RETRACTED ARTICLE: An experimental investigation on mechanical,
durability and Microstructural Properties of high-volume fly ash based
concrete

Swathi, Vennam; Asadi, S.S.

doi:10.1007/s41024-022-00172-3

Cited by 6 publications

(14 citation statements)

References 32 publications

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“…Figure 4 shows that the utilisation of 20 mm at 1 wt.% loading content DPF yielded the optimal results, with compressive strengths depicting enhancements of 4.90% when comparing to the unreinforced control samples after 28 days of curing. This is in opposition to the rest of the research outcomes obtained on the compressive strength of DPF composites investigated by other researchers, which showed that DPF utilization decreases the compressive strength when used as a reinforcement in developing cementitious composites [7,[31][32][33][34]. This may be attributed by utilizing different DPF characteristics, length and loading contents, that are not similar to the characteristics utilized in this research investigation.…”

Section: Effect Of Untreated Dpf Length and Loading Content On The Co...contrasting

confidence: 92%

“…Thus, substituting OPC partially with GGBS will reduce the negative environmental impact of OPC and the waste of GGBS, hence improving the durability and quality of the composites developed [10]. Furthermore, several researchers have reported many mix designs and properties involving waste cementitious materials that can be considered for developing hybrid composites along with natural fibre reinforcements [15,[23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Critical evaluation of date palm sheath fibre characteristics as a reinforcement for developing sustainable cementitious composites from waste materials

Awad

Ghaffar

Hamouda

et al. 2022

Biomass Conv. Bioref.

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Decarbonizing the construction industry is an important step towards achieving the net-zero goals for many countries. New technologies and materials are extensively investigated and proposed to meet sustainability guidelines imposed by governments. This research develops a novel mix of sustainable pozzolanic cementitious composite ordinary Portland cement (OPC) with ground granulated blast-furnace slag (GGBS)) reinforced with date palm fibre (DPF) to evaluate the effect of varying DPF loading contents (1, 2, and 3 wt.%) and lengths (10, 20, 30, and 40 mm) on the mechanical (compressive and flexural strength) and physical properties (water absorption) of the produced composite. The effect of curing conditions and DPF surface modification on the mechanical and physical properties was also explored. The results showed that the utilization of DPF as a reinforcement for GGBS/OPC improves the flexural and compressive strength of the composites, which represents a sustainable alternative to synthetic reinforcements for construction applications. Optimal results were demonstrated at the inclusion of 20-mm alkali-treated DPF at a loading content of 1 wt.% showing an enhancement in strength by 57.12% and 30.97% of flexural and compressive strength, respectively, at 28 days of ageing in a water bath. Graphical abstract

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Section: Effect Of Untreated Dpf Length and Loading Content On The Co...contrasting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Critical evaluation of date palm sheath fibre characteristics as a reinforcement for developing sustainable cementitious composites from waste materials

Awad

Ghaffar

Hamouda

et al. 2022

Biomass Conv. Bioref.

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show abstract

“…In their review, they focus on concrete and the characteristics of FA [17]. Swathi and Asadi (2022) [18,19] experimentally investigated the mechanical strength and durability of HVFA (70%wt) to understand the performance, and microstructure characteristics using the rapid chloride penetration, water absorption, and sorptivity tests. Other reviews are brief in nature, summarizing, and do not necessarily focus on HVFA.…”

Section: Materials Methods and Content Analysismentioning

confidence: 99%

“…Table 1 provides a summary of research findings on the HVFA binder's FA/Pc ratio and flexural strength. Swathi and Asadi (2022) [18] reported that the maximum flexural strength is observed at 50% FA at 8.58 MPa after 90 days [20]. While most authors seem to argue that optimum strength is achieved between 50-60% FA, it is clear from Table 1 that recent research indicates the possibility of almost similar results for FA dosages within the range of 70-80% FA [7,28].…”

Section: Flexural Strength Testmentioning

confidence: 99%

“…where S is the coefficient of sorptivity in mm/min 1/2 ), i = ∇w A * d , A is the surface exposed to water in mm 2 , t is the time in minutes, ∇w is a change in weight, and d is the density of water in g/mm 3 (Swathi and Asadi 2022) [18]. Figure 6 illustrates that the sorptivity of binary mixes of HVFA binders without additives is significantly higher at both early age and late stages compared with Pc systems.…”

Section: Water Absorption Permeability and Sorptivitymentioning

confidence: 99%

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Strength and Durability Properties of High-Volume Fly Ash (HVFA) Binders: A Systematic Review

Runganga,

Okonta,

Musonda

2024

CivilEng

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South Africa is endowed with a wealth of coal-fired power stations that can produce extremely high volumes of fly ash per year exceeding 34 million tonnes. The use of high-volume fly ash (HVFA) binders in the construction sector has the capacity to significantly reduce greenhouse gas emissions associated with traditional cement production and offset the carbon footprint of Eskom. The excessive production of fly ash by Eskom warrants the need for developing ultra-high-volume fly ash binders (UHVFA, fly ash/binder > 60 wt%). Nonetheless, fly ash (FA) replacement of cement is still largely limited to 35% regardless of more ambitious research indicating the potential to surpass 60%. In view of the urgent need for South Africa to offset and reduce its carbon footprint, this work reviews and summarises the literature on the performance of HVFA binders with a focus on two specific areas: (i) strength and (ii) durability. On HVFA binder strength, the focus is drawn on work that analysed the compressive strength, flexural strength, and split tensile strength. This review focuses on the extant literature analysing the durability of HVFA binders using various tests, including sorptivity, resistivity, permeability, tortuosity, rapid chloride penetration tests, resistance to sulphate attack, and microstructural analysis. As the FA content increases towards optima, i.e., 50–80%, the most indicative composite characteristics of the strength and durability properties are UCS (30–90 MPa) and permeability (low). This review reveals the leading methodologies, instrumentation, findings, challenges, and contradictions.

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Study on Modified Water Permeability Method for Fly Ash Concrete in Comparison with DIN 1048 (Part 5)

et al. 2023

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RETRACTED ARTICLE: An experimental investigation on mechanical, durability and Microstructural Properties of high-volume fly ash based concrete

Cited by 6 publications

References 32 publications

Critical evaluation of date palm sheath fibre characteristics as a reinforcement for developing sustainable cementitious composites from waste materials

Critical evaluation of date palm sheath fibre characteristics as a reinforcement for developing sustainable cementitious composites from waste materials

Strength and Durability Properties of High-Volume Fly Ash (HVFA) Binders: A Systematic Review

Study on Modified Water Permeability Method for Fly Ash Concrete in Comparison with DIN 1048 (Part 5)

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