Nanomodifier based on zinc hydrosilicates for cement systems

Grishina, Anna; Korolev, Evgeniy

doi:10.1063/1.4964538

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…The synthesis technology of the nanomodifier, calculation of the concentration of the precursor of silicic acid (α) was previously described in [24] and [25]. According to [26], the fungicidal properties of the material are possible even if the used fungicides have low concentrations that are not qualitatively determined.…”

Section: Methodsmentioning

confidence: 99%

Aggregative stability of fungicidal nanomodifier based on zinc hydrosilicates

Grishina

Korolev

2018

E3S Web Conf.

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Abstract.Currently, there is a strong need of high performance multi functional materials in high-rise construction. Obviously, such materials should be characterized by high strength; but for interior rooms biosafety is important as well. The promising direction to obtain both high strength and maintain biosafety in buildings and structures is to manage the structure of mineral binders by means of fungicidal nanomodifier based on zinc hydrosilicates. In the present work the aggregative stability of colloidal solutions of zinc hydrosilicates after one year of storage was studied. It has been established that the concentration of iron (III) hydroxide used to prepare the precursor of zinc hydrosilicates has a significant effect on the long-term aggregative stability: as the concentration of iron (III) hydroxide increases, the resistance of the fungicidal nanomodifier increases. It was found that, despite the minimal concentration of nano-sized zinc hydrosilicates (0.028%), the colloidal solution possesses a low long-term aggregative stability; while in the initial period (not less than 14 days) the colloidal solution of the nanomodifier is aggregatively stable. It is shown that when the ratio in the colloidal solution of the amount of the substance CH3COOH / SiO2 = 0.43 is reached, an increase in the polymerization rate is observed, which is the main cause of low aggregative stability. Colloidal solutions containing zinc hydrosilicates synthesized at a concentration of iron (III) hydroxide used to produce a precursor equal to 0.7% have a longterm aggregative stability and do not significantly change the reduced particle. Such compositions are to be expediently used for the nanomodifying of building composites in order to control their structure formation and to create conditions that impede the development of various mycelial fungi.

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Section: Methodsmentioning

confidence: 99%

Aggregative stability of fungicidal nanomodifier based on zinc hydrosilicates

Grishina

Korolev

2018

E3S Web Conf.

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“…The newly developed modifiers for building materials should be safe and also should provide the means for bulk modification. One of such modifiers is the product of precipitation of sodium hydrosilicates with a solution of zinc sulfate [4].…”

Section: Introductionmentioning

confidence: 99%

Structure formation of gypsum binder with zinc hydrosilicates

Grishina

Korolev

2019

E3S Web Conf.

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Due to high danger of mold fungi spores for humans, it is necessary to develop new fungicidal building materials, especially – materials that help to maintain biosafety in interior rooms. One of such materials is the fungicidal gypsum binder. The aim of the present work was to study the process of structure formation of gypsum in case of the presence of a previously developed fungicidal modifier which is based on hydrosilicate systems with zinc in different quantities. The studies were carried out in accordance with current regulations. The rheological and mechanical properties, including normal density, setting time and compressive strength were determined. The titrimetric method of analysis was used for determination of the content of calcium ions in the solution. It was revealed that the zinc content in the modifier does not affect the mobility of the mixture; however, it changes the rate of formation of the gypsum stone and also affects its strength. In particular, when the ratio ν(Zn)/ν(Si) is equal to 0.9, there was an increase of setting time. The mechanism of the formation of gypsum stone also changes: influence of both constructive and destructive factors simultaneously decreases. The latter was confirmed by the peculiarities of the binding of calcium ions in the presence of a fungicidal modifier.

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Nanomodifier based on zinc hydrosilicates for cement systems

Cited by 2 publications

References 14 publications

Aggregative stability of fungicidal nanomodifier based on zinc hydrosilicates

Aggregative stability of fungicidal nanomodifier based on zinc hydrosilicates

Structure formation of gypsum binder with zinc hydrosilicates

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