Physicochemical properties of lithium–admixed synthetic alkali–silica reaction (ASR) gels

Synthetic ASR gels produced via a new sol–gel method incorporating silicon, calcium, sodium, potassium and lithium with a broad range of compositions were synthesized using sol–gel method. The rheological and chemical properties of the gels were characterized as a function of gel composition. The primary objective of this research was to find out which chemical components affect the gelation, alkalinity, yield stress and osmotic pressure of the gels, which are argued to be the governing factors affecting the deleterious behavior of ASR gels in concrete. The results suggest that calcium is the predominant factor promoting the gelation and yield stress of the gels while sodium and potassium have opposite effects. Moreover, the presence of lithium was found to soften the structure of the gels and reduce the hydroxide concentration in the gels by up to a factor of seven for highly alkaline gels, which partly explains the suppressing effect of this element on ASR in concrete.

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Work Title Physicochemical properties of lithium–admixed synthetic alkali–silica reaction (ASR) gels
Access
Open Access
Creators
  1. Asghar Gholizadeh–Vayghan
  2. Farshad Rajabipour
Keyword
  1. Alkali-silica reaction
  2. Osmotic pressure
  3. Sol-gel
  4. Synthetic ASR gel
  5. Yield stress
License In Copyright (Rights Reserved)
Work Type Conference Proceeding
Publisher
  1. Proc. of the 16th International Conference on Concrete Alkali Aggregate Reactions (ICAAR)
Publication Date June 1, 2022
Source
  1. 16th International Conference on Alkali Aggregate Reaction in Concrete, Lisboa, Portugal, 16-18 June 2020
Deposited July 12, 2023

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Version 1
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  • Created
  • Added Gholizadeh_and_Rajabipour.docx
  • Added Creator Asghar Gholizadeh
  • Added Creator Farshad Rajabipour
  • Published
  • Updated Source, Keyword, Subtitle, and 1 more Show Changes
    Source
    • 16th International Conference on Alkali Aggregate Reaction in Concrete, Lisboa, Portugal, 16-18 June 2020
    Keyword
    • Alkali-silica reaction, Osmotic pressure, Sol-gel, Synthetic ASR gel, Yield stress
    Subtitle
    • Proc. of the 16th International Conference on Concrete Alkali Aggregate Reactions (ICAAR)
    Publisher
    • Proc. of the 16th International Conference on Concrete Alkali Aggregate Reactions (ICAAR)
  • Renamed Creator Asghar Gholizadeh–Vayghan Show Changes
    • Asghar Gholizadeh
    • Asghar Gholizadeh–Vayghan
  • Updated