Ternary blended cement with limestone filler and kaolinitic calcined clay.

ALEJANDRA TIRONI; ALBERTO NESTOR SCIAN; EDGARDO FABIÁN IRASSAR

RILEM Bookseries

Springer Science + Business Media

Lugar: Nueva York; Año: 2015 vol. 10 p. 195 - 201

2211-0844

The use of calcined clays providing from low grade kaolinitic clayscombined with the limestone filler in ternary blended cement formulation hasreceived considerable attention in recent years. This paper describes theresults of a research project to study the behavior of kaolinitic calcined clays(CC) in combination with limestone filler (F). Blended cements were obtainingreplacing CC (0 to 30%) and F (0 to 10 %) by mass by Portland cement (PC). Thepozzolanicity of blended cement was assessed by the Frattini tests at 2, 7 and28 days. The response of the system was evaluated in terms of flow, and thecompressive strength at 2, 7 and 28 days. The hydration progress was determinedby the type and amount of hydration compounds at 2, 7 and 28 days using theRietveld method. The change in pore size distribution was determined by mercuryintrusion porosimetry (MIP). Hydrated phases obtained correspond to thepozzolanic reaction (contribution CC) and phase stabilization (contribution F)modifying the pore structure and all factors contribute to develop acceptablemechanical properties with a large reduction of energy consumption and CO2emission.