Modified gypsum compounds: An ecological–economical choice to improve traditional plasters

Magallanes-Rivera, R.X.; Juárez-Alvarado, César A.; Valdez, P.; Mendoza-Rangel, J. M.

doi:10.1016/j.conbuildmat.2012.07.054

Cited by 62 publications

(14 citation statements)

References 16 publications

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“…1 shows XRD results for 30% commercial gypsum pastes cured for up to 600 days where hemihydrate (HH) reflections were absent at all the studied ages, and readily identifiable gypsum peaks (20.8, 11.7 and 29.3°2h) were noted from one day of curing. This indicated complete hydration of HH after 24 h, in agreement with [6]. Small peaks of anhydrite and calcite as remnants after the commercial gypsum manufacture are noted after 600 days, while quartz (SiO 2 ) was similarly present for the pastes with PFA.…”

Section: Resultssupporting

confidence: 74%

“…up to 1% for 50%CG. The latter behavior can result from the higher GGBFS content, which made more reactive Al 2 O 3 available to form ettringite; it is important to mention that the samples did neither exhibit cracking nor drastic strength losses, as several reports for gypsum based binders also indicated [2][3]6,24]. Most of the expansion values in Fig.…”

Section: Resultsmentioning

confidence: 78%

“…Thus, hydraulic composite binders based on reactive anhydrite [1][2][3][4][5] or hemihydrate [6][7][8][9][10], can be considered as cements that lead to the formation of a gypsum framework interacting with water insoluble hydrated phases of the type C-S-H and ettringite formed from the reactions of the ''supplementary cementitious materials'', such as granulated blast-furnace slag (GGBFS), Portland cement, sulphoaluminate clinker or pozzolanic materials. On the other hand, other composites could be elaborated with calcium sulfate dihydrate, http where the main role of calcium sulphate is to perform as a buffer of sulphatic activator for the supplementary cementitious materials, rather than as a reactive material to form gypsum [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hemihydrate or waste anhydrite in composite binders with blast-furnace slag: Hydration products, microstructures and dimensional stability

Magallanes-Rivera¹,

Escalante-Garcı́a²

2014

Construction and Building Materials

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Hemihydrate or waste anhydrite in composite binders with blast-furnace slag: Hydration products, microstructures and dimensional stability

Magallanes-Rivera¹,

Escalante-Garcı́a²

2014

Construction and Building Materials

Self Cite

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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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“…[3][4][5][6] New composites based on gypsum matrix and mineral additives have been prepared in the research. [4][5][6][7][8][9][10][11][12][13] However, with the improvement of the demand of building thermal environment, a gypsum plaster with an efficient thermal insulation function needed to be prepared. At present, there is little literature related to the preparation of thermal insulation gypsum plaster (TIGP).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Thermal Insulation Plaster with FGD Gypsum

et al. 2016

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Thermal insulation gypsum plaster was prepared from flue gas desulphurization (FGD) gypsum. K12 is more recommendable as foaming agent, when the mass fraction of K12 is around 0.1 %, the setting time and compressive strength meet the requirements of gypsum-based construction materials. In the meanwhile, the thermal conductivity is 0.18 W m −1 K −1 , which can be used as a thermal insulation material. The hemihydrate mixtures obtained, allow the design of a new wall structure, which is more efficient as a thermal insulation system. The wall heat transfer coefficient test was carried out to compare thermal performance of two different thermal insulation systems. Compared with the thermal performance of a conventional system, the heat transfer coefficient of the new system was reduced by 5.6 %. Finally, energy-saving analysis of a building was carried out to compare the energy-saving effect of the conventional and new systems of building. The energy-savings of the building with the new system increased by almost 2 %, thus resulting in low energy consumption of the building.

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Modified gypsum compounds: An ecological–economical choice to improve traditional plasters

Cited by 62 publications

References 16 publications

Hemihydrate or waste anhydrite in composite binders with blast-furnace slag: Hydration products, microstructures and dimensional stability

Hemihydrate or waste anhydrite in composite binders with blast-furnace slag: Hydration products, microstructures and dimensional stability

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

Preparation of Thermal Insulation Plaster with FGD Gypsum

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