Effect of superplasticizers on the properties of latex modified gypsum plaster

Sakthieswaran, N.; Sophia, M.

doi:10.1016/j.conbuildmat.2018.05.150

Cited by 40 publications

(15 citation statements)

References 25 publications

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“…It appeared that the first case belonged to physical adsorption, whereas the polycarboxylic molecules were adsorbed on gypsum in the form of chemisorption; the small adsorption amount and the good dispersion stability were confirmed. The results of other authors [22][23][24] showed that the addition of superplasticizer to gypsum-based material gives a dense and well-compacted structure of gypsum crystals, leading to higher strengths in the hardened materials and better water resistance for the gypsum matrix.…”

Section: Introductionmentioning

confidence: 96%

Combined Effect of Photocatalyst, Superplasticizer, and Glass Fiber on the Photocatalytic Activity and Technical Parameters of Gypsum

et al. 2020

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In this study, gypsum plasters enriched with the modified photocatalyst TiO2/N and additive components were prepared and analyzed in detail. The aim of this work was to recognize the combined impact of a photocatalyst, polycarboxylic superplasticizer (SP), and glass fiber (F) on the properties of the composed building materials. The mutual compatibility was verified in relation to self-cleaning and air-purifying activity as well as to the technical parameters defined in standards for gypsum materials. The measurements revealed that photocatalytic gypsum material can have high mechanical strength and limited shrinkage as a result of superplasticizer contribution in form of a water-reducing and well-dispersive agent. Normal consistency was achieved by the addition of 0.01 wt % of SP to photocatalytic gypsum mortar or by the addition of 0.2 wt % of SP with a 12% reduction of water. This study also explains why glass fiber fulfills the role of inner reinforcement only if a superplasticizer is simultaneously added to the gypsum matrix. It is possible, by the combined effect of TiO2/N, a polycarboxylic superplasticizer, and glass fiber, to achieve NOx degradation at a high level. Moreover, the significantly improved self-cleaning properties of the complex gypsum plasters surfaces from dye pollutants in comparison to a gypsum plaster with solely a TiO2/N photocatalyst indicate the synergistic effect of the three considered additives.

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Section: Introductionmentioning

confidence: 96%

Combined Effect of Photocatalyst, Superplasticizer, and Glass Fiber on the Photocatalytic Activity and Technical Parameters of Gypsum

et al. 2020

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“…Along with the dissolution of anhydrite binder, it is important to create conditions for crystallization of gypsum neoplasms, which can be achieved using mineral additives and plasticizers. The combined effect of activators and mineral additives (Magallanes-Rivera et al, 2012;Sakthieswaran & Sophia, 2018 leads to the significant increase in physical and mechanical characteristics of the final composition. The authors of Fomina et al (2018) showed that argillite can be used effectively as an aggregate in the production of aerated concrete.…”

Section: Introductionmentioning

confidence: 99%

A Study on Mechanical Properties and Structure of Anhydrite Binder Modified by Ultra-Dispersed Siltstone

Tokarev

Yakovlev

Saidova

et al. 2020

Engineering Structures and Technologies

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This research is devoted to modification of physical and mechanical properties and structure of a binder based on natural anhydrite. A sedimentary rock siltstone was added into the composition as a mineral ultrafine additive. The presence of aluminosilicate minerals proves that finely ground siltstone can be used as a mineral additive in the composition of the anhydrite binder, accelerating crystallization of gypsum new formations and densifying the structure of gypsum stone. For the first time, the effectiveness of using sodium and ammonium phosphates as hardening activators of an anhydrite binder was shown. Siltstone, added to the composition in the amount from 0 to 5%, lead to up to 40% increase in strength, which is due to the action of siltstone particles as “crystallization centers” and formation of crystalline hydrates of calcium sulfate dihydrate on their surface. Combined action of calcined siltstone and lime leads to a 45% increase in strength due to the additional compaction by new hydration products formed in the course of metakaolin and lime interaction. Microstructural analysis showed that samples with calcined siltstone and lime have a more dense and uniform structure with a lower porosity, compared to those with only natural siltstone.

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“…Polycarboxylate superplasticizer is considered the most effective dispersant of cement-based materials and also demonstrates excellent ability to disperse gypsum particles (Tan et al, 2018;Neuville et al, 2012;Guan et al, 2010). Adding an aqueous solution of polycarboxylate esters increases the strength (Sakthieswaran & Sophia, 2018;Pan & Wang, 2011), reduces water demand (Martin, 2015) and increases the consistency of mixtures (Müller & Hampel, 2018). High workability of mixtures modified with polycarboxylate esters can significantly expand their field of application and makes them suitable for self-leveling floor screeds.…”

Section: Introductionmentioning

confidence: 99%

Fluoroanhydrite Compositions Plasticized by Polycarboxylate Esters

Kalabina

Yakovlev

Dufek

et al. 2020

Engineering Structures and Technologies

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The influence of a plasticizer based on polycarboxylate esters on the properties of a high-strength fluoroanhydrite composition and a lightweight composition with expanded perlite sand is investigated. It was shown that the addition of 2% polycarboxylate esters on water base to compositions has increased compressive strength and a flexural strength up to 46% and 20% respectively compare to composite without any additives. Due to the structure's compaction of the compositions, water absorption decreased and the water resistance of the material increased. Microstructural analysis of the compositions confirmed the improvement of physical and mechanical characteristics by changing the morphology of crystallohydrate formations, increasing the contact area between new formations and modifying the structure by carbon nanotubes. The developed mixtures are supposed to be apply for self-leveling fluid mixtures for floors with reduced thermal conductivity.

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Effect of superplasticizers on the properties of latex modified gypsum plaster

Cited by 40 publications

References 25 publications

Combined Effect of Photocatalyst, Superplasticizer, and Glass Fiber on the Photocatalytic Activity and Technical Parameters of Gypsum

Combined Effect of Photocatalyst, Superplasticizer, and Glass Fiber on the Photocatalytic Activity and Technical Parameters of Gypsum

A Study on Mechanical Properties and Structure of Anhydrite Binder Modified by Ultra-Dispersed Siltstone

Fluoroanhydrite Compositions Plasticized by Polycarboxylate Esters

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Effect of superplasticizers on the properties of latex modified gypsum plaster

Cited by 40 publications

References 25 publications

Combined Effect of Photocatalyst, Superplasticizer, and Glass Fiber on the Photocatalytic Activity and Technical Parameters of Gypsum

Combined Effect of Photocatalyst, Superplasticizer, and Glass Fiber on the Photocatalytic Activity and Technical Parameters of Gypsum

A Study on Mechanical Properties and Structure of Anhydrite Binder Modified by Ultra-Dispersed Siltstone

Fluoro​an​hydrite Compositions Plasticized by Polycarboxylate Esters

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Product

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Fluoroanhydrite Compositions Plasticized by Polycarboxylate Esters