Silicate species of water glass and insights for alkali-activated green cement

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4923371· OSTI ID:22493924

Jansson, Helén ^[1]; Bernin, Diana ^[2]; Ramser, Kerstin ^[3]

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1. Department of Civil and Environmental Engineering, Chalmers University of Technology, SE-41296 Gothenburg (Sweden)
2. Swedish NMR Centre, Gothenburg University, Gothenburg, 41390 Sweden (Sweden)
3. Department of Engineering Sciences and Mathematics, Luleå University of Technology, 971 87 Luleå (Sweden)

Despite that sodium silicate solutions of high pH are commonly used in industrial applications, most investigations are focused on low to medium values of pH. Therefore we have investigated such solutions in a broad modulus range and up to high pH values (∼14) by use of infrared (IR) spectroscopy and silicon nuclear magnetic resonance ({sup 29}Si-NMR). The results show that the modulus dependent pH value leads to more or less charged species, which affects the configurations of the silicate units. This in turn, influences the alkali-activation process of low CO{sub 2} footprint cements, i.e. materials based on industrial waste or by-products.

• OSTI ID: 22493924
• Journal Information: AIP Advances, Vol. 5, Issue 6; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
BY-PRODUCTS
CARBON DIOXIDE
CEMENTS
GLASS
INDUSTRIAL WASTES
INFRARED SPECTRA
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
PH VALUE
SILICON
SILICON 29
SODIUM SILICATES
SOLUTIONS
WATER