Alkali–silica reaction - Wikipedia
The alkali-silica reaction mechanism catalysed by a soluble strong base as NaOH or KOH in the presence of Ca(OH) 2 (alkalinity buffer present in the solid phase) can be compared with the …
Alkali-Silica Reaction: Causes and Solutions - Concrete Construction
2013年3月14日 · Alkali-silica reactivity, better known as ASR, has been with us since the early 1940s. To lessen ASR problems use low-alkali portland cement or incorporate pozzolans.
Alkali-silica reaction in concrete - Understanding Cement
Alkali-silica reaction (ASR) can cause serious expansion and cracking in concrete, resulting in major structural problems and sometimes necessitating demolition. This is a short introduction …
Alkali-Silica Reaction (ASR) in Concrete Explained
ACR (Alkali-Carbonate Reaction) is a reaction between alkalis in the concrete mortar and the chemical components of carbonate rocks like dolomitic limestones. The reaction causes …
Alkali–silica reaction: Current understanding of the reaction ...
2015年10月1日 · Alkali–silica reaction (ASR) is a major concrete durability problem, resulting in significant maintenance and reconstruction costs to concrete infrastructures all over the world.
Alkali Silica Reaction - an overview | ScienceDirect Topics
Alkali–silica reaction (ASR) is a chemical reaction that occurs between alkalis in PC and certain types of silica in aggregates. It causes the formation of expansive gels, which causes the …
dy identified a distinct sequence of chemical steps associated with the ASR process. These steps are marked as I to IV in figure 1: (I) the formation of calcium silica hydrate (C-S-H), (II) the …
A Practical Approach to ASR Mitigation in Existing Structures
The alkali–silica reaction (ASR) occurs over time in concrete between the alkaline cement paste and reactive non-crystalline (amorphous) silica, which is found in many common aggregates. …
Causes of ASR in Concrete: Key Factors Explained
Alkali-Silica Reaction (ASR) in concrete is a chemical process that compromises the integrity and longevity of concrete structures. This reaction occurs between the alkalis present in cement …
Alkali Silica Reaction - an overview | ScienceDirect Topics
Briefly, alkali-silica reaction is a reaction between the alkali hydroxides in the pore solution of concrete and thermodynamically unstable silica in certain aggregates. The reaction product is …
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