Experimental analysis of toughness and modulus of rupture increase of sisal short fiber reinforced hemihydrated gypsum

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Abstract

This paper presents an experimental analysis of the mechanical properties of gypsum reinforced with small volume fractions of sisal short fibers randomly mixed with the matrix. The modulus of rupture and toughness dependence on both fiber length and fiber volume fraction are discussed jointly with the fiber critical length parameter. The micromechanisms of fiber debonding and fiber pull-out are related to composite toughness increase.

References (3)

  • Z. Fördös

    Natural or modified cellulose fibres as reinforcement in cement composites. Natural fibre reinforced cement and concrete

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    It has the advantages of low energy consumption, high costs performance, good fire resistance, and efficient thermal and sound insulation, and is recycled in a proper preparation process [3–6]. However, because of its low water resistance [7,8] and fragile nature [9–12], the usage of gypsum was limited. To solve the problem of performance degradation of gypsum in a humid environment, admixtures such as cement [13–15], fly ash [16,17], lime [18–20], and slag [13,21] are added to gypsum powder, improving the strength of the gypsum matrix.

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