| Role of Alumina, Magnesia and Manganese Oxides on the
Hydration and Hardening of Slag Glasses |
c. A. TANEJA
Pages : 109-124
DOI : 10.1080/0371750X.1973.10840573 |
| Abstract |
| The effect of increasing amounts of each of Al20 3, MgO and MnO in synthetic slag glasses
corresponding to Indian slag compositions, on their hydraulic behaviour after activation with
cement clinker has been studied. Results showed lowering of strength of cements at all ages
with increase in Al20 3 content in glasses beyond 22 percent in spite of the progressive increase
in chemically combined water. Presence of MgO up to 2.5 percent improved the strength
but a higher content was found to be detrimental. High MgO in glass did not cause unsoundness
in cement. MnO up to 2.5 percent was beneficial but a higher content affected the early
strength adversely.
The hydration products ident(fied were mainly calcium silicate hydrate and tetracalcium
aluminate hydrate. Magnesium or manganese containing hydration products could not be
identified. These ions appear to go into solid solution in the hydration phases. The study
explained the pattern of strength development in Indian granulated slags.
Introduction |
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