-
Portlandite is a hydroxide-bearing
mineral typically included in the
oxide mineral class. It is the
naturally occurring form of
calcium hydroxide (Ca(OH)2)...
-
Dissolved 1784; 240 years ago (1784) Preceded by
Pittites Merged into
Portlandites Headquarters Northamptonshire Ideology Conservatism Parliamentarism Political position...
-
constants pKa and pKb Petch, H. E. (1961). "The
hydrogen positions in
portlandite, Ca(OH)2, as
indicated by the
electron distribution". Acta Crystallographica...
-
ultimate reaction with
portlandite,
because they are
continuously regenerated from the
cation exchange reaction with
portlandite. As a consequence, they...
- of
Portland cement and
takes part in the
pozzolanic reaction with the
portlandite formed in the
hydration of the main
cement minerals (e.g. alite). Metakaolin...
- the Na2Oeq
content of cement) also
contributes to the
carbonation of
portlandite by
atmospheric CO2 in
concrete although the rate of
propagation of the...
-
chemical environment provided by the
alkali reserve (KOH, NaOH) and the
portlandite (calcium hydroxide)
contained in the
hardened cement paste causes a p****ivating...
- also, 2 OH− → O2− + H2O For
portlandite this
gives thus the
following m**** balance: Ca(OH)2 → CaO + H2O Thus
portlandite can be
written as CaO · H2O or...
-
produce several other compounds. Thus,
these limes contain inclusions of
portlandite, brucite, magnesite, and
other magnesium hydroxycarbonate compounds....
-
cement its strength.
Carbon dioxide is
slowly absorbed to
convert the
portlandite (Ca(OH)2) into
insoluble calcium carbonate.
After the
initial setting...
