One of the main technical challenges regarding alkali-activated materials (AAM) is to overcome their tendency to suffer severe drying shrinkage. In this work, the feasibility of using CaO-based admixtures to mitigate drying shrinkage phenomena was investigated and its effects on fresh pastes and hardened specimens’ properties described. The obtained results showed that increasing CaO-rich admixtures dosage up to 3.0 wt% has a beneficial impact on AAMs volumetric stability. Notwithstanding, elevated CaO dosages induced detrimental modifications on pastes workability suggesting a dosage threshold of 2.0 wt%.
THE EFFECT OF CaO-RICH ADMIXTURES ON CONTROLLING DRYING SHRINKAGE OF ALKALI ACTIVATED MATERIALS
G. ASCENSÃO
Writing – Original Draft Preparation
;F. FALESCHINIWriting – Review & Editing
;
2019
Abstract
One of the main technical challenges regarding alkali-activated materials (AAM) is to overcome their tendency to suffer severe drying shrinkage. In this work, the feasibility of using CaO-based admixtures to mitigate drying shrinkage phenomena was investigated and its effects on fresh pastes and hardened specimens’ properties described. The obtained results showed that increasing CaO-rich admixtures dosage up to 3.0 wt% has a beneficial impact on AAMs volumetric stability. Notwithstanding, elevated CaO dosages induced detrimental modifications on pastes workability suggesting a dosage threshold of 2.0 wt%.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
