Regularities of Change in the Properties of Paint Coatings on Cement Concretes at Moistening

Логанина, В. И.; Fediuk, Roman; Usanova, Kseniia; Timokhin, Roman

doi:10.1007/978-3-030-42351-3_1

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…Zhu et al [ 16 ] researched the effects of carbon nanofibers on the hydration and geopolymerization of low- and high-calcium geopolymers. Numerous studies in recent years have been devoted to the joint and separate use of fly ash and rice husk ash in alkali-activated materials [ 17 , 18 , 19 , 20 ].Various methods of activating binders for alkali-activated materials are being developed and constantly improved [ 21 ]. Yavuz et al [ 22 ] characterized class C and F fly ashes based geopolymers that incorporated silica fume.…”

Section: Introductionmentioning

confidence: 99%

Recycling of Cement Industry Waste for Alkali-Activated Materials Production

et al. 2022

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The cement industry is recognized as an environmental nuisance, and so there is a need to not only minimizes the consumption of cement, but also to completely recycle the waste of the cement industry. This paper’s originality lies in the fact that, for the first time, a comprehensive study of the structure formation of alkali-activated materials (AAM) based on aspiration dust and clinker dust has been carried out. The tasks for achieving this goal were to characterize cement production waste as a new binder and comprehensively research the microstructure, fresh, physical, and mechanical properties of alkali-activated material based on a cement-free binder. Grains of cement production waste are represented by coarse volumetric particles with pronounced cleavage, and a clear presence of minerals is observed. The mineral composition of cement production waste is characterized by calcium silicates, which guarantee good binding properties. The results of the X-ray diffraction analysis of the samples (based on the alkaline-activated cement-free binder using clinker dust and aspiration dust) confirmed the presence of calcite, quartz, feldspar close to albite, micas, and zeolites. The obtained products of the chemical interaction of the binder components confirm the effectiveness of the newly developed AAM. As a result of comparing several binders, it was found that the binder based on aspiration dust with Na2SiO3 and Na2SiF6 was the most effective, since, for specimens based on it, a density of 1.8 g/cm3, maximum compressive strength of 50.7 MPa, flexural strength of 5.6 MPa, minimum setting time (starting at 24 min and ending at 36 min), and water absorption of 12.8 wt. % were obtained. The research results will be of interest to specialists in the construction industry since the proposed recipes for eco-friendly, alkali-activated materials are an alternative to expensive and energy-intensive Portland cement, and they provide for the creation of strong and durable concrete and reinforced concrete composites.

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Section: Introductionmentioning

confidence: 99%

Recycling of Cement Industry Waste for Alkali-Activated Materials Production

et al. 2022

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“…Thus, to assess the solidity of the finishing layer, it is necessary to study the process of peeling and cracking [4][5][6][7][8]. In the process of destruction, local changes in the structure of polymer coatings are observed, which are caused by their structure, flexibility of macrochains and the presence of supramolecular formations [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Mechanism of Adhesive Destruction Coatings

Логанина

2021

DDF

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Information on deformation of coatings at different loading levels during peeling is given. It is shown that the deformations of the organosilicon coating appear already at the initial stages of loading, and the obtained data correlate with the data on acoustic emission. For a polyvinyl acetate coating at low loading levels, equal to 0.3-0.4 R, the release of acoustic signal energy is not observed. The absence of signals with a large amplitude at loading levels up to 0.7-0.8 R indicates the development of plastic deformations in the contact zone of the coating with the substrate. It was found that early localization of bond breaking in the contact zone, leading to the formation of a fracture focus, occurs in organosilicon coatings KO-168. For PVAC coatings, an abrupt growth of cracks is characteristic, which is preceded by its slow growth. The pseudoplastic mechanism of destruction of PVAC coatings has been established. The influence of the nature of the substrate on the change in the nature of the peeling of the coatings is considered.

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“…They buffer the resulting moisture and remove it from the condensation place back towards the room. The method of finishing the insulation from the inside, materials used [12] including the paint coating [13], also influences the preservation of moisture in the wall. The hygroscopic storage capacity of vapor-permeable, capillary-active interior insulation systems may allow for humidity in indoor air to be buffered.…”

Section: Introductionmentioning

confidence: 99%

Implementation of the Indoor Environmental Quality (IEQ) Model for the Assessment of a Retrofitted Historical Masonry Building

Piasecki

Radziszewska–Zielina

Czerski³

et al. 2020

Energies

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Achieving a satisfactory level for indoor environments of historical buildings is an ongoing problem that needs to be solved due to a large demand for deep retrofits in the whole of Europe. The implementation of the indoor environmental quality index (IEQ) to predict an occupant’s satisfaction in thermo-modernized historical buildings is a new concept which is a response to existing needs. In this article, a relevant study is provided with the intention to evaluate the indoor environmental performance of retrofitting effects in historical buildings dating back to the years 1873–1878. Considering the historical character of the buildings, some of the cellar spaces were fitted out with an innovative internal insulation system of mineral sheets based on calcium silicate to prevent water vapor condensation and effectively limit mold growth. The IEQ methodology was applied for retrofitted and non-retrofitted spaces as a comparison. Four essential components of indoor quality are investigated: thermal comfort, indoor air quality, acoustic comfort, and visual quality. The results of sub-component indexes are calculated based on the measured indoor parameters and the specific sensory functions. This paper discusses the results of an indoor environmental analysis including a mycological air quality assessment with the newly developed IAQindex (fungal air contamination index), total volatile organic compound concentration (TVOC), CO2, and formaldehyde (HCHO) assessment, the evaluation energy-related thermal comfort, acoustic, and visual quality, of modernized spaces. A questionnaire survey study was additionally carried out among a building’s users intentioned to compare the accounts of satisfaction before and after the retrofitting process and also to compare “subjective” results with the one’s based on in situ tests. The retrofitting approach was proven to be effective in limiting the presence of molds and a significant difference in indoor environmental quality between thermally insulated and uninsulated spaces was observed and discussed.

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Regularities of Change in the Properties of Paint Coatings on Cement Concretes at Moistening

Cited by 6 publications

References 16 publications

Recycling of Cement Industry Waste for Alkali-Activated Materials Production

Recycling of Cement Industry Waste for Alkali-Activated Materials Production

Assessment of the Mechanism of Adhesive Destruction Coatings

Implementation of the Indoor Environmental Quality (IEQ) Model for the Assessment of a Retrofitted Historical Masonry Building

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