Influence of curing temperature on belite cement hydration: A comparative study with Portland cement

Journal Article · Wed Sep 15 04:00:00 EDT 2021 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2021.106499· OSTI ID:23206247

Shirani, Shiva; Cuesta, Ana; Morales-Cantero, Alejandro; De la Torre, Angeles G. ^[1]; Olbinado, Margie P. ^[2]

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1. Departamento de Química Inorgánica, Cristalografía y Mineralogía, Universidad de Málaga, Málaga 29071 (Spain)
2. Paul Scherrer Institut, 5232 Villigen PSI (Switzerland)

Belite cements (BCs) could be a more sustainable binder than Portland cements (PCs) but adequate knowledge of the hydration features has still to be built. In particular, the mild curing hydration temperature effects have been extensively studied for PCs but not for BCs. This research was triggered by a previous work reporting improved mechanical strengths of BCs at higher curing temperatures. Here, we report the hydration characteristics of a BC at 20, 40 and 60 °C and compared to those of a typical PC. We have corroborated previous findings and used a multi-technique approach including Rietveld phase analysis, thermal analysis, calorimetry, silicon MAS-NMR, mercury intrusion porosimetry and chiefly synchrotron X-ray microtomography, to thoroughly understand the different behavior. In a nutshell, the improved mechanical performances at mild curing temperatures for BCs are mainly due to a much larger belite degree of reaction, with lower porosity coarsening of belite cements also playing a role.

• OSTI ID: 23206247
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Vol. 147; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALORIMETRY
COMPARATIVE EVALUATIONS
MERCURY
MICROSTRUCTURE
NUCLEAR MAGNETIC RESONANCE
PHASE STUDIES
PLUTONIC ROCKS
POROSITY
PORTLAND CEMENT
SILICON
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
X RADIATION