Wastepaper sludge ash

Kinuthia, John

doi:10.1016/b978-0-08-102156-9.00010-9

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Due to the high water demand features of hypo sludge, its presence had the impact of lowering compressive strength at an early age. During the early curing phase, a second cementing reaction takes place, which boosts compressive strength relative to the control concrete [37]. In 7 and 28 days, the increase in strength for the mix BFC was 8.76% and 18.81%.…”

Section: Mechanical Properties 411 Compressive Strengthmentioning

confidence: 97%

Development of Sustainable Concrete from Hypo Sludge Combined with Basalt Fibre and Latex

Sekar¹,

Murugesan²,

Sivaraja³

et al. 2023

Sustainability

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Cement production is a major source of carbon dioxide pollution. An environmentally friendly concrete needs to be developed in order to overcome the adverse environmental impacts of cement production and the continuing depletion of natural resources. Paper waste (hypo sludge) from the paper industry is becoming a challenge due to its extensive area requirements for disposal and continually increasing adverse environmental effects. To reduce paper waste and pollution, it might be beneficial to use it as hypo sludge in concrete mixes. In the present investigation, hypo sludge was used as a partial replacement in varied proportions (5, 10, 15, 20, 25, and 30%) of cement in concrete of M30 grade to be assessed. Styrene–butadiene rubber (SBR) latex and basalt fibre (BF) were added to hypo sludge concrete to improve its durability and post-cracking behaviour. From the test results, the optimum dosage of hypo sludge, basalt fibre, and SBR latex was found to be 15%, 0.3%, and 10%, respectively. From the mechanical properties testing compared with the control concrete, latex-added hypo sludge basalt fibre showed an increase in compressive strength by 17.08%, flexural strength by 14.55% and tensile strength by 14.29%. Microstructural results showed that SBR latex created greater consistency in the interaction of the concrete stages. Results of the tests indicate that the performance of the concrete in terms of its strength was improved by partially replacing the cement in the concrete with hypo sludge.

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Section: Mechanical Properties 411 Compressive Strengthmentioning

confidence: 97%

Development of Sustainable Concrete from Hypo Sludge Combined with Basalt Fibre and Latex

Sekar¹,

Murugesan²,

Sivaraja³

et al. 2023

Sustainability

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show abstract

“…Cellulosic fibre length, as well as strength, decreases during the collection of pulp, requiring its blending with virgin fibres for paper production. However, used paper can be recycled three to eight times to collect cellulosic fibres, then the used paper has to be discarded as solid waste [8,9]. Based on the data presented in the CEPI-2020 (Confederation of European Paper Industries) report, in 2019, world average used paper recycling was 58.6% with the highest rate in the European Union (EU) (72.5%), followed by North America (65.7%), Asia (53.9%), Latin America (47.2%), and Africa (35.2%) [4].…”

Section: Introductionmentioning

confidence: 99%

Energy Recovery from Waste Paper and Deinking Sludge to Support the Demand of the Paper Industry: A Numerical Analysis

Fraia

Uddin

2022

Sustainability

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The recovery of fibres from waste paper (WP) and deinking sludge (DIS) reduces the stress on nature compared to the collection of virgin pulp for paper production. Moreover, if not recycled, WP and DIS are mainly landfilled and incinerated, being thus responsible for the release of greenhouse gases (GHGs) into the atmosphere. In this context, energy recovery from WP and DIS would contribute to increasing energy independence and improving waste management in the pulp industry. From a broader perspective, it would increase renewable energy generation, supporting the paper industry in reducing fossil fuel consumption and GHGs emissions, in line with the goals of the European Union (EU) Green Deal 2021. For these reasons, in the present study, the combined heat and power generation potentiality of WP–DIS blends through gasification in combination with an internal combustion engine is numerically assessed for the first time. The air gasification process is simulated by applying a restricted chemical equilibrium approach to identify the optimum operating temperature (850 °C) and equivalence ratio (0.2). Electrical and thermal energy generation potentiality, considering WP and DIS production in the EU in 2019, is estimated to be in the ranges of 32,950–35,700 GWh and 52,190–56,100 GWh, respectively. Thus, it can support between 25 and 28% of the electrical and 44–48% of the thermal energy demand of the paper manufacturing sector, reducing the CO2 emission in the range of 24.8–28.9 Gt.

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Valorization of Wastepaper Sludge Ash as Supplementary Cementitious Material in Concrete

Hunyak

Hidei

Sobol

et al. 2022

Lecture Notes in Civil Engineering

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Wastepaper sludge ash

Cited by 5 publications

References 26 publications

Development of Sustainable Concrete from Hypo Sludge Combined with Basalt Fibre and Latex

Development of Sustainable Concrete from Hypo Sludge Combined with Basalt Fibre and Latex

Energy Recovery from Waste Paper and Deinking Sludge to Support the Demand of the Paper Industry: A Numerical Analysis

Valorization of Wastepaper Sludge Ash as Supplementary Cementitious Material in Concrete

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