Effect of coal bottom ash as partial replacement of sand on workability and strength properties of concrete

Singh, Mandeep; Siddique, Rafat

doi:10.1016/j.jclepro.2015.08.001

Cited by 193 publications

(74 citation statements)

References 9 publications

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“…Water-to-cement ratio was therefore raised, leading to an increase of concrete slump value. A similar result was also reported by Singh and Siddique (2016) that highly absorption materials (e.g., coalbottom ash) can act as a water reservoir and could raise the final w/c ratio of concrete mixtures [12].…”

Section: Slump Testsupporting

confidence: 87%

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

Suwan

Wattanachai

2017

Advances in Materials Science and Engineering

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Global warming is a vital issue addressed to every sector worldwide, including the construction industry. To achieve the concept of green technology, many attempts have been carried out to develop low-carbon footprint products. In the construction sector, Autoclaved Aerated Concrete (AAC) has become more popular and been manufactured to meet the construction demand. However, errors from manufacturing process accounted for approximately 3 to 5% of the AAC production. The development of AAC waste as lightweight aggregate in concrete is one of the potential approaches which was extendedly studied in this paper. The results showed that the compressive strength of AAC-LWA concrete was decreased with an increase in volume and coarse size. The optimum mix proportion was the AAC aggregate size of 1/2 to 3/8 with 20 to 40% replacement to normal weight aggregate. Internal curing by AAC-LWA was also observed and found to provide sufficient water inside the specimens, leading to an achievement in higher compressive strength. The main goal of this study is not only utilising unwanted wastes from industry (recycling of waste materials) but also building up a new knowledge of using AAC-LWA as an internal curing agent as well as the production of value-added lightweight concrete products.

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Section: Slump Testsupporting

confidence: 87%

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

Suwan

Wattanachai

2017

Advances in Materials Science and Engineering

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“…However, bottom ash is a suitable material to substitute sand in a concrete mixture. The use of 100% bottom ash can be applied to concrete where the workability can be ignored, e.g., in the making of paving concrete [6,7]. Currently, the bottom ash of the power plant is only stockpiled in ash pond in plant location while almost 100% of the fly ash is used by various ready mix plants around East Java to make concrete.…”

Section: Introductionmentioning

confidence: 99%

The use of bottom ash for replacing fine aggregate in concrete paving blocks

et al. 2017

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Abstract. Bottom ash that results from coal burning for electrical generation is still much underutilized in Indonesia and it is necessary to increase the usage of this waste. The manufacture of paving blocks using bottom ash, which is normally associated with high water absorption due to its high porosity and carbon content, was examined in this study with the aim to increase the usage of this waste material. The study was done in three phases: (1) the mixture of cement and bottom ash passing sieves of 2 and 5 mm were done with ratios of 1:3, 1:4, and 1:5; from the best proportion, fly ash was used to replace the cement material from 10-80%, and (3) samples with 30% and 50% fly ash replacement ratios were used in combination with 5 mm and 10 mm sieved bottom ash. Compressive strength, water absorption, and abrasion resistance tests were conducted to assess the properties of the resultant paving block. From the result, bottom ash is used to replace natural sand in making paving blocks. By optimizing the particle packing density and using fly ash as a cement replacement, the compressive strength of paving blocks can exceed 40 MPa.

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“…Fly ash is one of the well-known coal combustion products where it is usually used in concrete mixtures as blended cement, besides fly ash were also known as as supplementary cementitious material for increasing the workability and durability of concrete [10][11][12][13] [48][49]. On the other hand, other researchers have classified bottom ash as industrial waste that have been produced at the bottom of coal furnace during the coal combustion for electricity generation.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on the Properties of Coal Bottom Ash in Concrete as Sound Absorption Material

et al. 2017

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Abstract. The government is currently implementing policies to increase the usage of coal as fuel for electricity generation. At the same time, the dependency on gas will be reduced. In addition, coal power plants in Malaysia produce large amounts of industrial waste such as bottom ash which is collected in impoundment ponds (ash pond). However, millions of tons of coal ash (bottom ash) waste are collected in ponds near power plant stations. Since bottom ash has been classified as hazardous material that threatens the health and safety of human life, an innovative and sustainable solution has been introduced to reuse or recycle industrial waste such as coal bottom ash in concrete mixtures to create a greener and more sustainable world. Bottom ash has the potential to be used as concrete material to replace fine aggregates, coarse aggregates or both. Hence, this paper provides an overview of previous research which used bottom ash as fine aggregate replacement in conventional concrete. The workability, compressive strength, flexural strength, and sound absorption of bottom ash in concrete are reviewed.

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Effect of coal bottom ash as partial replacement of sand on workability and strength properties of concrete

Cited by 193 publications

References 9 publications

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

The use of bottom ash for replacing fine aggregate in concrete paving blocks

A Comprehensive Review on the Properties of Coal Bottom Ash in Concrete as Sound Absorption Material

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