Marta Palacios

Spanish National Research Council | CSIC · Materials Department

The impact of NaSCN and Na 2 S 2 O 3 on the reactivity, microstructure and morphology of C 3 S and model cement (with a clinker containing 85% C 3 S and 15% C 3 A) pastes was systematically investigated. Results concluded that both alkali salts mainly act enhancing the reactivity of the C 3 S phase while not significant influence on the reactivity...

The impact of NaSCN and Na2S2O3 on the reactivity, microstructure and morphology of C3S and model cement (with a clinker containing 85% C3S and 15% C3A) pastes was systematically investigated. Results concluded that both alkali salts mainly act enhancing the reactivity of the C3S phase while not significant influence on the reactivity of C3A was me...

At first, a critical overview of current polycarboxylate (PCE) technology including the chemistry of different kinds of PCEs, characteristic molecular properties, their interaction with cement and application aspects are discussed. In the following, the classification and chemistry of clays and clay minerals is presented. In addition, the interacti...

The partial substitution of clinker by supplementary cementitious materials (SCMs) is a common strategy to reduce the environmental impact of concrete, but also to increase its durability and long-term mechanical properties. However, the slow reactivity of SCMs can compromise the early strength of concrete containing blended cements. Several studie...

Partial replacement of clinker Portland cement by supplementary cementitious materials (SCMs) is the most effective strategies to reduce the embodied energy and CO2 footprint of Portland cement and concrete. However, this leads to the decrease of the early mechanical properties of concrete. Reaction kinetics and mechanical strength of pure and ble...

This research aims at gaining a further understanding of the impact of accelerating admixtures on the reactivity of supplementary cementitious materials (SCMs), which are widely used as a clinker replacement in blended cements. This was done on synthetic glasses with controlled composition and structure that mimic two types of real SCMs (slag and c...

The effect of two precursors (slag and fly ash), different particle size distribution, and three types of aggregate (siliceous sand, limestone, and recycled concrete) on alkali-activated material (AAM) mortar rheology were studied and compared to their effect on an ordinary Portland Cement (OPC) mortar reference. Stress growth and flow curve tests...

Clinker replacement with supplementary cementitious materials (SCMs) is one of the most successful strategies to reduce the carbon footprint and the embodied energy of Portland cement. The lower dissolution of SCMs and the resulting lower early mechanical strength of concrete can be increased by the addition of accelerators, leading to high clinker...

El cemento de aluminato de calcio (CAC) es un tipo de cemento utilizado en elementos constructivos que necesitan propiedades refractarias, debido a su resistencia a elevadas temperaturas. Sin embargo, este tipo de cemento presenta diversas dificultades para su puesta en obra debido a su fraguado rápido y la dificultad para obtener trabajabilidades...