Nanomechanical characterization of cement-based pastes enriched with SiO2 nanoparticles

Zyganitidis, I.; Stefanidou, Maria; Kalfagiannis, N.; Logothetidis, S.

doi:10.1016/j.mseb.2011.05.005

Cited by 65 publications

(21 citation statements)

References 23 publications

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“…In both cases, the addition of them improves the performance of cement; in fresh mixtures an improvement of rheological properties has been recorded [10] and in the hardened state, the compressive strength was increased [11,12]. The nano-scale observations revealed the nanocrystallized structure of CSH [13,14] and also NPs have been found to act as nuclei for cement phases, promoting their hydration [15,16].…”

Section: Introductionmentioning

confidence: 99%

Chemical and Engineering Properties of Blended Cement Containing Micro- and Nano-silica

Ahmed¹,

Sabrah²,

Mohamed³

et al. 2017

AJCHE

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Nano-technology (NT) and nano-materials (NMs) has attracted considerable scientific attention, due to the new potential uses of nano-particles (NPs), which can change the concrete world. There is a great interest in replacing a long time used materials in concrete structure by NMs to improve the different properties of concrete. In this study, the hydration characteristics and microstructure of cement pastes and mortars with and without nano-silica (NS) were studied. Blended cement mix containing 10 mass, % silica fume (SF) was prepared, then the cement mix was partially replaced by NS up 1.5 mass, %. The results show that, NS increases the water of consistency and final setting time The values of chemically combined water, free lime, bulk density and compressive strength prove that, NS up to 1% seems to be an effective mineral additive for blending with OPC to improve its chemical and engineering properties. This is mainly attributed to that; NS behaves not only as filler to improve microstructure, but also as pozzolanic material (PZM). The formation of more hydrated silicates in presence of NS was confirmed by XRD, DTA, IR and SEM examinations. At 1.5 mass, % NS, the density and strength are reduced but still higher than those of 0.0 and 0.5% NS. Also, the results indicate that, the substitution of blended cement mix (OPC+10% SF) with 1 mass, % NS gives a reasonable hydration characteristics and improved engineering properties more than those of 0.0 and 0.5% NS at all hydration ages up to 90 days. Therefore, this level of NS is suggested to be the most suitable replacement level.

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Section: Introductionmentioning

confidence: 99%

Chemical and Engineering Properties of Blended Cement Containing Micro- and Nano-silica

Ahmed¹,

Sabrah²,

Mohamed³

et al. 2017

AJCHE

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“…Instrumented indentation provides mechanical access to the C-S-H phases and has been exploited apart from fundamental studies (Constantinides et al, 2003;Constantinides andUlm, 2004, 2007;Mondal et al, 2007Mondal et al, , 2008Vandamme and Ulm, 2009;Vandamme et al 2010;Chen et al, 2010;Ulm et al, 2010;Xu and Yao, 2011;Song et al, 2011) but also for the evaluation of chemical degradation phenomena DeJong and Ulm, 2007), and the nanomechanical quality of various cementbased systems like alkali activated aluminosilicates (Nemecek et al, 2010), ultra high performance concrete (Sorelli et al, 2008), fi ber reinforced systems (Wang et al, 2009;Sakulich and Li, 2011), nanosilica concrete (Zyganitidis et al, 2011), and carbon nanotube reinforced concrete (Sáez de Ibarra et al, 2006;Konsta-Gdoutos et al, 2010a). The technique can potentially serve as a nanomechanical screening tool in the search for a more durable and environmentally friendly material.…”

Section: Nanoindentationmentioning

confidence: 99%

Nanoscience and nanoengineering of cement-based materials

Constantinides

2013

Nanotechnology in Eco-Efficient Construction

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“…One of the reason for use of nanomaterials in the cement composites is strengthening of the transition zone. The nanoindentation method is increasingly used in testing of nanoproperties of composites modified in this way [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Application of the nanoindentation method in assessing of properties of cement composites modified with silica-magnetite nanostructures

et al. 2018

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Abstract.The results of investigation of the cement composites modified with 5% of silica-magnetite nanostructures of the core-shell type are presented in the paper. The nanoindentation method employing three-sided pyramidal Berkovich indenter was used in the research. The mechanical properties and microstructure of the modified cement composites were evaluated on the basis of the values of hardness and indentation modulus measured inside the cement matrix and in the aggregate-paste interfacial zone. The results were compared with those obtained for the reference composites without nanostructures. The positive influence of the presence of silica-magnetite nanoparticles on the tested properties was found out.

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Nanomechanical characterization of cement-based pastes enriched with SiO2 nanoparticles

Cited by 65 publications

References 23 publications

Chemical and Engineering Properties of Blended Cement Containing Micro- and Nano-silica

Chemical and Engineering Properties of Blended Cement Containing Micro- and Nano-silica

Nanoscience and nanoengineering of cement-based materials

Application of the nanoindentation method in assessing of properties of cement composites modified with silica-magnetite nanostructures

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