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Showing 1 to 5 of 5 for “"alkali silicate"”.
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Internal friction of mixed-alkali silicate glasses
"The mixed alkali effect in silicate glasses was examined from internal friction measurements made over the temperature range from -190 to 500⁰C and at a frequency of 0.4 Hz. Supplemental measurements of the activation energy for the different internal friction peaks, dynamic shear modulus, …
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The Influence of Amorphous, Sub-Micrometer Silica Particles in Cement Pastes and Mortars with Very Low Water-to-Cement Ratios (Ultra-High Performance Concrete)
… and subsequent pozzolanic reaction to calcium–silicate–hydrate phases (C–S–H phases) and/or due to a heterogeneous nucleation of C–S–H phases from alite hydration on silica surfaces (seeding effect). Herein, the influence of the reactivity of silica has been rarely considered. Furthermore, the …
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Electron spectroscopic characterization of corrosion reactions of active metal systems.
… investigated. Li was deposited on SiO₂, sodium silicate, potassium silicate, and B₂O₃ glasses in an ultra-high vacuum deposition and analysis chamber. The reaction of Li with SiO₂ results in substantial reduction of the glass matrix to form a thin product layer. A negatively-charged Si species …
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Assessment of alkali aggregate reaction avoidance measures and alkali aggregate reaction tests worldwide
Alkali Aggregate Reaction (AAR) is a deterioration mechanism which affects concrete structures all over the world. Different parts of the world employ various mitigation and control measures for AAR damage. Different tests are also performed worldwide to assess AAR. With the variety of AAR …
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Druck- und Temperaturbedingungen für sekundäre Schmelzbildungen im Rahmen alkalisilikatischer und karbonatitischer Intrusionen
… are frequent constituents of carbonatite and alkaline silicate complexes. Their genesis were since then controversially discussed. Compositional and morphological characteristics of fenite aureoles lead to the assumption that nephelin syenites or ijolithes may be formed from the palingenesis …