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

Horszczaruk, Elżbieta; Jędrzejewski, Roman; Baranowska, J.; Mijowska, Ewa

doi:10.1051/matecconf/201816302002

Cited by 3 publications

(6 citation statements)

References 13 publications

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“…The nanoindentation method or AFM technique for evaluation of the ITZ between aggregate and paste, as well as between the particular phases of the cement matrix, require the extremely careful preparation of the tested surface of the composite. As described by Horszczaruk et al [90], the nanoindentation modulus and hardness of the cement matrix in the ITZ area of the aggregate-paste were measured. The tested objects were specially prepared specimens of the paste modified with 5% nano-Fe 3 O 4 with a nano-SiO 2 shell on the border of the gravel aggregate with a diameter of 10–15 mm.…”

Section: Properties Of Cement Composites Containing Nano-fe3o4mentioning

confidence: 99%

“…After 28 days of curing, the specimen was cut to half its height and carefully polished. The details of the preparation method of the specimen surface have been described in Horszczaruk et al [90]. The test results were compared with the reference sample made from the paste without MN admixture.…”

Section: Properties Of Cement Composites Containing Nano-fe3o4mentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Horszczaruk¹

2019

Materials

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Despite the many available studies on the evaluation of the influence of nanomaterials on the properties of cement-based composites, the effects of some nanoparticles have not yet been fully recognized. Among the unrecognized nanomaterials are magnetite nanoparticles (MN). The literature devoted to this subject is limited. This paper reviews state-of-the-art research carried out on the effect of MN on the properties of cement-based composites. Detailed descriptions of the processing, microstructures (hydration products), properties (hydration, workability, mechanical and functional properties, and durability), and probability applications of MN-engineered cementitious composites are presented. Particular attention has been paid to MN application methods to the cement composite. Finally, the risks, challenges, and future development of MN-modified cement-based composites is discussed.

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Section: Properties Of Cement Composites Containing Nano-fe3o4mentioning

confidence: 99%

Section: Properties Of Cement Composites Containing Nano-fe3o4mentioning

confidence: 99%

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Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Horszczaruk¹

2019

Materials

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“…The “protective” features of NS at the high temperature are used for chemical modification of the other nanomaterials. The use of nanoshells of NS enables obtaining the specific performance of the cement composites at high temperatures [ 35 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-SiO2 on the Microstructure and Mechanical Properties of Concrete under High Temperature Conditions

et al. 2021

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The aim of the research was to determine how the admixture of nanosilica affects the structure and mechanical performance of cement concrete exposed to high temperatures (200, 400, 600, and 800 °C). The structural tests were carried out on the cement paste and concrete using the methods of thermogravimetric analysis, mercury porosimetry, and scanning electron microscopy. The results show that despite the growth of the cement matrix’s total porosity with an increasing amount of nanosilica, the resistance to high temperature improves. Such behavior is the result of not only the thermal characteristics of nanosilica itself but also of the porosity structure in the cement matrix and using the effective method of dispersing the nanostructures in concrete. The nanosilica densifies the structure of the concrete, limiting the number of the pores with diameters from 0.3 to 300 μm, which leads to limitation of the microcracks, particularly in the coarse aggregate-cement matrix contact zone. This phenomenon, in turn, diminishes the cracking of the specimens containing nanosilica at high temperatures and improves the mechanical strength.

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“…Currently, both methods are commonly used in the field of building materials testing with the aim of evaluation the resistance of materials to the cracks initiation and propagation [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Complex evaluation of the mechanical and fracture properties of cementitious materials with different water-cement ratio

Kucharczyková¹

2019

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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This paper is aimed at the development of the physical, mechanical and fracture characteristics of cementitious materials during ageing. Three mortars which differed only in the water-cement ratio (w/c) were prepared for manufacturing of the test specimens intended for the experiments. All mortars were prepared using the standardized quartzite sand with the particle grain size distribution of 0−2 mm CEN 196-1, CEM I 42.5 R Portland cement (cement plant Mokrá, Czech Republic) and water. The reference w/c was set to the value of 0.5. To produce two other mortars, this ratio was reduced by approx. 5 and 30 %. This resulted in w/c ratio 0.47 and 0.35 respectively. All test specimens were not protected intentionally from drying during the whole time of measurement and were stored in laboratory at ambient temperature of 21 ± 2 °C and relative humidity of 60 ± 10 %. The results of the shrinkage, elastic, fracture and strength parameters determined within the time interval from 3 days to 2 years of ageing are summarized and discussed in the paper. The results of performed experiments were partially published within the conference DYN-WIND'17. This paper focuses especially on the evaluation of the results obtained after 2 years of specimens ageing and also provides a complex discussion of the results gathered during the whole time of ageing. The results show a crucial impact of the w/c on the final values of mechanical and fracture characteristics. The early-age and long-term characteristics were substantially influenced by the poor curing conditions.

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

Cited by 3 publications

References 13 publications

Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Properties of Cement-Based Composites Modified with Magnetite Nanoparticles: A Review

Effect of Nano-SiO2 on the Microstructure and Mechanical Properties of Concrete under High Temperature Conditions

Complex evaluation of the mechanical and fracture properties of cementitious materials with different water-cement ratio

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