Assertion: calcium hydroxide | /r/HasProperty | portlandite
Facets:
Source sentences:
text: the so-produced soluble alkali silicagel can then react with calcium hydroxide (portlandite) to precipitate insoluble calcium silicate hydrates (C-S-H phases) and regenerate NaOH for continuing the initial silica dissolution reaction:
text: In chemical terms, the pozzolanic reaction occurs between calcium hydroxide, also known as portlandite (Ca(OH) 2 ), and silicic acid (written as H 4 SiO 4 or as Si(OH)
text: divalent cations released by calcium hydroxide (portlandite) when the pH starts to slightly drop may influence the gelation process.
text: Its viscosity increases due to gelation process and its mobility (fluidity) strongly decreases when C-S-H phases start to precipitate after reaction with calcium hydroxide (portlandite).
text: Calcium chloride then reacts with calcium hydroxide (portlandite) present in cement hydration products and forms a deleterious expanding phase also named CAOXY (abbreviation for calcium oxychloride) by concrete technologists.
text: At ambient temperature, calcium hydroxide (portlandite) dissolves in pure water to produce an alkaline solution with a pH of about 12.4.
text: Cation exchange with calcium hydroxide (portlandite) and precipitation of amorphous calcium silicate hydrates (C-S-H) accompanied by NaOH regeneration: