Properties of nanofibre reinforced cement composites

Onuaguluchi, Obinna; Panesar, Daman K.; Sain, Mohini

doi:10.1016/j.conbuildmat.2014.04.072

Cited by 122 publications

(73 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cross polarization/magic angle spinning (CP/MAS) 13 C solid state NMR experiments were performed with Bruker 300 spectrometer operating at a 13 C frequency of 75 MHz. the contact time for CP was 1ms and the delay time for acquisitions was 5 s. Chemical shifts were referred to tetramethylsilane (TMS).…”

Section: Cp/mas 13c Solid State Nmrmentioning

confidence: 99%

“…Recently, few studies have worked on the dispersion and stability of cellulose nanofiber as reinforcing materials in a [13][14][15] cement matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Onuaguluchi et al [13] have noticed that the addition of a small amount of the order of 1% up to 5% by weight of cellulose nanofibers improves the bending strength up to 100% and the absorption energy of the cement paste up to 150%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization and Influence of Nanofiber Flours of Wood Modified on Fresh State Properties of Cement Based Mortars

Aloulou¹,

Alila²

2019

Journal of Renewable Materials

View full text Add to dashboard Cite

Nanofibrillated wood fiber was used as fillers in the partial cement matrix replacing the cement to a content of up to 2% by weight of cement. The nanofibrillated effect of wood fibers on porosity, thermal properties and compressive strength was studied. The results obtained showed an improvement in compressive strength of more than 40% with 1% by weight of wood fiber nanofibrillate. The addition of nanofibrillated wood fiber shows a good pore reduction, and the best result was obtained with emulsion of a mixture incorporating 1% by weight of wood fiber nanofibrillate in the presence of an anionic surfactant (SDBS). Thermal conductivity measurements and thermal expansion coefficient, compared to nanofibrillated wood fiber reinforced cement pastes, showed the reinforcing efficiency of cellulose fiber nanofibrillate. The degree of hydration of the cement increased with nanofibrillated wood fibers. This property has been confirmed by Fourier transform infrared spectroscopy. These analyzes revealed that the presence of nanofibrillated wood fibers generates and promotes the hydration of the cement, producing more portlandite and calcium silicate gel, which influences the compressive strength which gives a strong improvement.

show abstract

Section: Cp/mas 13c Solid State Nmrmentioning

confidence: 99%

“…Recently, few studies have worked on the dispersion and stability of cellulose nanofiber as reinforcing materials in a [13][14][15] cement matrix.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization and Influence of Nanofiber Flours of Wood Modified on Fresh State Properties of Cement Based Mortars

Aloulou¹,

Alila²

2019

Journal of Renewable Materials

View full text Add to dashboard Cite

show abstract

“…Shimazaki and all have shown that the reinforcement of conventional epoxy resin with cellulose nanofibers improves the thermal conductivity from 300% to 500%, which generates a storage capacity of 140% [11]. Recently, few studies have worked on the dispersion and stability of cellulose nanofiber as reinforcing materials in a [12][13][14][15] cement matrix. Onuaguluchi et al [13] have noticed that the addition of a small amount of the order of 1% up to 5% by weight of cellulose nanofibers improves the bending strength up to 100% and the absorption energy of the cement paste up to 150%.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, few studies have worked on the dispersion and stability of cellulose nanofiber as reinforcing materials in a [12][13][14][15] cement matrix. Onuaguluchi et al [13] have noticed that the addition of a small amount of the order of 1% up to 5% by weight of cellulose nanofibers improves the bending strength up to 100% and the absorption energy of the cement paste up to 150%. Other works Cao et al [14] have shown that the addition of cellulose nanocrystals (CNC) modify the stress on the strength of the mortar based on cement paste, more specifically a strong improvement in the resistance to bending of cement, this increase is attributed to the increase in the degree of hydration of the cement pastes with the cellulose nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

Stabilization and Evaluation of Modified Nanofiber Flour Wood on the Properties of Cement-Baszd Mortar

Aloulou¹,

Sammouda²

2019

Journal of Renewable Materials

View full text Add to dashboard Cite

The influence of nanofiberwood on the properties of the fresh condition of cement based mortars is not known in detail, despite recent advances in nanocellulose technology and it is related composite materials. Nanofiber wood from industrial waste, produced by high-pressure homogenization, was used as cement partial replacement for cement paste at a content ranging from 0% to 2% by weight of cement. The effect of the nanofiber wood content on the porosity, the compressive strength and the degree of hydration of the cement was investigated. Results have shown an improvement in the compressive strength by more than 50% with 1% of added fiber wood. The chemical modification of nanofibers wood by grafting of chains alkyls in their surfaces can reduce the quantity of water absorbed by the sample. The addition of an anionic additive (SDBS) in the water of mixing improves of more the surface of samples by minimizing the size of pores by emulsion effect, from where the absorption of water reduces. The degree of hydration of the cement has increased with the cellulose content containing nanofibrils. The analyze revealed that the presence of nanofiber wood favored the hydration of the cement by producing more calcium silicate gel and portlandite, probably the main reason for this improvement in compressive strength.

show abstract

Rheological Aspects of Cellulose Nanomaterials: Governing Factors and Emerging Applications

et al. 2021

View full text Add to dashboard Cite

of nanomaterials from green, low-cost, abundant, renewable, and biodegradable natural resources. One such attractive bioresource is cellulose, the most abundant biopolymer on earth, which is widely present in various forms of renewable biomass, such as trees, plants, tunicates, and bacteria.Structurally, cellulose is a linear, high molecular weight polysaccharide with repeating glucose units linked by 1-4 glycosidic bonds. Owing to the presence of hydroxyl groups, those linear chains of glucose units link together through van der Waals forces and intermolecular hydrogen bonding to form elementary fibrils, which are further packed into larger aggregates known as microfibrils. [3] Cellulose fibrils consist of disordered (amorphous) regions and highly ordered (crystalline) regions. In the crystalline regions, cellulose chains are closely packed together in highly ordered fashion (parallel to the direction of fibril length), dictated by the intricate intraand intermolecular hydrogen bonding; whereas in the amorphous regions, cellulose chain stacking is less ordered and not as closely packed. Therefore, the amorphous regions are more vulnerable to both physical disintegration and chemical hydrolysis in comparison with crystalline regions. When cellulose is prepared in nano-scale fibrillar or crystalline forms, it is broadly referred to as cellulose nanomaterials (CNMs).The isolation, characterization, modification, and application of CNMs are currently receiving much attention. Understanding Cellulose nanomaterials (CNMs), mainly including nanofibrillated cellulose (NFC) and cellulose nanocrystals (CNCs), have attained enormous interest due to their sustainability, biodegradability, biocompatibility, nanoscale dimensions, large surface area, facile modification of surface chemistry, as well as unique optical, mechanical, and rheological performance. One of the most fascinating properties of CNMs is their aqueous suspension rheology, i.e., CNMs helping create viscous suspensions with the formation of percolation networks and chemical interactions (e.g., van der Waals forces, hydrogen bonding, electrostatic attraction/repulsion, and hydrophobic attraction). Under continuous shearing, CNMs in an aqueous suspension can align along the flow direction, producing shear-thinning behavior. At rest, CNM suspensions regain some of their initial structure immediately, allowing rapid recovery of rheological properties. These unique flow features enable CNMs to serve as rheological modifiers in a wide range of fluid-based applications. Herein, the dependence of the rheology of CNM suspensions on test protocols, CNM inherent properties, suspension environments, and postprocessing is systematically described. A critical overview of the recent progress on fluid applications of CNMs as rheology modifiers in some emerging industrial sectors is presented as well. Future perspectives in the field are outlined to guide further research and development in using CNMs as the next generation rheological modifiers.

show abstract

Properties of nanofibre reinforced cement composites

Cited by 122 publications

References 20 publications

Characterization and Influence of Nanofiber Flours of Wood Modified on Fresh State Properties of Cement Based Mortars

Characterization and Influence of Nanofiber Flours of Wood Modified on Fresh State Properties of Cement Based Mortars

Stabilization and Evaluation of Modified Nanofiber Flour Wood on the Properties of Cement-Baszd Mortar

Rheological Aspects of Cellulose Nanomaterials: Governing Factors and Emerging Applications

Contact Info

Product

Resources

About