Nano-modified cementing composites for self-cleaning building materials

Sanytsky, Myroslav; Kropyvnytska, Тetiana; Hohol, Marko; Kotiv, Roman

doi:10.17512/bozpe.2020.1.01

Cited by 5 publications

(2 citation statements)

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“…The mathematical programming method was used to study the effect of titanium dioxide and kaolin additives on the mechanical properties of nanomodified multicomponent cement. The results obtained by XRD and SEM methods showed that the addition of TiO 2 nanoparticles with a high specific surface area to the cement paste would result in the formation of a denser microstructure in the cemented matrix [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Nanomodified Waterproofing Agent on the Performance of Rigid Waterproof Concrete in Underground Engineering

Sun

Shi

Liu

2022

Journal of Nanomaterials

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Waterproof and impermeable problems seriously affect the safe use, normal structure, and working life of concrete projects. The waterproof performance of concrete can be improved by mixing with a proper amount of waterproofing agent; nevertheless, the early strength of concrete will be seriously affected. With the development of complex structures such as larg e spans in soil and water engineering and the increasingly complex engineering environment, people have put forward higher requirements for the working performance, strength, impermeability, durability, and intelligence of cement-based materials required. This article compares the changes in compressive strength, fluidity, and water permeability of mixed concrete by controlling the two variables of waterproofing agent and nanosilica. Combining the results of XRD microstructure analysis, the influence of nanosilica and waterproofing agent on the performance of concrete is explored. Moreover, it is hoped that other excellent properties of concrete can be improved, and a waterproof material with good opacity can be found. The test results show that after adding waterproofing agent alone, the 3 d compressive strength of concrete is decreased by 14.81%, the water permeability is reduced by 71.6%, and the depth of carbonic acid molecules at 28 d is also decreased by 37.3%. On the other hand, compared with concrete using waterproof coating alone, after adding in nanosilica, the 3 d compressive strength is increased by about 30%, and the water immersion height is decreased. The results show that the addition of polymer has a great influence on the compressive strength and carbonic acid resistance of concrete.

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Section: Introductionmentioning

confidence: 99%

Influence of Nanomodified Waterproofing Agent on the Performance of Rigid Waterproof Concrete in Underground Engineering

Sun

Shi

Liu

2022

Journal of Nanomaterials

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“…Z O.O., Poland), porcelain mortar and co-modified photocatalyst TiO 2 /N, C in various amounts by weight self-cleaning properties and photocatalyst [93] Ru x Ti 1−x O 2 nanobelts RuO 2 heteroatoms were introduced into the structure of TiO 2 by the sol-gel method environmental remediation-photocatalic decomposition of organic compounds [94] TiO 2 (P25) cement (Portland CEM I 52.5 R grey and white): normalized sand:water ratio of 1:3:0.5, were prepared in accordance with standard EN196-1; the Aeroxide TiO 2 P25 (P25) catalyst was used in 5-10% wt. NO x oxidation in different conditions of humidity (RH: 0 and 65%) and illumination (Vis or Vis/UV) OPC) CEM I 42.5R manufactured by PJSC "Ivano-Frankivskcement" and composed of C3S: 61.35, C2S: 13.52, C3A: 6.75, C4AF: 12.02, wt.%; natural pozzolan-zeolite tuff SiO 2 , limestone powder with 95 wt.% CaCO 3 as a micro filler; minor ultrafine additives-kaolin and TiO 2 -were added to the cementing composites; TIOXIDE ® R-FC5 pigment (fine crystal rutile pigment), n-TiO 2 powder (PC-Series) with an anatase crystalline structureimprovement of mechanical properties, self-cleaning properties and photocatalyst[96]…”

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confidence: 99%

Self-Cleaning Coatings and Surfaces of Modern Building Materials for the Removal of Some Air Pollutants

et al. 2021

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Air quality is one of the most important problems of the modern world, as it determines human health and changes occurring in other elements of nature, including climate change. For this reason, actions are taken to reduce the amount of harmful substances in the air. One such action is the use of building materials with special properties achieved by the application of self-cleaning coatings and photocatalytic additives. This article presents achievements in the field of additives and modifiers for building materials, whose task is to improve air quality. Concrete, cement, paints, and facade coatings modified based on the achievements of nanotechnology have been analyzed in terms of new properties and the possibility of their application in the area of modern environmental requirements. Both positive aspects and doubts were described in the scope of the effective reduction of the amount of gases such as VOC, NOx, dust and microorganisms.

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