• Kolářová, K.
• Kromka, A.
• Tesárek, P.
• Prošek, Z.
• Čermák, J.
• Remeš, Z.
• Babčenko, O.
• Beranová, K.

Abstract

<jats:title>Abstract</jats:title><jats:p>Waste glasses based on silicon dioxide (silica) belong to one of the most demanded secondary raw materials. Besides the glass industry, with strict requirements for source materials, silica-based granular materials from waste glasses are considered suitable for use as fillers in alkali-activated cement-based composites. However, due to variations of ground waste glass powder composition and properties a comprehensive characterization is often needed. This study investigated commercially available silica-based powders by scanning electron microscopy, X-ray photoelectron spectroscopy, attenuated total reflectance Fourier transform infrared spectroscopy and Fourier transform infrared Raman spectroscopy, zeta-potential and pH measurements, etc. The differences found in the non-silica impurities composition and structure of SiO<jats:sub>2</jats:sub> particles (amorphous vs crystalline) were considered as determinative factors that will affect particles’ interaction with water and cement binder. The observed results provide a fundamental background and will contribute to a better understanding and explanation of the silica-based secondary raw materials interaction reactions in concrete or mortar.</jats:p>

Topics

• impedance spectroscopy
• amorphous
• scanning electron microscopy
• x-ray photoelectron spectroscopy
• glass
• glass
• composite
• cement
• Silicon
• Raman spectroscopy
• Fourier transform infrared spectroscopy
• pH measurement