Urbanization has significantly driven the growing demand for concrete, which, according to recent statistics, is the most widely consumed material after water, with an annual global consumption of approximately 30 billion tonnes [1].Natural aggregate, as the main raw material of concrete components (about 70–80 % by volume [2]), is facing issues of over-exploitation [3] due to …
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In the study of Punlert et al. (2017) [], lightweight concrete was manufactured using fly ash lightweight aggregates instead of coarse aggregates, resulting in a much lower density and good strength compared to conventional concrete.Furthermore, when sintered at around 1100 °C, lightweight aggregate made from sewage sludge and river sediment achieved high density, …
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Those are: - mixing of raw materials - agglomeration - hardening or binding of the fly ash particles - further processing Figure 1 shows these process steps in more detail. The main differences between the various fly ash aggregate processes concern the method of agglom- eration and the way of hardening.
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New Technologies to Produce Artificial Aggregates Have the Potential to Dramatically Mitigate Manmade Emissions of Carbon Dioxide and Help Close the Circular Economy Loop. Blue Planet's synthetic limestone …
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The principal processing techniques used in aggregate production (crushing, screening, and washing) are described. Then, this chapter describes the properties of aggregates and their associated tests, organized them into five main groups: general, geometrical, mechanical and physical, thermal and weathering, and chemical properties and tests.
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In this study, waste silica from Alborz silica mineral processing factory was recycled as raw material for the production of a novel artificial stone to be used in civil construction. The size of the waste materials of this plant is less than 100 microns. Waste silica powder was mixed with unsaturated polymer resins as a binder. Under pressure, vibration and …
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PRODUCTION PROCESS 1. Extraction - With the exception of slag and other manufactured aggregate most materials for aggregate production come from bedrock or unconsolidated deposits. The vast majority of materials used in the mineral aggregate industry are obtained from surface-mined stone quarries or from sand and gravel pits.
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Therefore, this article proposes a method of obtaining artificial lightweight aggregate consolidated using two methods: drum and dynamic granulation. Hardening was …
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Such aggregates include cold-bonded AAA (CB-AAA) and sintered AAA (ST-AAA), which will be the main target of this article. The feasibility of ST-AAA has ... Manufacturing process: Further processing: Ref: 2007: 91% CFA, 9% cement ... The crushing method of hardened pastes is the most suitable for large-scale artificial aggregate production in ...
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The first stage of aggregate processing involves quarrying where a large deposit of desirable aggregate is identified and extracted from the ground. Hardened substances are either blasted or cut into smaller manageable-sized rubble and transported by truck or conveyor belts to the processing area.
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The main component of RCP is hydrated mortar, which has been carbonated and polluted for a long time, resulting in very little active substance content [13], making it a low-activity solid waste.Jianzhuang Xiao [14] studied the mechanical properties of recycled powder concrete (RPC) and found that as the amount of recycled powder increased, the mechanical …
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Integrating geo-polymers in concrete necessitates the incorporation of the geo-polymerization process in artificial aggregate production, employing crushed geo-polymer paste of the suitable grade. Before application and processing, it is imperative to discern the attributes of geo-polymer-based artificial aggregates.
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This study evaluated the environmental impact of landfill, incineration, and lightweight aggregate production for sewage sludge management techniques and compared the utilization of sewage-produced lightweight aggregates with natural aggregates in terms of building material production. Two scenarios were established for the life cycle assessment (LCA) of the sludge and …
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The main objective of this study is to produce eco-friendly coarse aggregate from recycled waste materials such as GGBFS and fly ash with an alkaline activator[sodium silicate Na 2 SiO 3 and 8 M of sodium hydroxide (NaOH) Na 2 SiO 3 /NaOH ratio = 2:1 with water as an alternative bond material through the pelletizing process [artificial green ...
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In the construction sector, the material supply chain of aggregates is frequently disturbed due to seasonal unavailability, quarrying issues, and environmental norms. The production of artificial aggregates has gained prominence to conserve natural resources and promote green construction practices. The current study encompasses the production of alkali …
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AA can be strengthened by optimizing the production process during its pelletization and hardening. ... including the selecting and processing of raw materials, the use of additives, molding and curing, and surface treatment. ... Recent advances in artificial aggregate production. J. Clean. Prod. (2021)
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Artificial aggregates (AAs) are usually prepared by pelletizing techniques that combine fine moisturizing particles into larger ones. The fresh manufactured pellets can be turned into a …
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In this study, 3D technology was adopted to prepare artificial aggregates with specific shapes for the purpose of making the properties of artificial aggregates to be …
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This article provides an overall review of the manufacturing process and engineering properties of two types of artificial aggregates, cold-bonded AAA (CB-AAA) and sintered AAA …
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The effect of the pH of the reaction solution on the crystallization process and the ettringite morphology is theoretically substantiated and experimentally proved.
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Currently, the practical methods for artificial aggregate production are mainly divided into sintering and cold bonding. ... The main raw materials used in this study were CSA and CSW. CSA uses corn straw produced by ordinary farmer s in Jilin, China. ... The production process of CSA was described in four steps as shown in the yellow ...
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The purpose of this study is to manufacture lightweight aggregates for the recycling of water treatment sludge (WTS), to identify the physical properties of the aggregates, and to present a means by which to utilize the manufactured lightweight aggregates. The chemical composition and thermal properties were examined via a raw materials analysis. The …
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Concrete is currently the most widely used construction material in the world [1].Fine and coarse aggregates are important components of concrete, accounting for about 60%–70 % of the volume of concrete [2].Due to environmental protection and the consumption of resources, natural aggregate is gradually becoming scarce, resulting in a sharp increase in the …
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Generally, this process involved grinding solid waste into the fine powder, granulation, and then exposing to a CO 2-rich environment for carbonation. Artificial aggregates modified through accelerated carbonation exhibit improved volume stability, enhanced mechanical properties, and permanently sequester CO 2.
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Four types of artificial aggregates have been produced by varying the proportions of fly ash and cement as 90:10, 85:15, 80:20, and 75:25. The physicomechanical characteristics of produced …
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tion of aggregates; subsequent sections will cover sources and production processes necessary to produce aggregate materials and the sampling tech-niques required to obtain representative results. Origin Many properties of an aggregate derive from its parent rock: physical and mechanical properties such as relative density, strength, stiffness ...
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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 …
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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 ...
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