Hydration process of natural hydraulic lime blended cement mortars

Author(s): Reda Jaafri, Emmanuel Rozière, Syed Yasir Alam, Ahmed Loukili
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 219-224
Total Pages: 6
Language : English

Abstract: This paper presents the influence of natural hydraulic lime (NHL) on setting and early-age hydration of cement-based materials. A reference mortar was designed with a water-to- cement ratio of 0.6. At a constant paste volume, cement was replaced with increasing mass proportions of 12.5%, 25% and 50% of NHL. The freshly mixed mortars were tested for hydration process and setting properties. Thermogravimetry and differential scanning calorimetry measurements were also carried out. The undertaken experimental approach shows that the nucleation on NHL particles leads to an acceleration of early-age hydration and a reduction of initial setting time. Thermal analyses also show faster production of portlandite and ettringite during the acceleration period of hydration. This rapid formation of hydration products at early age could provide a considerable benefit in shrinkage mitigation.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00