Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The mechanism of alkali-aggregate reaction in concrete/mortar and its mitigation by using geopolymer materials and mineral admixtures: a comprehensive review
Concrete is an indispensable material in the construction industry; however, it is susceptible to many damaging mechanisms such as Alkali Aggregate Reaction (AAR). AAR initiates when alkali hydroxide in cement reacts with aggregates (fine/coarse) containing a bulk amount of silica or carbonate thereby triggering an Alkali-Silica Reaction (ASR) or Alkali Carbonate Reaction (ACR) respectively. AAR has very adverse effects on different properties of concrete including durability, stiffness, impermeability, strength, and aesthetics. AAR causes severe expansion and cracking in concrete. Although several methods can be used to mitigate AAR, the most suitable method for controlling AAR and enhancing concrete properties is the incorporation of geopolymer materials and mineral admixtures in concrete. This paper provides a comprehensive review on the mechanism, causes of AAR, and the behavior/performance of different geopolymers (a combination of an alkaline liquid with fly ash, metakaolin, and blast furnace slag) and mineral admixtures (fly ash, highly reactive metakaolin, rice husk ash, waste glass powder, ground granulated blast furnace slag, silica fume, and trass) when used to eliminate AAR and their effect on different mechanical properties of concrete. The discussion concludes that geopolymers and mineral admixtures work efficiently in the mitigation of AAR if they are used in an appropriate percentage; they not only reduce/mitigate AAR but also significantly increase the mechanical properties of concrete.
The mechanism of alkali-aggregate reaction in concrete/mortar and its mitigation by using geopolymer materials and mineral admixtures: a comprehensive review
Concrete is an indispensable material in the construction industry; however, it is susceptible to many damaging mechanisms such as Alkali Aggregate Reaction (AAR). AAR initiates when alkali hydroxide in cement reacts with aggregates (fine/coarse) containing a bulk amount of silica or carbonate thereby triggering an Alkali-Silica Reaction (ASR) or Alkali Carbonate Reaction (ACR) respectively. AAR has very adverse effects on different properties of concrete including durability, stiffness, impermeability, strength, and aesthetics. AAR causes severe expansion and cracking in concrete. Although several methods can be used to mitigate AAR, the most suitable method for controlling AAR and enhancing concrete properties is the incorporation of geopolymer materials and mineral admixtures in concrete. This paper provides a comprehensive review on the mechanism, causes of AAR, and the behavior/performance of different geopolymers (a combination of an alkaline liquid with fly ash, metakaolin, and blast furnace slag) and mineral admixtures (fly ash, highly reactive metakaolin, rice husk ash, waste glass powder, ground granulated blast furnace slag, silica fume, and trass) when used to eliminate AAR and their effect on different mechanical properties of concrete. The discussion concludes that geopolymers and mineral admixtures work efficiently in the mitigation of AAR if they are used in an appropriate percentage; they not only reduce/mitigate AAR but also significantly increase the mechanical properties of concrete.
The mechanism of alkali-aggregate reaction in concrete/mortar and its mitigation by using geopolymer materials and mineral admixtures: a comprehensive review
Salim, Muhammad Usama (Autor:in) / Mosaberpanah, Mohammad Ali (Autor:in)
European Journal of Environmental and Civil Engineering ; 26 ; 6766-6806
09.11.2022
41 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Influence of Mineral Admixtures on the Alkali-Aggregate Reaction
| British Library Online Contents | 1997
Influence of Mineral Admixtures on the Alkali-Aggregate Reaction
| Online Contents | 1997
Mechanism of Using Mineral Admixtures in Concrete to Suppress Alkali-Silica Reaction
| British Library Online Contents | 2006
Mechanism of Using Mineral Admixtures in Concrete to Suppress Alkali-Silica Reaction
| British Library Conference Proceedings | 2006
Engineering Index Backfile | 1958