Performance of Sintered Pozzolanic Artificial Aggregates as Coarse Aggregate Replacement in Concrete

Razak, Rafiza Abd; Abdullah, Mohd Mustafa Al Bakri; Kamarudin, Hussin; Subaer,; Yahya, Zarina; Raiss, Mohamed; Abdullah, Abdul Rahman

doi:10.1007/978-981-33-4918-6_10

Cited by 4 publications

(7 citation statements)

References 25 publications

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“…The sintering parameters include the sintering temperature effect as well as sintering duration. Similar to the manufacturing process of cold bonding, the fundamental production process of sintered artificial aggregates consists of three stages; mixing process of raw materials, pelletization or granulation process, and hardening process through sintering at high temperature [ 87 , 88 ]. Regardless of energy consumption, sintering is commonly denoted as a time-saving hardening process since the duration of sintering usually takes around 1 h for pre-heating and the sintering process.…”

Section: Processing and Producing Geopolymer-based Artificial Aggregatesmentioning

confidence: 99%

“…Incorporating geopolymer also adds to homogeneous pore distribution and allows for the production of lightweight aggregates at lower temperatures [ 88 ]. Thus, it is considered that artificial aggregates with a geopolymer comprising volcanic ash as the principal component improve the qualities of aggregate produced at temperatures below 1000 °C.…”

Section: Processing and Producing Geopolymer-based Artificial Aggregatesmentioning

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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Section: Processing and Producing Geopolymer-based Artificial Aggregatesmentioning

confidence: 99%

Section: Processing and Producing Geopolymer-based Artificial Aggregatesmentioning

confidence: 99%

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

et al. 2022

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“…Geopolymers are binding substances that differ from ordinary Portland cement (OPC) and are generated by activating silica and alumina-containing source materials (pozzolanic materials) with alkali solutions. This results in sodium aluminosilicate hydrate (N-A-S-H) gel or calcium aluminosilicate hydrate (C-A-S-H) gel products, which trigger the geopolymers’ hardening mechanism and produce materials with exceptional structural integrity and durability with the added benefit of lower greenhouse emissions [ 73 , 74 ]. By creating geopolymer construction composites with a lower carbon footprint, it is hoped that the growing concerns about global warming caused by emissions of carbon dioxide (CO 2 ), a key greenhouse gas, from the ordinary Portland cement industry can be lessened [ 12 , 14 ].…”

Section: Sustainability Of Diatomaceous Earth As a Concrete Productio...mentioning

confidence: 99%

“…The fundamental processes of geopolymerization, presented in Figure 3 , are the dissolution of solid aluminosilicate oxide in an M–OH solution, where M is an alkali metal (mostly Na and K); the dissolution of Al and Si complexes in an interparticle space; the formation of a gel phase by polymerization between silicate solution and Al and Si complexes; and the hardening of the formed gel phase at the end [ 73 , 76 ].…”

Section: Sustainability Of Diatomaceous Earth As a Concrete Productio...mentioning

confidence: 99%

“…The interaction of solid aluminosilicates with a highly concentrated aqueous alkali hydroxide or silicate solution yields a synthetic alkali aluminosilicate substance known as a geopolymer, also known as an inorganic polymer or alkali-activated binder, with unique properties and characteristics, including a high compressive strength, high-temperature stability, and low thermal conductivity [ 73 , 76 ]. Sodium and potassium-based alkali activators are the most commonly used alkali activators, that is, a combination of sodium silicate (Na 2 SiO 3 ) or potassium silicate (K 2 SiO 3 ) and sodium hydroxide (NaOH)or potassium hydroxide (KOH) [ 85 ], although a combination of Na 2 SiO 3 and NaOH have been widely used as activators in previous studies [ 76 , 86 ].…”

Section: Sustainability Of Diatomaceous Earth As a Concrete Productio...mentioning

confidence: 99%

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A Review on the Incorporation of Diatomaceous Earth as a Geopolymer-Based Concrete Building Resource

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The development of geopolymer building composites at a lower cost with a smaller carbon footprint may lessen the growing concerns about global warming brought on by emissions of a critical greenhouse gas (CO2) paired with the high production costs in the cement sector. Diatomaceous earth, commonly used as an admixture or partial replacement of cement owing to its most effective pozzolanic properties, has been investigated as a precursor in geopolymer concrete development. Several studies have been examined to develop a greater understanding of its characterization, inclusion status, and impacts on the performance aspects of concrete. The literature review showed that using diatomaceous earth is one of the effective ways to create sustainable, insulating, lightweight building materials while minimizing the harmful economic and environmental effects of industrial solid wastes. However, since most studies have focused on its integration as a partial cement substitute or a replacement for fine aggregate, further research on diatomaceous earth-based clinker-free concrete is required. A lack of research on geopolymer concrete’s reinforcement with either natural or synthetic fibers, or a combination of the two, was also discovered. This review also showed that there has been remarkably little effort made towards theoretical property correlation modeling for predicting concrete performance. It is anticipated that the detailed overview presented herein will guide potential researchers in defining their future paths in the study area.

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Effects of Kortta fibres and microsilica on the mechanical properties of lightweight concrete in oil product environments

Jafari¹,

Rezaei²

2023

ACAE

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Crude oil and its products are strategic and vital goods for most countries in the world. It is necessary to store these products in the production and transfer chain and send them to refineries, ports, and airports for military and national purposes. Lightweight concrete is propounded as a useful replacement for normal concrete due to its low specific weight and acceptable resistance property; however, compared to normal concrete, it is considered to be more permeable, less durable, and less resistant. Therefore, in this study, the reliability of this synthetic material in oil conditions has been investigated. In this regard, two groups of samples were investigated under normal and oil environmental conditions, polymer Kortta fibres with percentages of 0; 0,5; 1,0; 1,5; and 2,0 % and microsilica with percentages of 0 and 15 % by cement weight were incorporated alone and combined. Subsequently, tests were performed on the specimens after 90 days. The results showed that the combination of microsilica and Kortta fibres causes a significant increase in lightweight concrete strength and impermeability.

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Performance of Sintered Pozzolanic Artificial Aggregates as Coarse Aggregate Replacement in Concrete

Cited by 4 publications

References 25 publications

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

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

A Review on the Incorporation of Diatomaceous Earth as a Geopolymer-Based Concrete Building Resource

Effects of Kortta fibres and microsilica on the mechanical properties of lightweight concrete in oil product environments

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