skip to main content

SciTech ConnectSciTech Connect

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

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.
Authors:
 [1] ;  [2] ;  [3]
  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)
Publication Date:
OSTI Identifier:
22493924
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 6; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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