Mechanical and Electromagnetic Properties of Self-Compacted Geopolymer Concretes With Nano Silica and Steel Fiber Additives

• Published in: IEEE transactions on instrumentation and measurement Vol. 71; pp. 1 - 8
• Main Authors: Hasar, Ugur Cem, Eren, Necip Altay, Ozturk, Hamdullah, Izginli, Mucahit, Korkmaz, Huseyin, Cevik, Abdulkadir, Nis, Anil, Irshidat, Mohammad R.
• Format: Journal Article
• Language: English
• Published: New York IEEE 2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Additives; Aspect ratio; Compressive strength; Concrete; Electromagnetic properties; Electromagnetics; Frequencies; Frequency measurement; geopolymer; Geopolymers; Iron; Mechanical factors; mechanical properties; Mechanical tests; Modulus of elasticity; nanosilica (NS); self-compact; Slag; steel fiber (SF); Steel fibers
• ISSN: 0018-9456; 1557-9662
• DOI: 10.1109/TIM.2022.3173272

Mechanical and electromagnetic properties (over 2-16 GHz) of self-compacted geopolymer concrete (SCGC) samples with different amounts of nanosilica (NS) and steel-fiber (SF) have been examined. From the mechanical tests, it is observed that, while the amount of NS added to SCGC samples does not make any noticeable change in compressive strength and modulus of elasticity values, an increase in the amount and/or aspect ratio of SF additives improves these values. From the electromagnetic tests, it is noted that the effect of SF on the reflection properties of SCGC samples is relatively smaller than the effect of NS. Besides, while the incorporation of NS improves the resonance characteristics of transmission properties, additives of SF decrease these properties over the entire frequency band. Finally, sample C7, which has 1% SF with a smaller diameter and 2% NS in reference to the mass of the binder, has the optimum NS and SF additives, producing maximum absorbance values.