The Chemico-Mineralogical Characteristics of Fly ash and its impact of Properties of PPC & resultant Concrete

The fly ash characteristics such as the combustible content, particle shape & size distribution of the fly ash and its Chemico-mineralogical characteristics i.e its oxide composition, nature & contents of the crystallites and the amorphous glassy phase have been observed to substantially influence the properties of the blended cement and concrete. These properties are dependent on coal characteristics and on the operating conditions of the coal fired thermal plants as also on the collection points of the fly ashes.

The enclosed paper discusses the effect of the compositional characteristics of the amorphous glassy phase & the nature of crystalline contents of the fly ash on its enhanced pozzolanic reactivity, the early and later age strength developments of the blended cement and the influence on the properties related to durability of the concrete such as resistance to reinforcement corrosion, resistance to sulphate attack and resistance to expansion due to ASR reaction.

A proper understanding of these interrelations of the fly ash & OPC characteristics is of immense importance for engineering the properties of the blended cement (PPC ) for durable Concrete.

12 thoughts on “The Chemico-Mineralogical Characteristics of Fly ash and its impact of Properties of PPC & resultant Concrete”

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