Investigation on Mechanical and Durability Properties of Concrete Mixed with Silica Fume as Cementitious Material and Coal Bottom Ash as Fine Aggregate Replacement Material

Ali, Tariq; Buller, Abdul Salam; Abro, Fahad ul Rehman; Ahmed, Zaheer; Shabbir, Samreen; Lashari, Ali Raza; Hussain, Ghulam

doi:10.3390/buildings12010044

Cited by 21 publications

(11 citation statements)

References 34 publications

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“…Ali et al [26] studied the use of a combination of silica fume and bottom ash in concrete. They found that replacing 12.5% of cement with silica fume and 30% of fine aggregate with bottom ash resulted in a compressive strength of 38.45 MPa and a flexural strength of 4.74 MPa.…”

Section: Literature Reviewmentioning

confidence: 99%

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Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

2023

IJATEE

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The combustion process of coal in a steam power plant produces about 5% of fly ash and bottom ash (FA-BA) waste, which is a solid waste material that cannot be burned and can cause environmental pollution. This research aimed to modify lightweight concrete by using fly ash waste as a substitute for Portland cement and bottom ash waste as a substitute for fine aggregate. The lightweight concrete was tested for resistance to hydrochloric acid (HCl) with a potential of hydrogen (pH) range of 6-8 under three test conditions. The percentage of fly ash waste used as a substitute for cement ranged from 10% to 40% of the total weight of cement, while the percentage of bottom ash waste used as a substitute for fine aggregate ranged from 30% to 50% of the total weight of fine aggregate. The test results showed that the lightweight concrete composition with the lightest specific gravity was found in the FL40BO50 mixture with a density of 1.70 gr/cm 3 and a minimum compressive strength of 15.92 MPa. However, the most optimal specific gravity was found in the FL20BO30 mixture. The lightweight concrete with a specific gravity of 1.84 gr/cm 3 and the most optimal compressive strength of 25.17 MPa was obtained. In the test results for HCl resistance, the lightweight concrete with the FL20BO30 mixture experienced the minimum mass loss, while the FL40BO50 mixture experienced the maximum decrease in mass. Under testing conditions 1, the lightweight concrete experienced a mass decrease ranging from 0.36% to 1.61% of the initial mass. Under testing conditions 2, the lightweight concrete decreased in mass by 0.65% to 3.50% of the initial mass. Under testing condition 3, the lightweight concrete experienced a mass decrease ranging from 1.03% to 4.81% of the initial mass. The decrease in mass was due to the formation of microcracks in the lightweight concrete caused by the chloride content in the HCl solution, which attacked the bonding mechanism in the lightweight concrete.

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Section: Literature Reviewmentioning

confidence: 99%

“…It has an irregular shape with large pores; thus, it affects the workability of the concrete. High water absorption due to the large pores could resulted in a bad workability in concrete [26,27].…”

Section: Bottom Ashmentioning

confidence: 99%

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

2023

IJATEE

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“…Previous research concluded that coal bottom ash can be a suitable substitute material for fine aggregate in concrete mix combined with silica fume. 30 % coal bottom ash replacement as fine aggregate along with 12.5 percent silica fume as a cement replacement achieved a maximum compressive strength of 38.45 Mpa which is almost 21% higher than the conventional concrete results [5]. In recent research it is mentioned that waste tires are recycled in four ways whole, cut, chipped or shredded and crumb.…”

Section: Introductionmentioning

confidence: 97%

A Study on the Mechanical Properties of Green Concrete

et al. 2022

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Green concrete is a type of concrete that uses waste materials as one of its ingredients. Hazardous wastes like fly ash and silica fume can be used to partially replace cement in concrete, which varies in physical and chemical properties. On the other hand, the increase in automobiles in urban and rural areas has led to an increase in the number of waste tires, which promotes environmental pollution due to disposal issues throughout the world. This study aims to use waste materials which can partially replace cement and conventional aggregates in the concrete mix. Fly Ash (FA), Silica Fume (SF), and Plaster of Paris (PP) replaced cement, whereas Reclaimed Rubber (RR) partially replaced coarse aggregates by weight. This work is focused on experimentation and simulation of M 40 grade mix using the above four materials. 306 cubes were cast by replacing cement with FA, SF, and PP in 3% increments up to 24%. Similarly, coarse aggregates were replaced with RR using the same proportion. Compression tests were carried out using a Universal Testing Machine. 12% silica fume replacement exhibited maximum strength during individual replacement of materials in concrete, which is selected as the optimum percentage replacement. FA and PP developed ultimate strength at 9% replacement of cement in the concrete mix, which is considered the optimum replacement percentage. A Genetic Algorithm (GA) model was developed using a C++ program to simulate various combinations of FA, SF, PP, and RR based on individual optimum replacement percentage. Hence, 1600 combinations were identified with the above four materials. Hence, GA was used as a tool to simulate the compressive strength of concrete to reduce time and cost. During simulation of combined replacement using GA, very high and very low compressive strength values were neglected, and 32 combinations were selected based on optimum compressive strength values. Finally, five combinations (C1-C5) were recognized, which resulted in higher compressive strength than individual optimum values after simulation. The GA-based numerical results were validated by casting 15 cubes for all the five combinations. 15 beam samples of size 100 150 1500 mm were cast with the above five combinations, cured and tested using a loading frame. A load-deflection curve was plotted, which showed that material replacement increased the flexural strength of the concrete mix. Doi: 10.28991/CEJ-2022-08-05-012 Full Text: PDF

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“…Concrete is second to none in the list of man-made materials used in the construction industry all over the world for both residential and commercial buildings [1,2]. Its durability, aesthetic appeal, low maintenance cost and the ease with which it can be produced are the primary reasons of popularity.…”

Section: Introduction 1generalmentioning

confidence: 99%

Strength and durability assessment of high-strength concrete with weathered crystalline rock waste as a sustainable partial replacement for fine aggregate

Jamal,

Meyyappan

2024

Matéria (Rio J.)

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Sand mining from riverbeds has been a vital component of the construction industry for decades, providing a fundamental ingredient for concrete production. However, the indiscriminate extraction of sand from riverbeds led to serious environmental issues, like erosion of riverbeds, destruction of aquatic habitats and increased susceptibility to flooding which emphasizes the necessity of finding alternate materials. Recent studies on Weathered Crystalline Rock, a soft upper layer in quarries -often discarded as waste -have shown that WCR-sand could be a viable alternative to fine-aggregates in concrete thereby alleviating the environmental impacts caused by the extraction of natural resources. Five mixes of M65 grade concrete with sand replacement of 5%, 10%, 15% and 20% with WCR-sand were prepared, cured for maximum 90 days and tested for mechanical and durability properties. Results obtained led to the conclusion that WCR-sand can be a partial replacement up to 5% -theoretically and even up to 10% practically -of sand in concrete without affecting the mechanical and durability properties. This could potentially reduce sand-mining and rock-quarrying up-to 5 to 10% which not only helps curb the depletion of natural resources, a major environmental concern today, but aids in managing waste materials from quarrying.

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Investigation on Mechanical and Durability Properties of Concrete Mixed with Silica Fume as Cementitious Material and Coal Bottom Ash as Fine Aggregate Replacement Material

Cited by 21 publications

References 34 publications

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

Analysis of chloride resistance in light weight concrete made from fly ash and bottom Ash

A Study on the Mechanical Properties of Green Concrete

Strength and durability assessment of high-strength concrete with weathered crystalline rock waste as a sustainable partial replacement for fine aggregate

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