Influence on mechanical properties of concrete of cement replacement with fly ash and river sand replacement with foundry sand

Karumanchi, Meeravali; Bellum, Ramamohana Reddy; Chennupati, Mahesh; Kunchala, Veerabrahmam; Regulagunta, Madhu

doi:10.1016/j.matpr.2022.06.146

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…Fly ash primarily consists of spherical, solid, hollow, and predominantly amorphous particles, including coarse and powdery components. Additionally, fly ash serves as an excellent binding material [24]. Typically, the particle sizes of fly ash range from 1 to 100 µm.…”

Section: Coal Consumption In Malaysia From 2013 To 2022mentioning

confidence: 99%

Thermal Waste Replacement as a Sustainable Approach to Reinforced Concrete Beam Design: A Finite Element Study

Ariffin,

Nasrudin,

Alias

et al. 2024

TOCIEJ

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Introduction The escalating global demand for infrastructure underscores the need for increased construction material use, particularly in concrete, a fundamental component of the construction sector. However, conventional aggregate extraction methods pose significant environmental challenges, including river pollution from sand extraction and deforestation due to rock quarrying. Repurposing industrial waste materials as sustainable concrete components is crucial to address the depletion of natural resources from sand and gravel use. In Malaysia, where electricity production relies on coal, power generation produces waste materials, specifically bottoms such as fly ash and coal combustion by-products in power plants. Disposing of this by-product, primarily in open landfills, raises significant environmental hazards for local communities, impacting health and safety. Aims To address environmental concerns related to natural material depletion and by-product waste abundance, this study explores recycling coal bottom ash and fly ash from coal power plants as part of concrete materials in reinforced concrete beams. Additionally, the paper uses nonlinear analysis in ABAQUS software to explore the structural performance and behavior of RC beams incorporating high volumes of coal ash as replacements for fine and coarse aggregates. Methods Six replacements spanning 50% to 100% were tested alongside 20% cement substitution with fly ash. The mixture includes a 50% replacement of natural fine aggregates with fine coal bottom ash and a 50% replacement of natural coarse aggregates with coarse coal bottom ash. The materials replacement calculation was based on the materials' volume due to the differences in density between the waste material and conventional materials. On the other hand, mechanical properties were assessed through four-point bending load tests, recording deflections, loads, and crack patterns. Finite element analysis models using ABAQUS were also performed to predict the beam behavior and validated against experimental responses. Besides, the parametric study with different beam lengths was also performed to observe the beam behavior and validate the input. Results The inclusion of 100% coarse coal bottom ash (CCBA) and 100% fine coal bottom ash (FCBA) in the concrete mix resulted in significant enhancements in structural performance, surpassing the control RC beam with an ultimate load of 88 kN and a maximum deflection of 18.87 mm. The successful development of a finite element model using ABAQUS software for finite element analysis (FEA) showcases the capability of simulation tools in predicting structural behavior with differences within a 10% range. Besides, the parametric study revealed that longer beams exhibited more prominent cracks and severe failure, indicating the reliability of the input parameters in FEA. Conclusion This study highlights the effectiveness of the proposed approach in enhancing RC beam performance. The findings validate the simulation tool's potential in predicting structural behavior and shed light on the complexities of concrete behavior under varying conditions. As future designs advance, these insights will inform more accurate and robust structural assessments, fostering innovation and improved engineering solutions.

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Section: Coal Consumption In Malaysia From 2013 To 2022mentioning

confidence: 99%

Thermal Waste Replacement as a Sustainable Approach to Reinforced Concrete Beam Design: A Finite Element Study

Ariffin,

Nasrudin,

Alias

et al. 2024

TOCIEJ

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“…The researchers of [34] also discovered that the concrete produced using recycled aggregate and 20% WFS exhibits better characteristics when compared to the controlled concrete. According to this study, the use of WFS, obtained from manufacturing and processing various metals, as a partial replacement for FA in concrete for effective strength gain and long-term performance [35]. This research proposes a framework for the development of WFS reclamation in India through a multi-stakeholder approach.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Self-Compacting Concrete Prepared Using Waste Foundry Sand on Engineering Properties and Life Cycle Assessment

Tangadagi,

Ravichandran

2024

Recycling

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The primary objective of this research is to utilize an industrial waste byproduct such as waste foundry sand (WFS) as an alternative for fine aggregate in self-compacting concrete (SCC). This research focuses on the use of WFS in SCC to enhance durability and mechanical properties, to find an alternative for fine aggregate in SCC, to reduce the disposal challenges of WFS, and to make SCC lightweight and environmentally friendly. Initially, WFS was treated with chemical (H2SO4), segregating, and sieving to remove the foreign matter and clay content. For this study, WFS is considered in varying percentages such as 0, 10, 20, 30, 40, and 50. For this investigation, M60 grade SCC is considered as per Indian standards and EFNARC guidelines. After that, this research focuses on tests on various fresh properties of SCC in each batch to find the flowability and passing ability of various mixes prepared using WFS. Similarly, the mechanical properties of SCC such as compressive, flexural, and split tensile strength tests were performed at 7, 28, and 90 day curing periods, respectively. Likewise, durability properties of SCC were found in all the mixes prepared using WFS such as water absorption, sorptivity, resistance to chemical attack, and chloride ion penetration; tests of these properties were performed at 28 and 90 day curing periods, respectively. Based on the experimental investigation of SCC, it was found that WFS can be used in M60 grade SCC as an alternative for fine aggregate up to 30% without compromising much on its properties. Finally, this establishes that using treated WFS in SCC helps in reducing the generation of waste and prevails as a meaningful utilization method. This research will also establish that the use of treated WFS will reduce the density and make SCC a lightweight, green, and sustainable material.

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“…Research has shown that when an ACM, such as fly ash (FA) [12][13][14], granulated blast furnace slag (GBFS) [12], or silica fume (SF) [15], is added to cement, the slow pozzolanic Materials 2024, 17, 752 2 of 17 effect reduces the strength of cement-based materials during the early hydration period, although their strength improves in the later hydration period. The proportion of cement replaced by mineral admixtures in the above studies was mostly 5-20%.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Study of High-Strength and Corrosion-Resistant Cement-Based Materials Applied in Coastal Acid Rain Areas

Wang,

Zhang,

et al. 2024

Materials

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Investigations regarding the preparation and durability of cement-based materials applied in specific coastal acid rain environments are scarce, particularly those involving the addition of four auxiliary cementitious materials (ACMs) to cement for modification. To improve the durability of concrete structures in coastal acid rain areas, a systematic study was conducted regarding the preparation of high-strength and corrosion-resistant cement-based materials using ACM systems composed of fly ash (FA), granulated blast furnace slag (GBFS), silica fume (SF), and desulfurization gypsum (DG) instead of partial cement. Through an orthogonal experimental design, the effect of the water–binder ratio, cementitious ratio, and replacement cement ratio on the compressive strength, corrosion resistance coefficient, and chloride ion permeability coefficient of the materials were analyzed and the mix proportions of the materials were evaluated and optimized using the comprehensive scoring method. The results show that implementing a FA:GBFS:SF:DG ratio of 2:6:1:1 to replace 60% of cement allows the consumption of calcium hydroxide crystals generated through cement hydration, promotes the formation of ettringite, optimizes the pore structures of cementitious materials, and improves the compressive strength, acid corrosion resistance, and chloride ion permeability of the materials. This study provides a reference for selecting concrete materials for buildings in coastal acid rain environments.

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Influence on mechanical properties of concrete of cement replacement with fly ash and river sand replacement with foundry sand

Cited by 8 publications

References 15 publications

Thermal Waste Replacement as a Sustainable Approach to Reinforced Concrete Beam Design: A Finite Element Study

Thermal Waste Replacement as a Sustainable Approach to Reinforced Concrete Beam Design: A Finite Element Study

Performance Evaluation of Self-Compacting Concrete Prepared Using Waste Foundry Sand on Engineering Properties and Life Cycle Assessment

Preparation and Performance Study of High-Strength and Corrosion-Resistant Cement-Based Materials Applied in Coastal Acid Rain Areas

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