21 % in real-time. Thus, developing this method can result in a new generation of smart constructions. Moreover, by adding 10 % silica sand, the emission of carbon dioxide, a greenhouse gas, reduces by 10 percent while significantly enhancing compressive strength.

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Table of Contents

  • Silica concrete compressive behavior under alternating magnetic field
    • 1. Introduction
    • 2. Methods
      • 2.1. Test program
      • 2.2. Material Properties
      • 2.3. Magnetic circuit
      • 2.4. Specimen preparation
      • 2.5. Test procedure
    • 3. Results and Discussion
      • 2.6. The effect of adding silica sand
      • 2.7. The effect of AMF
      • 2.8. Advantages of this techniques
      • 2.1.1. Environmental advantages
      • 2.1.2. Advantages of post-magnetization: theoretical discussion
    • 4. Conclusion
    • 5. Acknowledgements

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