Use and effect of fly ash in concrete: A literature review
A type of fly ash increasingly used for engineering purposes is Vietnamese fly ash, which is used in optimal dosages of 10% and 20%, where an improvement in its mechanical property of flexu ral
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EFFECT OF FLY ASH ON PROPERTIES OF PERVIOUS CONCRETE …
The replacement of 10% of cement by fly ash revealed the greatest porosity, while the permeability decreased, from 0.211 cm/s for the reference concrete to 0.168 cm/s for the concrete with 10% fly ...
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Environmental impacts and the future prospects of waste …
Further studies have explored innovative plastic waste and fly ash combinations within concrete formulations. Ersan et al. [52], for instance, carefully investigated the effects of incorporating fly ash and recycled plastic waste into concrete on the environment. They used SimPro software to carefully assess the life-cycle implications, taking ...
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Status and prospects of Alternative Raw Materials in the …
• Austrian concrete industry has been demonstrating moderate average ARM content (50 kg/m3) and substitution ratio (2.1%) among all the other key countries with ca. 0.8 mio.t ARM utilization in 2020 • Main ARM in the Austrian concrete production has been fly ash • RMC/concrete ratio has remained stable since 2013 (at 70-74%) Future prospects
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Examining the endpoint impacts, challenges, and …
Fly ash has been widely used as a cement substitute to improve the sustainability of concrete. Although the advantages of fly ash have been extensively documented, there is a gap in...
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Prospect of Bangladeshi Fly Ash in Concreting Works
The experimental results showed that concrete with a 28-day compressive strength of 80 MPa could be obtained with a water-to-binder (w/b) ratio of 0.24, with a fly ash content of 45%. Such ...
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Prospects of Bulk Utilization of Fly Ash in Agriculture …
Figure 3. Mode of Fly ash utilization in 2011-12 in India. Characteristics of Fly Ash . The mineralogical, physical and chemical properties of fly ash (Adriano et al. 1980; Carlson and Adriano ...
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Progress and Prospect of Research on Comprehensive Utilization of Fly Ash
Fly ash is a kind of solid waste produced after coal combustion. After a long period of accumulation, it takes up a lot of land resources and causes serious environmental pollution problems. The comprehensive utilization of fly ash resources is becoming more and more important. The paper introduces the physicochemical properties and classification of fly ash in …
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Utilization of Fly Ash in Concrete: A State-of-the-Art Review
Fly ash is a popular mineral additive with a wealth of experimental data on its effect on concrete creep. The research study shows that using fly ash at a percentage of 12 or 30% …
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Physical, Mechanical and Structural Characteristics of Sulfur Concrete
Test samples of sulfur concrete were made from sulfur, fly ash, mineral aggregates and bitumen additive. The dosages of fly ash, sand and bitumen varied, while the content of sulfur and crushed stone remained constant. ... These advantages determine the prospects for using the developed composition of sulfur concrete in construction projects.
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Properties of Mass Concrete Containing Fly Ash at High …
This investigation is a study of the effect of high temperature on the structural properties of mass concrete containing fly ash. Tests were performed on cylinders exposed for periods of over 6 months to temperatures of 70 to 450 F (21.4 to 323 C). Preliminary results of the investigation show that temperatures have minor effect on both ...
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Comparison of environmental impacts of fly ash and slag as …
Fly ash and slag are among the most used wastes as supplementary cementitious materials (SCM) for partially replacing cement in concrete. Globally, these by-products are generated at a substantial scale, with fly ash production ranging from 900 to 1000 million tonnes and slag production from 140 to 330 million tonnes annually [15, 48].Herath et al. [22] reported …
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Effect of Fly Ash on Physical Properties of Concrete
The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations …
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Synergizing Portland Cement, high-volume fly ash and …
Over the past two decades, concrete manufacturing has experimented with various supplementary cementitious materials (SCMs) to enhance sustainability, performance, and durability [13] such as fly ash [14], corn cob ash [15], rice husk ash [16], metakaolin [8].These materials consume less than ordinary Portland cement, which is emission-intensive.
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Mechanical properties and chloride permeability of green concrete …
Fly ash (FA) and coal gangue (CG) are industrial wastes with large discharges. Their low comprehensive utilization results in a large accumulation, encroaching on cultivated land, generating dust and polluting water sources, but their high aluminum and silicon content means that they have the potential pozzolanic properties after being activated by grinding, …
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High Temperature Mechanical Properties of High-Strength Fly Ash …
Keywords: elastic modulus; fire resistance; fly ash concrete; high temperature properties; mechanical properties; polypropylene fibers. DOI: 10.14359/51684164. Date: 11/1/2012. Abstract: There is an increasing interest in the use of high-strength fly ash concrete (HFAC) due to growing environmental awareness.
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Comparison of environmental impacts of fly ash and slag as …
Results show that fly ash (164 kg CO 2 eq, 54% reduction) and GGBS (141 kg CO 2 eq, 61% reduction) reduce the global warming potential of pure-cement concrete (357 kg …
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Fly ash for sustainable construction: A review of fly ash concrete …
Fly ash for use in concrete: 2015: United Kingdom: BS EN 450-1: Fly ash for concrete. Definition, specifications and conformity criteria: 2012: BS EN 450-2: Fly ash for concrete. Conformity evaluation: 2005: PD CEN/TR 15840: Evaluation of conformity of fly ash for concrete. Guidelines for the application of EN 450-2: 2009: USA: ASTM C618
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Influence of recycled aggregates and high contents of fly ash …
Impact of fly ash content and fly ash transportation distance on embodied greenhouse gas emissions and water consumption in concrete Int. J. Life Cycle Assess., 14 ( 7 ) ( 2009 ), pp. 621 - 629 Crossref View in Scopus Google Scholar
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Sustainable Concrete Made with Ashes and Dust from
The fly ash is widely used as cement supplementary cementitious material in concrete. Initially fly ash was used in the ranges of 15% to 25% by mass of the cementitious material component in concrete. The recent research studies have shown that concrete with good strength and durability properties can be made with using high volumes of fly ash.
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A study on the effective utilization of ultrafine fly ash and …
Fly ash (FA) has long been the most accepted pozzolanic material for substituting cement in concrete. In typical applications, replacing up to 20% of the cementitious material …
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Effect of fly ash and metakaolin on pervious concrete properties
The curing conditions were found to be insignificant in affecting the properties of pervious concrete unlike fly ash and metakaolin. A 2% addition of metakaolin decreased porosity by 10%, while the optimum range of fly ash replacement in pervious concrete was found to be between 5 and 15%. ... Research findings and future prospects: a state-of ...
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(PDF) Compressive Strength of Concrete using Fly Ash and Rice Husk Ash
The data on the compressive strength of concrete after fly ash and rice husk ash had been added in percentage increments of 0%, 10%, 20%, 30%, 40%, 50% and 0%, 5%, 7.5%, 10%, 12.5%, 15% ...
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Properties of pervious concrete incorporating fly ash as …
Disposing fly ash in to landfill of coal fire power plant initiated environmental and health problems. A lot of researchers have conducted research to study the addition of fly ash (FA) as cement replacement in pervious concrete (PC). The aim of this paper was to review the impact of adding FA as partial substitution of cement in PC.
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Research status and prospects of bamboo-based cement concrete
Therefore, this paper reviews the research status of bamboo-based cement concrete, categorizing it into three aspects: bamboo reinforcement, bamboo fibers, and bamboo aggregate cement concrete. The results show that bamboo-based cement concrete has significant toughening effects, but research on durability is insufficient.
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EFFECTS OF FLY ASH ON CONCRETE …
Fly ash reduces the heat of hydration in concrete. A substitution of 30 per cent fly ash may result in a reduction of 50-60% heat of hydration. 9. On Air Entrainment. The presence of fly ash reduces the amount of air …
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Effect of Fly Ash on Setting Time
But many times fly ash is used in concrete as a cement replacement in combination with a water reducer. These concretes may set more slowly than a straight cement mix would. If fly ash is not being used as a cement replacement, but is added just to increase fines, it won't retard setting. It simply serves as an additional fine aggregate and ...
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Effect of class F fly ash on the durability properties of concrete
Class F fly ash contains a small quantity of lime. Thus, compressive strength is reduced with the increment of fly ash content in concrete. However, due to the pozzolanic activity of fly ash, the compressive strength increased in later stages of curing [4], [5].The amorphous silica present in fly ash undergoes a chemical reaction with the calcium hydroxide …
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Fly ash-based eco-friendly geopolymer concrete: A critical review …
Geopolymer concrete (GPC) is considered to be the next generation concrete due to its environmentally friendly benefit which eliminates the need of ordinary Portland cement (OPC) for the production of concrete, and subsequently, reducing the CO 2 emissions as well [7], [8]. GPC is produced by admixing sodium aluminosilicates such as fly ash, metakaolin, and …
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Properties of sustainable concrete containing fly ash, slag …
Concrete with 50% fly ash had relatively poor performance for the materials and mix proportions used in this study and it is recommended that such mixes be thoroughly tested before use in construction projects. Previous article in issue; Next article in issue; Keywords. Fly ash. Blast furnace slag.
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