Abstract
The replacing part of Portland cement with thermally activated clays will reduce the "clinker factor", which in turn will reduce greenhouse gas (CO2) emissions. The metakaolin activity by the lime absorption method from a saturated lime solution and by binding Cao from limestone dough was determined. It is shown that the metakaolin interaction products with Ca (OH)2 are characterized by a multiphase and are composed mainly of hexagonal and cubic hydroalumination calcium and various basicity poorly crystallized calcium hydro-silicates. The results obtained allow the Metakaolin to be considered a new, hydraulically active pozzolanic additive.
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