Effects of Nano-CaCO3 on the Properties of Cement Paste: Hardening Process and Shrinkage at Different Humidity Levels

Cai, Yamei; Hou, Pengkun; Zhou, Zhen; Cheng, Xin

doi:10.5703/1288284316132

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…It provides a much more consistent control of concrete flowability to be used in digital manufacturing (Chu et al, 2021). It also provides enhanced strength, while reducing shrinkage during hydration (Cai et al, 2016). Finally, it drastically reduces the loss of water at temperatures as high as 800 C (Salih et al, 2020).…”

Section: Other Mineral Additionsmentioning

confidence: 99%

Nano-modification in digital manufacturing of cementitious composites

Filho

Chen

Çopuroğlu

2022

Recent Advances in Nano-Tailored Multi-Functional Cementitious Composites

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Section: Other Mineral Additionsmentioning

confidence: 99%

Nano-modification in digital manufacturing of cementitious composites

Filho

Chen

Çopuroğlu

2022

Recent Advances in Nano-Tailored Multi-Functional Cementitious Composites

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“…Nanosilica resulted to be a cement hardening accelerator, while nanoalumina was identified as a retarder. As Cai et al [ 111 ] demonstrated, nano-CaCO 3 accelerates the hardening process and decreases the shrinkage, although a high curing humidity of the samples is needed to improve the durability of cement-based composites.…”

Section: Nanoinclusionsmentioning

confidence: 99%

Nano-Inclusions Applied in Cement-Matrix Composites: A Review

et al. 2016

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Research on cement-based materials is trying to exploit the synergies that nanomaterials can provide. This paper describes the findings reported in the last decade on the improvement of these materials regarding, on the one hand, their mechanical performance and, on the other hand, the new properties they provide. These features are mainly based on the electrical and chemical characteristics of nanomaterials, thus allowing cement-based elements to acquire “smart” functions. In this paper, we provide a quantitative approach to the reinforcements achieved to date. The fundamental concepts of nanoscience are introduced and the need of both sophisticated devices to identify nanostructures and techniques to disperse nanomaterials in the cement paste are also highlighted. Promising results have been obtained, but, in order to turn these advances into commercial products, technical, social and standardisation barriers should be overcome. From the results collected, it can be deduced that nanomaterials are able to reduce the consumption of cement because of their reinforcing effect, as well as to convert cement-based products into electric/thermal sensors or crack repairing materials. The main obstacle to foster the implementation of such applications worldwide is the high cost of their synthesis and dispersion techniques, especially for carbon nanotubes and graphene oxide.

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“…The kinetics of cement hydration and thus its hardening can be altered by the addition of nanoparticles. Nano-CaCO 3 can be applied as an accelerator (and additionally at lower shrinkage) of the hardening development [ 150 ], while nanoalumina can be used as a retardation additive [ 151 ].…”

Section: Nanoinclusionsmentioning

confidence: 99%

Admixtures in Cement-Matrix Composites for Mechanical Reinforcement, Sustainability, and Smart Features

et al. 2016

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For more than a century, several inclusions have been mixed with Portland cement—nowadays the most-consumed construction material worldwide—to improve both the strength and durability required for construction. The present paper describes the different families of inclusions that can be combined with cement matrix and reviews the achievements reported to date regarding mechanical performance, as well as two other innovative functionalities of growing importance: reducing the high carbon footprint of Portland cement, and obtaining new smart features. Nanomaterials stand out in the production of such advanced features, allowing the construction of smart or multi-functional structures by means of thermal- and strain-sensing, and photocatalytic properties. The first self-cleaning concretes (photocatalytic) have reached the markets. In this sense, it is expected that smart concretes will be commercialized to address specialized needs in construction and architecture. Conversely, other inclusions that enhance strength or reduce the environmental impact remain in the research stage, in spite of the promising results reported in these issues. Despite the fact that such functionalities are especially profitable in the case of massive cement consumption, the shift from the deeply established Portland cement to green cements still has to overcome economic, institutional, and technical barriers.

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Effects of Nano-CaCO3 on the Properties of Cement Paste: Hardening Process and Shrinkage at Different Humidity Levels

Cited by 10 publications

References 19 publications

Nano-modification in digital manufacturing of cementitious composites

Nano-modification in digital manufacturing of cementitious composites

Nano-Inclusions Applied in Cement-Matrix Composites: A Review

Admixtures in Cement-Matrix Composites for Mechanical Reinforcement, Sustainability, and Smart Features

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