Improvement of the mechanical properties of set plasters by means of four organic additives inducing {01}faces

Amathieu, L.

doi:10.1016/0022-0248(86)90432-x

Cited by 53 publications

(39 citation statements)

References 15 publications

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“…13,16 The crystalline habits and the arrangement of the crystals influence the hardness of the gypsum, as explained by Amathieu (1986). 20 The hardness of the gypsum increases by a factor of two to three with reducing the crystal size from micrometer to nanometer scale level. This increase is attributed to the strong entanglement of the gypsum needle-like network.…”

Section: Introductionmentioning

confidence: 99%

Characterization and mechanical properties investigation of the cellulose/gypsum composite

Nindiyasari

Griesshaber

Zimmermann

et al. 2015

Journal of Composite Materials

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We synthesized cellulose/gypsum composites in the presence and absence of sodium alginate and investigated the interaction between the composite components as well as the mechanical properties of the final composites. Four different types of cellulose fiber materials were used: cellulose UFC100, cellulose B400, nanofibrillated cellulose, and Lyocell fiber. For all investigated composites the total amount of admixed cellulose was between 1 and 2 wt%, the amount of admixed sodium alginate was 0.5 wt%. We determined the morphology of the composites and observed that the particle and fiber dimensions of the admixed cellulose affect the mode of gypsum-gypsum interlocking and the total porosity of the composites. This in turn had a substantial influence on the mechanical properties of the final composite materials. The addition of sodium alginate resulted in an increase of ultimate strain values. Composites with Lyocell fiber, a synthetic fiber, also had a high Young's modulus.

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Section: Introductionmentioning

confidence: 99%

Characterization and mechanical properties investigation of the cellulose/gypsum composite

Nindiyasari

Griesshaber

Zimmermann

et al. 2015

Journal of Composite Materials

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“…Attempts have been recently made to define the general principles governing such interactions and to use this knowledge to propose additives with specific influences on the crystallization processes of interest [31,32]. As part of such endeavours, scientists have been trying to understand biological mineralization processes, in with organic macromolecules and/or molecular assemblies are used to control both size and shape of inorganic crystals [32,33].…”

Section: Introductionmentioning

confidence: 99%

Growth morphology of gypsum in the presence of copolymers

Montagnino

Costa

Massaro

et al. 2011

Cryst. Res. Technol.

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Gypsum is the most abundant natural sulphate, and in industrial application it plays an important role in gypsum based binders. Furthermore, it plays a critical role in the hydration of Portland cement, and then gypsum is one of the most important cement additive. In this paper we investigated the role of two commercial polymeric additives in modifying the crystal habits and size of gypsum, growth in aqueous solution. These two additives belong to the categories of acrylic polymers and they are known only by their commercial names of SP1 and SP3. We found that these substances can act as shape modifiers mainly at concentration over 0.04% by weight, with a shortening in the elongation of gypsum crystal and some change in the characters of {001} form, from stepped to flat, due to a change in the growth mechanism

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“…The faces of the crystals involved in these interactions are not the same from one crystal morphology to another. For example, for needle-shaped crystals, the faces involved are mainly (010), (120) and (1 11) in contrast to tabular crystals (grown in the presence of diethylene triamine pentaacetic acid) in which the faces involved are mainly (010), (120) and (1 01) (2). Therefore, as the relative proportions of the different faces are known, it is important to obtain information about adsorbed water to assess its role in these interactions.…”

Section: Introductionmentioning

confidence: 99%

Study of Gypsum Dehydration by Controlled Transformation Rate Thermal Analysis (CRTA)

Badens

Llewellyn

Fulconis

et al. 1998

Journal of Solid State Chemistry

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Improvement of the mechanical properties of set plasters by means of four organic additives inducing {01}faces

Cited by 53 publications

References 15 publications

Characterization and mechanical properties investigation of the cellulose/gypsum composite

Characterization and mechanical properties investigation of the cellulose/gypsum composite

Growth morphology of gypsum in the presence of copolymers

Study of Gypsum Dehydration by Controlled Transformation Rate Thermal Analysis (CRTA)

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