Development of sintered aggregate derived from POFA and silt for lightweight concrete

Kwek, Shi Ying; Awang, Hanizam; Cheah, Chee Ban; Mohamad, Hasmaliza

doi:10.1016/j.jobe.2022.104039

Cited by 13 publications

(14 citation statements)

References 40 publications

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“…Furthermore, the application of lightweight aggregate in concrete has been developed in order to resolve the depletion of natural aggregate. Due to its advantages in decreasing load bearing and also improving performance in thermal insulation, the development of lightweight concrete by including lightweight aggregates has caught researchers’ attention [ 16 ].…”

Section: Aggregatementioning

confidence: 99%

Artificial Lightweight Aggregates Made from Pozzolanic Material: A Review on the Method, Physical and Mechanical Properties, Thermal and Microstructure

et al. 2022

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As the demand for nonrenewable natural resources, such as aggregate, is increasing worldwide, new production of artificial aggregate should be developed. Artificial lightweight aggregate can bring advantages to the construction field due to its lower density, thus reducing the dead load applied to the structural elements. In addition, application of artificial lightweight aggregate in lightweight concrete will produce lower thermal conductivity. However, the production of artificial lightweight aggregate is still limited. Production of artificial lightweight aggregate incorporating waste materials or pozzolanic materials is advantageous and beneficial in terms of being environmentally friendly, as well as lowering carbon dioxide emissions. Moreover, additives, such as geopolymer, have been introduced as one of the alternative construction materials that have been proven to have excellent properties. Thus, this paper will review the production of artificial lightweight aggregate through various methods, including sintering, cold bonding, and autoclaving. The significant properties of artificial lightweight aggregate, including physical and mechanical properties, such as water absorption, crushing strength, and impact value, are reviewed. The properties of concrete, including thermal properties, that utilized artificial lightweight aggregate were also briefly reviewed to highlight the advantages of artificial lightweight aggregate.

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Section: Aggregatementioning

confidence: 99%

Artificial Lightweight Aggregates Made from Pozzolanic Material: A Review on the Method, Physical and Mechanical Properties, Thermal and Microstructure

et al. 2022

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“…Common industrial by-products such as fly ash, palm oil waste, blast furnace slag, ferrochrome slag, and silica fumes have the potential to cause land shortages for trash disposal and boost the cost of waste treatment or disposal [ 13 , 51 ]. As a result, using these resources in concrete reduces waste generated by the respective industries as well as the carbon footprint of concrete manufacturing.…”

Section: Geopolymers As Artificial Aggregatesmentioning

confidence: 99%

“…Numerous studies have been carried out in order to evaluate the effectiveness of the sintering process towards aggregates produced as tabulated in Table 3 . For instance, Kwek et al [ 13 ] carried out a sintering process for the production of artificial aggregates made from palm oil fly ash (POFA). During the sintering process, preheating at 400 °C was applied prior to sintering at 1150 °C in order to avoid sudden expansion, which leads to cracking due to the high heat supply, thus negatively affecting the properties of the aggregates formed.…”

Section: Processing and Producing Geopolymer-based Artificial Aggregatesmentioning

confidence: 99%

“…In the meantime, towards focusing on sustainability and saving the environment, artificial aggregates, as an emerging technology, is a viable option for generating both fine and coarse aggregates, which can meet the demand for waste recycling and mass production. The potential of industrial wastes to be utilized as raw materials for producing artificial aggregates include coal fly ash [ 12 ], palm oil fly ash [ 13 ], and bottom ash [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, for producing artificial aggregates with enhanced properties that are comparable to those of natural aggregates, the processing and producing methods should be focused on. Sintering [ 13 , 15 ] and cold bonding [ 16 , 17 ] are two well-known techniques for producing artificial aggregates. Sintering is heavily dependent on the application of a high temperature, which is often greater than 1000 °C for the crystallization of raw materials.…”

Section: Introductionmentioning

confidence: 99%

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Geopolymer-Based Artificial Aggregates: A Review on Methods of Producing, Properties, and Improving Techniques

et al. 2022

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The depletion of aggregate-related natural resources is the primary concern of all researchers globally. Recent studies emphasize the significance of recycling and reusing various types of natural or by-product material waste from industry as a result of the building industry’s rising demand for aggregate as the primary component in concrete production. It has been demonstrated that the geopolymer system has exceptional features, such as high strength, superior durability, and greater resistance to fire exposure, making it a viable alternative to ordinary Portland Cement (OPC) concrete. This study will examine the present method utilized to generate artificial aggregate-based geopolymers, including their physical and mechanical properties, as well as their characterization. The production process of geopolymer derived from synthetic aggregates will be highlighted. In conjunction with the bonding of aggregates and the cement matrix, the interfacial transition zone (ITZ) is highlighted in this work as an additional important property to be researched in the future. It will be discussed how to improve the properties of geopolymers based on artificial aggregates. It has been demonstrated that cold bonding provides superior qualities for artificial aggregate while conserving energy during production. The creation of ITZ has a significant impact on the bonding strength between artificial aggregates and the cement matrix. Additionally, improvement strategies demonstrate viable methods for enhancing the quality of manufactured aggregates. In addition, other recommendations are discussed in this study for future work.

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Cutting Edge Approaches on Synthesis of Artificial Aggregates for Infrastructure Development

Praveen,

Sagar,

Ramu

et al. 2024

Lecture Notes in Civil Engineering

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Development of sintered aggregate derived from POFA and silt for lightweight concrete

Cited by 13 publications

References 40 publications

Artificial Lightweight Aggregates Made from Pozzolanic Material: A Review on the Method, Physical and Mechanical Properties, Thermal and Microstructure

Artificial Lightweight Aggregates Made from Pozzolanic Material: A Review on the Method, Physical and Mechanical Properties, Thermal and Microstructure

Geopolymer-Based Artificial Aggregates: A Review on Methods of Producing, Properties, and Improving Techniques

Cutting Edge Approaches on Synthesis of Artificial Aggregates for Infrastructure Development

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