Sorptivity and mechanical properties of fiber-reinforced concrete made with seawater and dredged sea-sand

Vafaei, Davoud; Hassanli, Reza; Ma, Xing; Duan, Jinming; Zhuge, Yan

doi:10.1016/j.conbuildmat.2020.121436

Cited by 75 publications

(19 citation statements)

References 93 publications

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“…With increase of glass fibers in the mortar, the quantity of pores increases. Similar regularity was shown by Vafaei et al [ 64 ]. He noticed that air content increases slightly with 0.3% addition of polypropylene and polyvinyl alcohol fibers.…”

Section: Resultssupporting

confidence: 91%

Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study

et al. 2021

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The progressive increase in the amount of glass waste produced each year in the world made it necessary to start the search for new recycling methods. This work summarizes the experimental results of the study on mortar samples containing dispersed reinforcement in the form of glass fibers, fully made from melted glass waste (bottles). Mortar mixes were prepared according to a new, laboratory-calculated recipe containing glass fibers, granite as aggregate, polycarboxylate-based deflocculant and Portland cement (52.5 MPa). This experimental work involved three different contents (600, 1200, and 1800 g/m3) of recycled glass fibers. After 28 days, the mechanical properties such as compressive, flexural, and split tensile strength were characterized. Furthermore, the modulus of elasticity and Poisson coefficient were determined. The initial and final setting times, porosity, and pH of the blends were measured. Images of optical microscopy (OM) were taken. The addition of glass fibers improves the properties of mortar. The highest values of mechanical properties were obtained for concrete with the addition of 1800 g/m3 of glass fibers (31.5% increase in compressive strength, 29.9% increase in flexural strength, and 97.6% increase in split tensile strength compared to base sample).

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Section: Resultssupporting

confidence: 91%

Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study

et al. 2021

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“…The loss of weight due to the marine water was improved up to 47% with the incorporation of hybrid fibres, whereas the loss in compressive strength was improved by 66%. The loss in mass and compressive strength of HTGPC was lower than the TGPC, which is similar to the sample treated in the acid environment [44,52].…”

Section: Marine Attacksupporting

confidence: 61%

“…It is clear from the figure that the values are well within the limits of 0.09-0.17 mm/min 0.5 for concrete [33]. The results clearly explain that the incorporation of hybrid fibres reduced the sorptivity value, which shows the improvement in the quality of the concrete [44]. In comparison with TGPC samples, HTGPC gives lower sorptivity cofficients.…”

Section: Sorptivitymentioning

confidence: 71%

Effect of Hybrid Fibres on the Durability Characteristics of Ternary Blend Geopolymer Concrete

2021

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The need to develop sustainable concrete in the civil infrastructure industry increases day by day, resulting in new eco-friendly materials such as geopolymer concrete. Geopolymer concrete is one of the eminent alternatives to conventional concrete for sustainable development by reducing the carbon footprint. Ternary blend geopolymer concrete (TGPC) is a sustainable and environmentally friendly concrete produced with three different source materials to form a binder. The main advantage of TGPC is that it possesses densely packed particles of different shapes and sizes, which results in improved properties. This paper deals with the experimental investigations to evaluate the durability properties of plain and hybrid fibre reinforced TGPC. The durability of concrete is defined as the ability to withstand a safe level of serviceability and different environmental exposure conditions without any significant repair and rehabilitation throughout the service life. Conventional concrete is vulnerable to cracking due to its low tensile and durability properties. The TGPC considered in this work consists of fly ash, GGBS and metakaolin as source materials, selected mainly based on the material’s silica and alumina content, shape, size, and availability. The grade of concrete considered was M55. The main variables considered in this study were the proportions of crimped steel fibres (Vf), viz., 0.5% and 1% and proportions of polypropylene fibres (Vp)viz., 0.1%, 0.15%, 0.20% and 0.25%. The durability properties like water absorption, sorptivity, resistance to marine attack, acid attack, sulphate attack, and abrasion were studied in this investigation. The experimental test results were compared with the requirements provided in the standard/literature and found to be well within limits. The study also indicates that the inclusion of fibres in a hybrid form significantly improves the durability parameters of TGPC. The TGPC with 1% steel fibre and 0.15% polypropylene fibre performs better than the other combination of fibres considered in this experimental investigation.

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“…Fiber-reinforcement is not as effective in compression as it is in splitting tensile strength and flexural strength. Similar to coir, industrial polypropylene and polyvinyl fibers, due to their lower density, have also exhibited negative effects on the compressive strength [ 15 , 74 , 75 ].…”

Section: Resultsmentioning

confidence: 99%

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

et al. 2022

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The issue of brittleness and low post-peak load energy associated with the plain HSC led to the development of fiber-reinforced concrete (FRC) by using discrete fiber filaments in the plain matrix. Due to the high environmental impact of industrial fibers and plasticizers, FRC development is ecologically challenged. Sustainability issues demand the application of eco-friendly development of FRC. This study is aimed at the evaluation of coir as a fiber-reinforcement material in HSC, with the incorporation of silica fume as a partial replacement of cement. For this purpose, a total of 12 concrete mixes were produced by using three different doses of coir (0%, 1%, 1.5%, and 2% by wt. of binder) with silica fume (0%, 5%, and 10% as volumetric replacements of cement). The examined parameters include compressive strength, shear strength, splitting tensile strength, ultrasonic pulse velocity, water absorption, and chloride ion permeability. The scanning electron microscopy (SEM) technique was adopted to observe the microstructure of the CF-reinforced concrete. The results revealed that due to the CF addition, the compressive strength of HSC reduces notably; however, the splitting tensile strength and shear strength experienced notable improvements. At the combined incorporation of 1.5% CF with 5% silica fume, the splitting tensile strength and shear strength of the concrete experienced improvements of 47% and 70%, respectively, compared to that of the control mix. The CF incorporation is detrimental to the imperviousness of concrete. The combined incorporation of CF and silica fume is recommended to minimize the negative effects of CF on the permeability resistance of concrete. The SEM results revealed that CF underwent a minor shrinkage with the age.

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Sorptivity and mechanical properties of fiber-reinforced concrete made with seawater and dredged sea-sand

Cited by 75 publications

References 93 publications

Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study

Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study

Effect of Hybrid Fibres on the Durability Characteristics of Ternary Blend Geopolymer Concrete

Development of Ductile and Durable High Strength Concrete (HSC) through Interactive Incorporation of Coir Waste and Silica Fume

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