Development of nanomodified rapid hardening clinker-efficient concretes based on composite Portland cements

Kropyvnytska, Тetiana; Sanytsky, Myroslav; Rucińska, Teresa; Rykhlitska, Oksana

doi:10.15587/1729-4061.2019.185111

Cited by 19 publications

(15 citation statements)

References 27 publications

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“…When determining the indicators of free energy of the surface, it is established that with an increase in the amount of titanium dioxide in the volume of the mortar, the energy of the surface decreases, which indicates the improvement of the operational characteristics of such mortars. 4. It has been determined that the improved characteristics are achieved when adding 2.0 wt.…”

Section: Discussionmentioning

confidence: 99%

“…A fundamental characteristic of cement systems, which largely determines their properties, is their granulometric composition, determined by the particle size distribution. The average diameter per volume D [4,3] for Portland cement CEM II/B-M is 26.3 µm, with the average diameter per specific surface D [3,2] corresponds to 4.02 µm. For the Portland cement СЕМ ІІ/В-М, the residue on a sieve of 45 µm is 12.6 wt.…”

Section: Studying the Particle Size Distribution In Cement Systemsmentioning

confidence: 99%

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The effect of sulfur- and carbon-codoped TiO2 nanocomposite on the photocatalytic and mechanical properties of cement mortars

Hohol

Sanytsky

Kropyvnytska

et al. 2020

EEJET

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tional materials of the new generation [1-4] is an important task and priority in construction. Among these materials are the nanomodified cement mortars with the photocatalytic and hydrophobic properties. Multifunctional cement composites containing the nano-sized titanium dioxide ensure the self-purifying properties and the ability to clean air from organic pollutants. This makes it possible to build smart functional buildings that provide the effect of self-cleaning, as well as the antimicrobial properties, and help clean the air 1. Introduction The development of modern technologies in the construction industry gives rise to the new format of housingmulti-comfortable houses. The "Active House" concept of such buildings predetermines the need for a synergic combination of key factors such as energy efficiency, comfort, and healthy living conditions. At present, the development of nanotechnologies that can be used for designing multifunc

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Section: Discussionmentioning

confidence: 99%

Section: Studying the Particle Size Distribution In Cement Systemsmentioning

confidence: 99%

The effect of sulfur- and carbon-codoped TiO2 nanocomposite on the photocatalytic and mechanical properties of cement mortars

Hohol

Sanytsky

Kropyvnytska

et al. 2020

EEJET

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“…Many studies have confirmed that the surface activity of NS with cement, during the hydration process, is much higher than that of SF and cement, as a result of which the consumption rate of CH is much higher in the case of NS. Moreover, the volume fraction of the high-stiffness C-S-H gel increases significantly in NS-modified specimens, as compared to SF-modified ones [15][16][17].…”

Section: Isothermal Calorimetrymentioning

confidence: 91%

The microstructural and thermal characteristics of silica nanoparticle-modified cement mortars after exposure to high temperatures. Part I

Sikora¹

2020

Nanobuild

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This study presents an investigation of the effects of high temperature on the thermal and microstructural properties of cement mortars modified with nanosilica. In the first stage of the research, the effects of nanosilica (NS) and silica fume (SF) on the hydration and compressive strength of cementitious composites were compared. In the second stage, four different types of cement mortars, containing an optimal dosage of NS, were produced. Two of them contained a normal weight aggregate (quartz or limestone), whilst two contained a heavy weight aggregate (barite or magnetite). Specimens without NS were produced for control purposes. The specimens were exposed to 300, 450, 600 and 800°C, with their post-heating properties-including thermal conductivity, specific heat, solvent absorption and cracking behavior-analyzed. The results show that NS exhibits significantly higher reactivity with cement than SF. NS accelerates the cement hydration process and contributes more significantly to the 28 and 365 day compressive strength of mortar, as compared to SF. The incorporation of NS in a composite substantially decreases the amount of CH in the mixture and leads to the production of additional C-S-H gel phase, which improves microstructure. The study also shows that NS contributes to a decrement in the thermal conductivity and density of mortar, both prior to and after heating. The incorporation of NS has a beneficial effect on decreasing the deterioration rate of mortars after heating, by decreasing absorption rate and the amount of cracks in in them.

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“…Due to the environmental impact of the cement industry in the direction of sustainable development, by selecting appropriate combinations of non-clinker components in low-carbon cements will be an alternative to traditional cements [10][11][12][13]. At the same time, more and more attention are paid to the production of lowcarbon concretes.…”

Section: Introductionmentioning

confidence: 99%

Sustainable low-carbon binders and concretes

et al. 2020

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Sustainable development depends on a consistency of interests, social, ecological and economic, and that the interests are evaluated in a balanced manner. In order to reduce CO2 emissions, the conception of decreasing clinker factor and increasing the role of supplementary cementitious materials (SCMs) in the cementitious materials has high economical and environmental efficiency. The performance of clinkerefficient blended cements with supplementary cementitious materials were examined. The influence of superfine zeolite with increased surface energy on the physical and chemical properties of low-carbon blended cements is shown. Increasing the dispersion of cementitious materials contributes to the growth of their strength activity index due to compaction of cement matrix and pozzolanic reactions in unclincker part. In consequence of the early structure formation and the directed formation of the microstructure of the cement matrix is solving the problem of obtaining clinker-efficient concretes. Shown that low-carbon blended cements with high volume of SCMs are suitable, in principle, for producing structural concretes.

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Development of nanomodified rapid hardening clinker-efficient concretes based on composite Portland cements

Abstract: Liquid glass and aqueous solutions of silicates, as a promising basis for technological processes of new nanocomposite materials. Inzhenerniy vestnik Dona.

Cited by 19 publications

References 27 publications

The effect of sulfur- and carbon-codoped TiO2 nanocomposite on the photocatalytic and mechanical properties of cement mortars

The effect of sulfur- and carbon-codoped TiO2 nanocomposite on the photocatalytic and mechanical properties of cement mortars

The microstructural and thermal characteristics of silica nanoparticle-modified cement mortars after exposure to high temperatures. Part I

Sustainable low-carbon binders and concretes

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