Alkali resistance of selected waste fibres to model cement environment

Mrduljaš, Branka; Baričević, Ana; Pucić, Irina; Carević, Ivana; Didulica, Katarina

doi:10.1016/j.cscm.2023.e02411

Cited by 1 publication

(1 citation statement)

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“…Inadequate inter-adhesion within the fibers and matrix can result in inadequate bridging of the fibers, which plays a critical role in controlling crack development [10]. In addition, the durability of the fiber, resistance to environmental effects, and especially the alkaline environment resistance in cement-based composites is crucial [11]. The polymer structure of the fiber, the duration of exposure to an alkaline environment, and the alkaline concentration are important parameters that influence the alkaline resistance of the fiber [12].…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on the mechanical properties of woven fabric-reinforced calcined diatomite substituted cement-based composites

Bozkurt,

Türkel,

Felekoğlu

et al. 2024

Mater. Res. Express

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The mechanical characteristics of polyester and flax woven fabric-reinforced, diatomite-substituted, cement-based composites have been examined at different ages within the scope of this study. The use of calcined diatomite in combination with a cement-based matrix aims to improve the mechanical performance within the composite as well as reduce carbon emissions. The consistency of cement-based and diatomite-substituted matrices with water-to-binder proportions of 0.28 and 0.45 was maintained at a fixed flow diameter of 235 mm with the adjusted use of a superplasticizer. The stress-strain graphs of the composites were obtained using an axial tensile testing machine and Linear Variable Differential Transformers (LVDT). The tensile strength, ductility, toughness development, and multi-crack performance of WFRC were obtained as a function of fabric type and aging. The effects of aging on tensile properties are discussed separately for each fabric type. Polyester woven fabric-reinforced composites were found to be superior to flax WFRC in terms of several mechanical properties at all ages. The substitution of diatomite further improved the tensile performance of the polyester woven fabric-reinforced composites. The fabric-matrix interface densification role of diatomite was determined by SEM/EDS line analysis. Evidence of a pozzolanic reaction between portlandite and diatomite was obtained through microstructure studies. Carbon emission analysis revealed that equivalent CO2 emissions could be reduced using diatomite in woven fabric reinforced composites. However, diatomite substitution caused a cost increasing effect

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Section: Introductionmentioning

confidence: 99%