Study of the effect of silica fume and latex dosages in cementitious composites reinforced with cellulose fibers

Machado, Paulo Júnior Carvalho; Ferreira, Rondinele Alberto dos Reis; Motta, Leila Aparecida de Castro

doi:10.1016/j.jobe.2020.101442

Cited by 9 publications

(12 citation statements)

References 49 publications

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“…The most commonly used SCMs include; MK, SF, GBFS and FA [88]. Several researchers have used these materials within research of composite designs due to the improved mechanical properties [38,78,85]. For example, Machado et al [78] has shown the presence of SF can create a greater amount of hydrated calcium silicate, which aids in the strength of the composite as well as increases the service life when exposed to weathering.…”

Section: Original Fibresmentioning

confidence: 99%

“…Several researchers have used these materials within research of composite designs due to the improved mechanical properties [38,78,85]. For example, Machado et al [78] has shown the presence of SF can create a greater amount of hydrated calcium silicate, which aids in the strength of the composite as well as increases the service life when exposed to weathering. However, the researchers noted that when excessive amounts of SF (17.1%) and high values of cellulose fibre (13.5%) are integrated, the porosity of the composite also increases.…”

Section: Original Fibresmentioning

confidence: 99%

“…SF can act as a filler and reduce the porosity of a composite, minimising voids that contain air and moisture [77]. However, the measurement of the materials integration is critical, as excessive amounts can enhance water absorption and reduce durability [78]. Moreover, Machado et al showed when 10% SF and 10% fibre was integrated, the modulus of rupture (MOR) and modulus of elasticity (MOE) had maximum values at both 28 and 180 days.…”

Section: Original Fibresmentioning

confidence: 99%

See 2 more Smart Citations

A review of the mechanical and durability performance of kraft-fibre reinforced mortar and concrete

Haigh

Sandanayake

Bouras

et al. 2021

Construction and Building Materials

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Section: Original Fibresmentioning

confidence: 99%

Section: Original Fibresmentioning

confidence: 99%

Section: Original Fibresmentioning

confidence: 99%

See 1 more Smart Citation

A review of the mechanical and durability performance of kraft-fibre reinforced mortar and concrete

Haigh

Sandanayake

Bouras

et al. 2021

Construction and Building Materials

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“…As discussed above, immersion of the vegetable fibers in silica fume slurry can be regarded as an effective means to slow down the embrittlement behavior of the composites. During immersion, the capillary pores of the fiber are filled with silica fume microparticles causing the elimination of the alkaline calcium hydroxide and promoting the formation of C-S-H gels [90]. us, composites reinforced with surface-modified natural fibers in silica fume have shown improved durability.…”

Section: Adding Pozzolanic Compounds Many Researchersmentioning

confidence: 99%

Degradation Kinetics and Durability Enhancement Strategies of Cellulosic Fiber-Reinforced Geopolymers and Cement Composites

Addis

Sendekie

Satheesh

2022

Advances in Materials Science and Engineering

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The need to overcome the low energy-absorbing response and low tensile strength of geopolymers and cementitious materials has motivated researchers to develop fiber-reinforced composites. Interestingly, natural cellulosic fibers provide exciting prospects for advancements in bio-based materials compared to synthetic fibers. Incorporating fibers in such binders offer a crack limiting effect by creating multiple cracks than forming one major crack, usually leading to improved toughness and tensile strength of the composites. However, their sensitivity in alkaline media and environmental fluctuations deteriorates their durability and reinforcing capacity in composites. Therefore, exploring suitable mitigation strategies for such drawbacks of natural fibers based on previous research work and figuring out the existing gaps for further developments is extremely important. In this paper, cellulosic fiber degradation in geopolymer and cement-based matrices and the respective remedial actions have been reviewed based on a comprehensive analysis of the available literature. The influence of fiber modification and matrix treatment on the durability and strength characteristics of such composites is thoroughly discussed. Finally, recommendations and suggestions for further research in the field are presented.

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“…In hot regions, eucalyptus is a fast-growing hardwood species with outstanding fiber qualities and comparatively cheap market cost. Eucalyptus pulp has been widely used in the paper industry all over the world; however, there is very limited information available in the literature about its use as a filling material in RCC [19][20][21][22][23]. Another alternative is Basalt fiber, a natural mineral material that is acquired from volcanic rocks.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanical Properties of Eucalyptus-Basalt-Based Hybrid-Reinforced Cement Composites

2020

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The present study describes the manufacturing of flat sheets of eucalyptus-basalt based hybrid reinforced cement composites (EB-HRCC). The potential of basalt fibrous waste (BFW) as a reinforcement agent in cement matrices and its effects on mechanical and interfacial properties were evaluated in detail. Significantly enhanced bending (flexural) strength and ductility were observed for all developed composite samples. BFW and eucalyptus pulp (EP) were utilized as reinforcement and filling agents respectively for EB-HRCC samples. Mechanical, microstructural and physical properties of EB-HRCC samples were investigated with different formulations of BFW with EP in cement matrices. The results showed that physical properties of the composite samples were more influenced by fiber content. For standard mechanical analysis, the composite samples were placed in sealed bags for two days, thermally cured at 60 °C for five days and immersed in water in ambient conditions for one day. The obtained results showed that samples prepared under optimized conditions (4% EP and 2% BFW) had significantly higher flexural strength and bulk density with lower water absorption and apparent void volume (porosity). Moreover, the higher percentage of BFW significantly enhanced the values of modulus of rupture (MOR), modulus of elasticity (MOE), specific energy (SE) and limit of proportionality (LOP). The effects of entrapped air under the four-point bending test on the mechanical behavior of hybrid composites were also investigated in this thematic study. The composites were designed to be used as roofing tile alternatives.

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Study of the effect of silica fume and latex dosages in cementitious composites reinforced with cellulose fibers

Cited by 9 publications

References 49 publications

A review of the mechanical and durability performance of kraft-fibre reinforced mortar and concrete

A review of the mechanical and durability performance of kraft-fibre reinforced mortar and concrete

Degradation Kinetics and Durability Enhancement Strategies of Cellulosic Fiber-Reinforced Geopolymers and Cement Composites

Enhanced Mechanical Properties of Eucalyptus-Basalt-Based Hybrid-Reinforced Cement Composites

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