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- Pozzolanic_reaction abstract "The pozzolanic reaction is the chemical reaction that occurs in portland cement containing pozzolans. It is the main reaction involved in the Roman concrete invented in Ancient Rome and used to build, for example, the Pantheon.At the basis of the pozzolanic reaction stands a simple acid-base reaction between calcium hydroxide, also known as Portlandite, or (Ca(OH)2), and silicic acid (H4SiO4, or Si(OH)4), and . Simply, this reaction can be schematically represented as follows:Ca(OH)2 + H4SiO4 → Ca2+ + H2SiO42- + 2 H2O → CaH2SiO4 · 2 H2Oor summarized in abbreviated notation of cement chemists:CH + SH → C-S-HThe product of general formula (CaH2SiO4 · 2 H2O ) formed is a calcium silicate hydrate, also abbreviated as C-S-H in cement chemist notation, the hyphenation denotes the variable stoichiometry. The ratio Ca/Si, or C/S, and the number of water molecules can vary and the above mentioned stoichiometry may differ.Many pozzolans contain aluminate, or Al(OH)4-, that will react with calcium hydroxide and water to form calcium aluminate hydrates such as C4AH13, C3AH6 or hydrogarnet, or in combination with silica C2ASH8 or strätlingite (cement chemist notation). In the presence of anionic groups such as sulphate, carbonate or chlorine, AFm phases and AFt or ettringite phases can form.".
- Pozzolanic_reaction wikiPageExternalLink 3383178a708024fc4d80b7e98f28c61f.
- Pozzolanic_reaction wikiPageID "16877627".
- Pozzolanic_reaction wikiPageRevisionID "601841877".
- Pozzolanic_reaction hasPhotoCollection Pozzolanic_reaction.
- Pozzolanic_reaction subject Category:Cement.
- Pozzolanic_reaction subject Category:Chemical_reactions.
- Pozzolanic_reaction subject Category:Concrete.
- Pozzolanic_reaction subject Category:Masonry.
- Pozzolanic_reaction type ChemicalProcess113446390.
- Pozzolanic_reaction type ChemicalReaction113447361.
- Pozzolanic_reaction type ChemicalReactions.
- Pozzolanic_reaction type NaturalProcess113518963.
- Pozzolanic_reaction type PhysicalEntity100001930.
- Pozzolanic_reaction type Process100029677.
- Pozzolanic_reaction comment "The pozzolanic reaction is the chemical reaction that occurs in portland cement containing pozzolans. It is the main reaction involved in the Roman concrete invented in Ancient Rome and used to build, for example, the Pantheon.At the basis of the pozzolanic reaction stands a simple acid-base reaction between calcium hydroxide, also known as Portlandite, or (Ca(OH)2), and silicic acid (H4SiO4, or Si(OH)4), and .".
- Pozzolanic_reaction label "Comportamento pozzolanico".
- Pozzolanic_reaction label "Pozzolanic reaction".
- Pozzolanic_reaction label "Puzzolanische Reaktion".
- Pozzolanic_reaction sameAs Puzzolanische_Reaktion.
- Pozzolanic_reaction sameAs Comportamento_pozzolanico.
- Pozzolanic_reaction sameAs m.0409862.
- Pozzolanic_reaction sameAs Q6000723.
- Pozzolanic_reaction sameAs Q6000723.
- Pozzolanic_reaction sameAs Pozzolanic_reaction.
- Pozzolanic_reaction wasDerivedFrom Pozzolanic_reaction?oldid=601841877.
- Pozzolanic_reaction isPrimaryTopicOf Pozzolanic_reaction.