Multi-technique investigation regarding the impact of cellulose nanofibers on ultra-high-performance concrete at the macroscopic and microscopic levels

Xuan, Mei-Yu; Wang, Xiaoyong

doi:10.1016/j.conbuildmat.2022.126936

Cited by 12 publications

(3 citation statements)

References 58 publications

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“…The compressive strength of the samples with WNP increased because the water–binder ratio decreased as WNP absorbed water during mixing. In addition, the hydration product adhered to the rough cellulose surface and increased the density of the internal structure [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…This may be attributed to the fact that initial hydration was delayed due to the high water absorption of WNP and the increase in micropores [ 16 , 31 ]. In addition, the tendency to increase strength may be attributed to the release of absorbed moisture, which thus promotes hydration; hydration products may form on the cellulose surface to fill pores, resulting in a dense structure [ 30 , 32 ]. However, when the amount of WNP used increases, some strength may be lost due to the fiber ball phenomenon of WNP, which is similar to fiber [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

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Mechanical Properties of Cement Mortar Containing Ground Waste Newspaper as Cementitious Material

et al. 2023

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In recent years, several studies have reported the recycling of by-products generated by the paper industry and their application to the construction industry. A majority of the existing studies used waste paper sludge ash, and considerable energy is consumed in such incineration processes. This may further contribute to air pollution. In this study, we used waste newspaper (WNP), which underwent a simple crushing process without a separate high-temperature treatment process, and we integrated it in cement mortar. We prepared mortars containing 0%, 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% ground WNP as a cement substitute. Subsequently, the fluidity, compressive strength, tensile strength, carbonation depth, drying shrinkage, and microstructure of the mortars were compared and analyzed. The 28-day compressive strength of the mortar samples with WNP was approximately 3.2–16.1% higher than that of the control sample. The 28-day accelerated carbonation depth of the samples with WNP was approximately 1.03–1.61 mm. Furthermore, their carbonation resistance was approximately 5.2–39.4% higher than that of the control sample. Compressive strength, tensile strength, and carbonation resistance were improved by appropriately using ground WNP as a cement substitute in cement mortar. In this study, the appropriate amount of WNP according to the mechanical properties of cement mortar was found to be 0.4–0.8%, and considering the durability characteristics, the value 0.6 was the most ideal.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mechanical Properties of Cement Mortar Containing Ground Waste Newspaper as Cementitious Material

et al. 2023

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“…Weight loss curves from TGA scans in Fig. 7 revealed differences in calcium hydroxide (CH) decomposition between 400 and 450°C 95 , 96 . The control paste exhibited a 6.1% loss, while mixes with nano-clay, nano-cellulose, and their hybrid showed 7.8%, 10.14%, and 4.6% reductions, respectively.…”

Section: Resultsmentioning

confidence: 99%

Utilizing industrial byproducts for the manufacture of clay-cellulose nanocomposite cements with enhanced sustainability

El-Feky,

Badawy,

Youssef

et al. 2024

Sci Rep

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This study investigates the influence of different nano clay contents (0, 1, 3, and 5 wt% of cement) on the microstructure and the mechanical properties of cement composites reinforced with varying Nano cellulose fiber contents (0, 0.5, 0.75, and 1 wt% of cement). Unlike previous research that employed sonication to improve dispersion in the cement matrix, this study explores the effects of unsonicated nano-cellulose addition and the combined incorporation of nano-cellulose and nano-clay. The results demonstrate that these additions significantly enhance the compressive strength, abrasion resistance, and water absorption ratios of the cement composites. Furthermore, the inclusion of nano-clay improves the microstructure of the cement matrix, strengthening the interfacial transition zone and reinforcing the bond between nano-cellulose and the cement matrix. The microstructural analysis using scanning electron microscopy (SEM) reveals the presence of a dense interconnected structure characterized by rod-like crystals. This research contributes to the development of sustainable construction materials by examining the effects of nano-cellulose and nano-clay on the properties and microstructure of cement composites. The utilization of industrial byproducts, such as wood sawdust, for the extraction of nano-cellulose offers an eco-friendly approach to enhance the performance of cement-based materials. The maximum compressive strength obtained, after 28 days, was at mix with 0.75% NCL + 5%NC with a gain of 53.5% than that of the control mix. In mixes containing only nano-clay (NCL), the increase in NCL content led to a higher rate of water absorption in the cement matrix, which reaches 4%. Confirming the results obtained from compressive strength and water absorption, mix with 0.75% NCL and 5% NC had obtained the optimum values with an improvement of 20% than that of the control mix.

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Mechanical Properties, Density, and Morphology Analysis of Strong and Lightweight Microfibril Cellulose Reinforced Epoxy/Micro Balloon Hybrid Composites

Wijaya,

Ardhyananta,

Hidayat

et al. 2024

J. Inst. Eng. India Ser. D

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Multi-technique investigation regarding the impact of cellulose nanofibers on ultra-high-performance concrete at the macroscopic and microscopic levels

Cited by 12 publications

References 58 publications

Mechanical Properties of Cement Mortar Containing Ground Waste Newspaper as Cementitious Material

Mechanical Properties of Cement Mortar Containing Ground Waste Newspaper as Cementitious Material

Utilizing industrial byproducts for the manufacture of clay-cellulose nanocomposite cements with enhanced sustainability

Mechanical Properties, Density, and Morphology Analysis of Strong and Lightweight Microfibril Cellulose Reinforced Epoxy/Micro Balloon Hybrid Composites

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