Escayola aligerada con sólidos celulares

Merino, Mercedes del Río; Domínguez, J. D.; Olivares, Francisco Hernández

doi:10.3989/ic.1998.v50.i458.878

Cited by 15 publications

(4 citation statements)

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“…After World War II, the changes produced in the characteristics of gypsum begin to be scientifically studied, by using additives and admixtures [6]. In the case of lightened gypsums expanded perlite and exfoliated vermiculite additions are studied [7,8].…”

Section: Review On Lightenedmentioning

confidence: 99%

Analysis of the Relationship between Density and Mechanical Strength of Lightened Gypsums: Proposal for a Coefficient of Lightening

Astorqui

Merino

Sáez

et al. 2017

Advances in Materials Science and Engineering

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This article develops a relationship between the reduction of density in lightened gypsum and the addition of expanded and/or extruded polystyrene waste from the construction sector and their mechanical behavior. The equations determined in this study allow us to know the flexural and compressive strengths of a lightened gypsum/plaster compound once its density is known. The results show that there is an exponential relationship between the density of the compound and its strength. The methodology followed included a compilation of the results obtained in previous research works on lightweight gypsums, analyzing the relationship between density and mechanical strength and comparing them with the equations developed in this research. The results obtained by previous researchers have a good adjustment with the proposed models, and only perlite compounds present greater deviations in the compressive strength analysis. Also, a dimensionless lightening coefficient is defined which can help to determine the best application for a lightweight gypsum compound, comparing it with an ideal lightweight gypsum.

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Section: Review On Lightenedmentioning

confidence: 99%

Analysis of the Relationship between Density and Mechanical Strength of Lightened Gypsums: Proposal for a Coefficient of Lightening

Astorqui

Merino

Sáez

et al. 2017

Advances in Materials Science and Engineering

Self Cite

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“…The gypsum plasters made with waste were coded as C1 and C2 and prepared with 14.50% and 46.60% by weight respectively of tire rubber (Table 2). The used percentages were chosen to achieve powdered densities around 0.800 g/cm 3 and 0.600 g/cm 3 to simulate low or very low density plasters. The samples were compared with control plasters (M0 samples), in which powdered density was 0.942 g/cm 3 .…”

Section: Physical Properties: Shore C Hardness Flexural and Compressi...mentioning

confidence: 99%

“…Among these additions are phase change materials (1), expanded clay, perlite, vermiculite and expanded polystyrene (2,3). These materials can be incorporated into binding mixtures like mortars, renders and plasters.…”

Section: Introductionmentioning

confidence: 99%

Influence of tire rubber waste on the fire behavior of gypsum coatings of construction and structural elements

2022

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The addition of inorganic expanded aggregates, such as perlite or vermiculite is well known in gypsum plasters. However, the reuse of organic wastes in coatings like plasters and renders has been poorly studied. This paper shows the effect of tire rubber wastes on the mechanical properties and fire performance of gypsum plasters. The rubber waste was added to the mixture in mass percentages of 14.50% (C1) and 46.60% (C2). Flexural and compressive strength of plasters made with rubber wastes was visibly reduced as well as their surface hardness (Shore C). In addition, fire tests produced major damages through the entire 2 cm thickness of samples containing rubber wastes, as it was corroborated by X ray diffraction (XRD) and Thermogravimetric (TG) analysis. The heat transfer due to fire exposure modified considerably the chemical composition of plasters, since, on the non-exposed face to fire, the amount of gypsum (CaSO4·2H2O) equivalent to mass loss obtained by TG due to water released by these plasters made with rubber wastes, was 5.4-7.2 lower than that of conventional plasters. The results suggest that certain wastes may reduce the efficiency of gypsum plasters in protecting underneath construction and structural elements against fire.

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“…In relation to works focused on decreasing the weight of the prefabricated plaster, several studies analyzed gypsum matrix batches with various lightening additives used in mortar and cement or concrete (air-entraining agents, foaming agents, plasticizers and superplasticizers) (6), by adding crushed cork aggregates (7,8), blending into the gypsum matrix expanded polystyrene beads (9, 10), or incorporating cellular solids (expanded perlite, vermiculite, cellular glass) (11).…”

Section: Introductionmentioning

confidence: 99%

Characterization mixtures of thick gypsum with addition of treated waste from laminated plasterboards

2014

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Environmental protection involves the reuse of construction and demolition waste. In order to improve recycling, waste from laminated plasterboards is used in the cement and laminated gypsum boards manufacture. This article analyzes the use of ground and burnt laminated plasterboard (BLG) waste mixed with thick gypsum (TG). Physical-mechanical characterization of superficial hardness and mechanical strength has been performed on different batches of plaster powder materials with different BLG waste particle sizes to determine its suitability. Coarse particle sizes were preferred in order to reduce the waste treatment. From all the mixtures studied, the one with the best results was TG + 5% BLG 1.25 which forms a material of higher superficial hardness and strength. The results obtained in the study have proved suitable products for building use (both as renders and as prefabricated elements) enabling for a reduction in the consumption of natural resources.

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Escayola aligerada con sólidos celulares

Cited by 15 publications

References 0 publications

Analysis of the Relationship between Density and Mechanical Strength of Lightened Gypsums: Proposal for a Coefficient of Lightening

Analysis of the Relationship between Density and Mechanical Strength of Lightened Gypsums: Proposal for a Coefficient of Lightening

Influence of tire rubber waste on the fire behavior of gypsum coatings of construction and structural elements

Characterization mixtures of thick gypsum with addition of treated waste from laminated plasterboards

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