Durability properties of engineered pulp fibre reinforced concretes made with and without supplementary cementitious materials

Booya, Emad; Gorospe, Karla; Ghaednia, Hossein; Das, Sreekanta

doi:10.1016/j.compositesb.2019.05.070

Cited by 35 publications

(15 citation statements)

References 26 publications

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“…Another issue with MK is that fibres may not necessarily anchor themselves within the matrix when MK is present, leaving the matrix more susceptible to fibre pull-out in these composite designs. Studies using MK and natural fibres detail similar findings [27][28][29]. This research indicates that MK can reduce chloride ion penetration, which can enhance the durability of the materials.…”

Section: Introductionsupporting

confidence: 75%

The Thermo-Phase Change Reactivity of Textile and Cardboard Fibres in Varied Concrete Composites

Haigh,

Sandanayake,

Joseph

et al. 2024

Sustainability

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The building and construction industry heavily relies on the use of concrete and cementitious composites due to their exceptional attributes, including strength and durability. However, the extensive use of these materials has led to significant environmental challenges, including resource depletion, carbon emissions, and waste accumulation. In response to these challenges, recent advancements in fibre cementitious composites have shown promise in mitigating these detrimental effects. The integration of waste materials to supplement manufactured fibres represents a promising development in reinforced concrete composite materials. Waste materials like textiles and cardboard are emerging as potential fibre supplements in cementitious composites. While these materials have primarily been investigated for their mechanical characteristics, understanding their thermal properties when applied in construction materials is equally crucial. Incorporating fibres within composite designs often requires matrix modification to reduce degradation and enhance fibre longevity. This study aims to investigate the thermo-phase change properties of both textile and cardboard fibres within varied concrete matrices. Additive materials offer a range of advantages and challenges when used in composite materials, with additional complexities arising when incorporating fibre materials. Understanding the thermal reactivity of these materials is crucial for optimizing their application in construction. This study demonstrates the potential of waste fibres used with gypsum, metakaolin, and silica fume as matrix modifiers in concrete. This research provides valuable insights for future studies to explore specific material combinations and investigate complex fire testing methods, ultimately contributing to the development of sustainable construction materials.

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Section: Introductionsupporting

confidence: 75%

The Thermo-Phase Change Reactivity of Textile and Cardboard Fibres in Varied Concrete Composites

Haigh,

Sandanayake,

Joseph

et al. 2024

Sustainability

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“…The fiber composite reinforced with natural fiber is omnipresent in commercial and residential buildings, which has gained prominence over the last few decades as it can offset the total embodied carbon in the buildings’ structure. , Fiber reinforcement is typically kept <8 wt %, as a higher content of fiber has negative ramifications on the physicochemical properties: poor workability and mechanical strengtha “conundrum” in materials engineering because the strength requirement of the composite and a low carbon-dioxide footprint are equally important to achieve sustainable development goals. − Because forests serve as the carbon sink, wood-derived pulp fibers can reduce the carbon footprint of cementitious products destined for buildings . Note that pristine (unmodified) wood species will always have the biggest impact on reducing the CO 2 footprint of building materials.…”

Section: Introductionmentioning

confidence: 99%

On the Roles of Cellulose Nanocrystals in Fiber Cement: Implications for Rheology, Hydration Kinetics, and Mechanical Properties

Raghunath

Hoque

Foster

2023

ACS Sustainable Chem. Eng.

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Fiber cement reinforced with pulp fibers is one of the key drivers for the decarbonization of nonstructural building materials, where the inclusion of sustainable pulp fibers at high proportions (i.e., > 8 wt %) renders poor workability of fibercement slurry with a concomitant loss in mechanical strength. Petrochemical-derived superplasticizers, i.e., polycarboxylates (PCEs), are predominantly used in fiber cement (including cement mortars) because they dramatically improve (content <0.5 wt %) the slurry rheology but reduce the rate of hydration and weaken the strength of the cured composite. Thus, it is crucial to explore renewable and bio-based superplasticizers devoid of any negative traits (if possible) of the conventional PCEs. In this study, we examined wood-derived cellulose nanocrystals (CNCs) as a multifunctional additive in fiber cement (bleached pulp fiber content: 8 wt %). In fiber cement, variation of the content (0.02−4 wt %) of CNCs resulted in improvement in the shear thinning behavior of the fiber-cement slurry and thereafter increased the hydration kinetics at high CNC contents (2−4 wt %). Notably, the flexural strength of the composite also exhibited improvement upon the addition of CNCs; the maximum strength was observed at 4 wt % of CNCs. Overall, the beneficial roles of CNCs afforded >10 wt % (in-total) bio-based content in fiber cement without compromising the mechanical strength and curing time (compared to PCEs); hence, the findings of this study could unravel new avenues in interface engineering of cement composites leveraging the multifunctional features of biomaterials, thus enhancing sustainability.

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“…Natural fibres are animal-based, mineral-derived, and plant-based fibres. Most common plant fibres like ramie, cotton, kenaf, flax, sisal, hemp, jute, bamboo, abaca, sugar palm, etc., have attracted a number of material researchers [4][5][6][7][8][9][10][11][12][13][14][15]. Some of the mentioned authors used their fibres untreated, while others treated them.…”

Section: Introductionmentioning

confidence: 99%

Influence of Spanish Broom Fibre Treatment, Fibre Length, and Amount and Harvest Year on Reinforced Cement Mortar Quality

et al. 2023

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The use of natural materials, such as natural fibres, in the construction industry is becoming more frequent. The source of natural fibres should be sought in local plants, such as Spanish Broom in the Mediterranean area. The fibre treatment process was carried out in 8 different ways with alkali 4%, 5%, 6%, 8%, 10% and 15% NaOH solution, and 5% NaOH and 2% Na2SO3 mixture solution and seawater. The fibres were tested for tensile strength. No relationship was established between the concentration of the solution and the tensile strength of the fibres. The influence of the reuse of treatment solution on fibre quality was monitored by X-ray diffraction (XRD), ATR-FTIR, and TG/DTG analysis. Fibres with lengths of 1, 2, and 3 cm were added to cement mortar specimens in amounts of 0.5 and 1 vol%. The flexural and compressive strengths were tested on mortar specimens after 28 days. For fibres 1 and 3 cm long, 0.5% natural fibre content gives higher strength results: about 9% for flexural strength and 13.5% and 11.7% for compressive strength in regard to mortar reinforced with fibres of the same length but with a proportion of 1%. For mortar reinforced with fibre 2 cm long, better results are achieved with 1% fibre content, namely 9% higher flexural strength and 11.2% higher compressive strength compared to mortars with 0.5% fibre content. SEM/EDS analysis showed that the fibres are integrated into the cement matrix but that there is no strong interaction with the binder. For examination and 3D visualisation of mortar specimens, a medical device MSCT (Multi-slice Computed Tomography) was also used. For three consecutive years of Spanish Broom harvesting, an analysis of meteorological conditions and the results of the mechanical strength of reinforced mortars is given. For the examined years, the meteorological conditions did not affect the obtained results. Additional knowledge about the Spanish Broom fibres can introduce this plant to the application of new sustainable building materials.

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Durability properties of engineered pulp fibre reinforced concretes made with and without supplementary cementitious materials

Cited by 35 publications

References 26 publications

The Thermo-Phase Change Reactivity of Textile and Cardboard Fibres in Varied Concrete Composites

The Thermo-Phase Change Reactivity of Textile and Cardboard Fibres in Varied Concrete Composites

On the Roles of Cellulose Nanocrystals in Fiber Cement: Implications for Rheology, Hydration Kinetics, and Mechanical Properties

Influence of Spanish Broom Fibre Treatment, Fibre Length, and Amount and Harvest Year on Reinforced Cement Mortar Quality

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