Compressive strength performance of OPS lightweight aggregate concrete containing coal bottom ash as partial fine aggregate replacement

Muthusamy, Khairunisa; Hafizuddin, Rasid Mohamad; Yahaya, Fadzil Mat; Sulaiman, Mohd Arif; Mohsin, Sharifah Maszura Syed; Tukimat, Nurul Nadrah Aqilah; Omar, Roshartini; Chin, Siew Choo

doi:10.1088/1757-899x/342/1/012099

Cited by 20 publications

(6 citation statements)

References 8 publications

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“…However, most research showed that mortar/concrete using CBA as aggregate replacement showed lower early-age performance than control concrete [7][8][9][10][11]. The mechanical strength of mortar/concrete with CBA as an aggregate replacement was not performing well at early age; however, it increased performance at a later curing age, after 28 days [9,[12][13][14][15]. The reason for this phenomenon was mainly due to the slower pozzolanic reaction of CBA, which caused the cement's hydration rate at early ages to decrease.…”

Section: Introductionmentioning

confidence: 99%

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Ban,

Ping,

Lapongan

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Coal bottom ash (CBA) is a significant waste produced by the coal manufacturing power plant, harming the environment. CBA has been used in many studies to replace sand in cementitious materials. However, few studies have investigated the use of CBA in concrete as a sand replacement with densified silica fume (DSF) as a cement replacement. DSF is a potential supplementary cementitious material (SCM) to combat the engineering properties of concrete that are typically decreased when CBA is used as a replacement for natural aggregate. Therefore, the present study aimed to evaluate the influence of DSF on the engineering properties of concrete containing different content of CBA as a partial replacement for natural sand. The mix design of the ordinary Portland cement (OPC) and binary blended concrete comprised 90% OPC and 10% DSF by total binder’s weight. The CBA as the fine aggregate replacement was used at 25%, 50%, 75%, and 100% by total aggregate volume. The mechanical, porosity, absorption performance of DSF and CBA (DSF+CBA) concrete containing CBA as partial aggregate replacement material were investigated. DSF+CBA with 50% CBA replacement showed improved mechanical strength performance than control by 15% at 28d and 5.6% at 56d of curing. However, the total porosity performance for DSF+CBA concrete decrease as CBA content increases. In conclusion, the DSF as SCM in binary blended concrete with CBA content up to 50% achieved a better performance in terms of mechanical properties even though the porosity was marginally increased.

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Section: Introductionmentioning

confidence: 99%

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Ban,

Ping,

Lapongan

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The need of the hour is to reduce the overburden on the natural resources and alternative constituents of concrete must be explored that can perform in tandem with concrete prepared with conventional ingredients. Numerous industrial waste has been investigated for the potential replacement of cement, fine aggregates, and coarse aggregates in concrete [2][3][4][5][6][7][8][9][10][11][12]. Recently, many industrial wastes like fly ash, silica fumes, slag, recycled concrete aggregates, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, many industrial wastes like fly ash, silica fumes, slag, recycled concrete aggregates, etc. have been discovered as alternative cement and aggregates in concrete, and promising results have been stated worldwide [2,[4][5][6][7][8][9][10][11][12]. The rise in the global population results in increasing demand for concrete as well.…”

Section: Introductionmentioning

confidence: 99%

An investigation on optimizing the carbonation resistance of coal bottom ash concrete with its carbon footprints and eco-costs

Ankur,

Singh

2023

Res. Eng. Struct. Mat.

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Energy from coal-fed thermal power plants is provided at the cost of the generation of coal ash. Coal bottom ash (CBA) is an ash generated in coal-fed power plants which is landfilled. Existing literature reports the potential of CBA as a replacement for Portland cement (PC) and natural fine aggregates (NFA) in concrete. Carbonation is an important durability parameter of concrete having fatal consequences at later ages if not estimated and controlled as it leads to corrosion in reinforcement. In the present study, experimental, microstructural, and statistical analysis along with life cycle assessment was performed to investigate the combined effect of two-hour grinded CBA (GCBA) as PC (10-30%) and raw CBA as NFA replacement (0-50%) on compressive strength and carbonation resistance. Accelerated carbonation tests were performed at an exposure of four weeks after 28 and 90 days of curing. Among CBA-based concrete mixes, concrete with 20% GCBA and 25% CBA (G20C25) reported higher compressive strength and carbonation depth owing to pozzolanic reactivity and filler effect of fine CBA particles. However, G20C25 resulted in comparable performance in comparison with the control mix in terms of strength and carbonation resistance. The findings of X-ray diffraction spectroscopy, scanning electron microscopy and Fourier transform infrared spectroscopy also validate the trends. The mathematical models derived for the carbonation resistance and strength were well-fitted. Multi-objective optimization recommended 21.5% GCBA and 29.8% CBA as the optimum amount that resulted in 20.08% and 19.40% lower carbon footprints and eco-costs compared to control mix.

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“…Bottom ash particles are also highly porous, so they can reduce the shrinkage that occurs in lightweight concrete [9]. Bottom ash as a partial replacement for sand in lightweight concrete mixes, namely 25% and using a foaming agent of 50%, can contribute to a concrete density of 984 kg/m 3 [10].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Fly Ash and Bottom Ash on the Properties of Aerated Concrete under Density-Based Mix Design

Radna Kurnia Sari,

Rosidawani,

Arie Putra Usman

et al. 2023

ARASET

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Lightweight concrete has the main characteristic of a lower density value than normal concrete, which ranges from 1400 to 1850 kg/m3 (ACI 213R) [1]. While density values generally show a decreasing trend along with decreasing mechanical properties. This type of lightweight concrete still needs to be improved in its application to elements that function but do not withstand loads (non-structural) due to its low mechanical properties. The main objective of producing lightweight concrete is its density. In contrast, another objective is the mechanical properties related to the use of lightweight concrete as a non-structural or structural material. Thus, physical properties in the form of density and mechanical properties in the form of compressive strength are important parameters in producing lightweight concrete. The mix method used in lightweight concrete is different from conventional concrete. The foaming agent used in manufacturing lightweight concrete will result in compressive strength and density results that are different from conventional concrete. In this study, lightweight concrete was made using the aerated technique: a foaming agent in aluminum powder and comprises cement, sand, fly ash, bottom ash, water, and superplasticizer. Fly ash as a substitute for cement and bottom ash as a substitute for sand with percentages of 0%, 15%, and 30%, and of 0%, 25%, and 50%, respectively. Those materials were aimed to optimize the composition of aerated concrete. The mix design was conducted with a density-based mix design of density targets of 1000 kg/m3, 1200 kg/m3, 1600 kg/m3, and 1800 kg/m3. The parameters used to assess the research results were slump value, setting time, density, compressive strength, and water absorption. While the consistency and stability values were found to be an indicator of the achievement of this density-based mix design. The performance indexes which demonstrate the attainment of compressive strength and predicted density in the aerated concrete, show that the mix designs meet the requirements of non-structural lightweight concrete. The mix of ingredients, particularly fly ash and bottom ash, has a considerable influence on the relationship between compressive strength and density in aerated concrete.

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Compressive strength performance of OPS lightweight aggregate concrete containing coal bottom ash as partial fine aggregate replacement

Cited by 20 publications

References 8 publications

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

Influence of densified silica fume on engineering properties of concrete containing coal bottom ash aggregate.

An investigation on optimizing the carbonation resistance of coal bottom ash concrete with its carbon footprints and eco-costs

The Effects of Fly Ash and Bottom Ash on the Properties of Aerated Concrete under Density-Based Mix Design

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