Effect of pretreated biomass fly ash on the mechanical properties and durability of cement mortar

Kim, Kyeong Woo; Park, Kyu Tae; Ates, Fatmanur; Kim, Hong Gi; Woo, Byeong Hun

doi:10.1016/j.cscm.2022.e01754

Cited by 8 publications

(6 citation statements)

References 32 publications

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“…Additionally, the added WWBA particles would act as a nucleation zone after their integration into the cement paste, resulting in improved hydration and subsequently the enhancement of compressive strength [35]. The increase in the general porosity of WWBA-produced cementitious materials could be caused by irregular shaped particles of ash that contain numerous pores not filled by the hydration products after curing and subsequent hardening, but micropores in the size range of 0.01-0.1 µm could greatly increase due to the wide distribution of particles and irregular particle structures which seem to fill the pores [66]. The Mercury Intrusion Porosimetry (MIP) test showed that WWBA increases the porosity of hardened cement paste (Figure 9): with the addition of WWBA at 6%, the porosity of hardened cement paste increased 11.5% and with 12% of WWBA the porosity increases 25.8%.…”

Section: The Impact Of Wwba On Cement Hydrationmentioning

confidence: 99%

The Impact of Milled Wood Waste Bottom Ash (WWBA) on the Properties of Conventional Concrete and Cement Hydration

Vaičienė,

Malaiškienė,

Maqbool

2023

Materials

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Wood waste bottom ash (WWBA) is a waste generated in power plants during the burning of forest residues to produce energy and heat. In 2019, approximately 19,800 tons of WWBA was generated only in Lithuania. WWBA is rarely recycled or reused and is mostly landfilled, which is both costly for the industry and unsustainable. This study presents a sustainable solution to replace a part of cement with WWBA at 3%, 6%, 9%, and 12% by weight. Problems are also associated with the use of this material, as WWBA could have a relatively large surface area and a high water demand. For the evaluation of the possibilities of WWBA use for cementitious materials, the calorimetry test for the cement paste as well as X-ray diffraction (XRD), thermography (TG, DTG), and porosity (MIP) for hardened cement paste with the results of physical and mechanical properties, and the freeze–thaw resistance of the concrete was measured and compared. It was found that WWBA with a large quantity of CO2 could be used as a microfiller with weak pozzolanic properties in the manufacture of cementitious materials. As a result, concrete containing 6% WWBA used to substitute cement has higher density, compressive strength at 28 days, and ultrasonic pulse velocity values. In terms of durability, it was verified that concrete modified with 3%, 6%, 9%, and 12% WWBA had a freeze–thaw resistance level of F150. The results show that the use of WWBA to replace cement is a valuable sustainable option for the production of conventional concrete and has a positive effect on durability.

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Section: The Impact Of Wwba On Cement Hydrationmentioning

confidence: 99%

The Impact of Milled Wood Waste Bottom Ash (WWBA) on the Properties of Conventional Concrete and Cement Hydration

Vaičienė,

Malaiškienė,

Maqbool

2023

Materials

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“…Saeed et al [2] replaced the cement with slag up to 45%. Kim et al [3] replaced the cement with biomass wood fly ash up to 30%. These studies demonstrated that, while maintaining mechanical properties comparable to ordinary cement, durability generally improved.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning-Based Simulation of the Air Conditioner Operating Time in Concrete Structures with Bayesian Thresholding

Jang,

Kim,

Woo

2024

Materials

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Efficient energy use is crucial for achieving carbon neutrality and reduction. As part of these efforts, research is being carried out to apply a phase change material (PCM) to a concrete structure together with an aggregate. In this study, an energy consumption simulation was performed using data from concrete mock-up structures. To perform the simulation, the threshold investigation was performed through the Bayesian approach. Furthermore, the spiking part of the spiking neural network was modularized and integrated into a recurrent neural network (RNN) to find accurate energy consumption. From the training-test results of the trained neural network, it was possible to predict data with an R2 value of 0.95 or higher through data prediction with high accuracy for the RNN. In addition, the spiked parts were obtained; it was found that PCM-containing concrete could consume 32% less energy than normal concrete. This result suggests that the use of PCM can be a key to reducing the energy consumption of concrete structures. Furthermore, the approach of this study is considered to be easily applicable in energy-related institutions and the like for predicting energy consumption during the summer.

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“…of the process. [47][48][49][50] However, challenges remain in terms of the variability in ash composition, the presence of heavy metal contaminants, and the energy requirements for processing. Economically, while the low cost of ash as a waste product is advantageous, the overall feasibility of these strategies depends on the costs associated with treatment, processing, and system integration.…”

Section: Introductionmentioning

confidence: 99%

Harnessing Ash for Sustainable CO₂ Absorption: Current Strategies and Future Prospects

Wu,

Zhang,

Wang

et al. 2024

Chemistry An Asian Journal

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This review explores the potential of using different types of ash, namely fly ash, biomass ash, and coal ash etc., as mediums for CO2 capture and sequestration. The diverse origins of these ash types—municipal waste, organic biomass, and coal combustion—impart unique physicochemical properties that influence their suitability and efficiency in CO2 absorption. This review first discusses the environmental and economic implications of using ash wastes, emphasizing the reduction in landfill usage and the transformation of waste into value‐added products. Then the chemical/physical treatments of ash wastes and their inherent capabilities in binding or reacting with CO2 are introduced, along with current methodologies utilize these ashes for CO2 sequestration, including mineral carbonation and direct air capture techniques. The application of using ash wastes for CO2 capture are highlighted, followed by the discussion regarding challenges associated with ash‐based CO2 absorption approach. Finally, the article projects into the future, proposing innovative approaches and technological advancements needed to enhance the efficacy of ash in combating the increasing CO2 levels. By providing a comprehensive analysis of current strategies and envisioning future prospects, this review aims to contribute to the field of sustainable CO2 absorption and environmental management.

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Effect of pretreated biomass fly ash on the mechanical properties and durability of cement mortar

Cited by 8 publications

References 32 publications

The Impact of Milled Wood Waste Bottom Ash (WWBA) on the Properties of Conventional Concrete and Cement Hydration

The Impact of Milled Wood Waste Bottom Ash (WWBA) on the Properties of Conventional Concrete and Cement Hydration

Machine Learning-Based Simulation of the Air Conditioner Operating Time in Concrete Structures with Bayesian Thresholding

Harnessing Ash for Sustainable CO₂ Absorption: Current Strategies and Future Prospects

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Effect of pretreated biomass fly ash on the mechanical properties and durability of cement mortar

Cited by 8 publications

References 32 publications

The Impact of Milled Wood Waste Bottom Ash (WWBA) on the Properties of Conventional Concrete and Cement Hydration

The Impact of Milled Wood Waste Bottom Ash (WWBA) on the Properties of Conventional Concrete and Cement Hydration

Machine Learning-Based Simulation of the Air Conditioner Operating Time in Concrete Structures with Bayesian Thresholding

Harnessing Ash for Sustainable CO2 Absorption: Current Strategies and Future Prospects

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Product

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Harnessing Ash for Sustainable CO₂ Absorption: Current Strategies and Future Prospects