Davide Garufi’s research while affiliated with DSM Innovation Center Netherlands and other places

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Publications (3)


Use of low-grade kaolinite clays in the production of limestone calcined clay cement
  • Article

November 2024

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58 Reads

Journal of Sustainable Cement-Based Materials

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Thomas Schmidt

Figure 3. XRD pattern of as-received cement powder and powders at different times of carbonation.
CO 2,content percentage (%) from Thermal Decomposition in a muffle furnace of as-received cement and carbonated samples; three replicates (I, II and III) and Standard Deviation (St. Dev.) for each carbonation test.
CO 2,uptake percentage (%) from thermal decomposition in a muffle furnace (average of the three replicates) and from TG-DTA of carbonated samples.
Evolution of CO2 Uptake Degree of Ordinary Portland Cement During Accelerated Aqueous Mineralisation
  • Article
  • Full-text available

November 2024

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30 Reads

Ceramics

The utilisation of carbonation treatments to produce building materials is emerging as a valuable strategy to reduce CO2 emissions in the construction sector. It is of great importance to regulate the degree of carbonation when the mineralisation process is combined with hydration, as a high CO2 uptake may impede the development of adequate strength. A significant number of studies focus on attaining the maximum carbonation degree, with minimal attention paid to the examination of the evolution of CO2 uptake over the initial stages of the process. In this context, the present study aims to investigate the evolution of CO2 uptake over time during carbonation. Ordinary Portland Cement (OPC) is employed as material, with aqueous carbonation selected as the mineralisation process. This investigation encompasses a range of carbonation durations, spanning from 5 to 40 min. The analysis of the evolution of the mineral composition with time demonstrated that the rate of the carbonation reaction accelerates in the initial minutes, resulting in the conversion of all the portlandite produced during the hydration process in the initial 10 min. Quantitative analysis of the carbonation degree indicated that the CO2 uptake at 40 min is equal to 19.1%, which is estimated to be approximately 70% of the maximum achievable value. By contributing to the understanding of the early carbonation mechanisms in aqueous conditions of OPC, this study provides valuable support for further investigation focused on the use of cement mineralisation processes to produce building materials.

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CO2 Sequestration Through Aqueous Carbonation of Electric Arc Furnace Slag

April 2024

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78 Reads

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4 Citations

Journal of Advanced Concrete Technology

Electric Arc Furnace slag (EAF slag) reuse is currently limited by its inconsistent chemical composition and volume instability. However, the alkaline composition suggests the possibility to use this material for carbon capture and storage. This study investigated the CO2 uptake of EAF slag using a direct aqueous carbonation technique. The process was implemented at room temperature and ambient pressure, with minimized energy consumption. The CO2-reactive phases were identified through X-ray diffraction analysis. Different CO2 quantification techniques were employed: thermogravimetric analysis, acid digestion and thermal decomposition. The replicability of experiments and quantification techniques was assessed through analysis of variance and pairwise comparisons. The average CO2 uptake and coefficient of variation resulted respectively 7.9% and 9.0%, with a carbonation degree of about 34%, proving that this simple mineralization process can be promising even in mild conditions.

Citations (1)


... Ceramics 2024, 7 1712 process can be induced to produce either precast building blocks [10,11] or carbonated powder for use in a cement blend [12,13]. The aqueous carbonation method is a technique that is widely employed for the production of carbonated powder. ...

Reference:

Evolution of CO2 Uptake Degree of Ordinary Portland Cement During Accelerated Aqueous Mineralisation
CO2 Sequestration Through Aqueous Carbonation of Electric Arc Furnace Slag
  • Citing Article
  • April 2024

Journal of Advanced Concrete Technology