Utilization of fly ash by pelletization process; theory, application areas and research results

Baykal, Gökhan; Doven, Ata G.

doi:10.1016/s0921-3449(00)00042-2

Cited by 200 publications

(90 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of these facts, more and more scientists have been trying to find new ways in which such ash could be used, e.g., for the development of alkali-activated materials, which are frequently named geopolymers 2,3 , but also for the production of artificial aggregates. [4][5][6][7][8][9][10][11][12][13] Artificial aggregates can be obtained simply by the crushing and grinding of industrial waste if the basic starting material is bulk waste. If, however, the basic starting material is a fine powder, such as fly ash, such aggregate can be produced by several different routes, as follows: 1) by high-temperature procedures, e.g., foaming and/or sintering at elevated temperatures of approx.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lightweight aggregates made from fly ash using the cold-bond process and their use in lightweight concrete

Frankovič¹,

Bosiljkov²,

Ducman³

2017

Mater. tehnol.

View full text Add to dashboard Cite

Aggregates made from fly ash have been developed by means of the cold-bonding process, with the addition of Portland cement as a binder at (10, 20, and 30) % of mass fractions, and by pouring the mixtures into moulds. After curing for 28 d the samples were processed into aggregate by crushing and sieving. An aggregate containing a weight percentage of 10 % of cement was additionally produced by pelletization on a granulating plate. The density, water-adsorption capacity, porosity, compressive strengths, and frost resistance of the samples were determined. The aggregates prepared by both routes were then used to make concrete samples, whose properties were then compared to those of conventional concrete made using limestone aggregate. The compressive strength of the concrete made with the granulated aggregate reached 16.0 MPa after 28 d, whereas that of the concrete made with crushed aggregate amounted to 24.1 MPa, and that of the conventional concrete was 34.6 MPa. Keywords: fly ash, lightweight aggregates, density, compressive strength, frost resistance Agregati izdelani iz elektrofiltrskega pepela so bili razviti s postopkom hladnega vezanja, z dodatkom (10, 20 in 30) % masnega dele`a Portland cementa kot veziva in z ulivanjem me{anice v modele. Po 28 dnevnem strjevanju vzorcev so bili vzorci predelani v agregat z drobljenjem in sejanjem. Sestava, ki je vsebovala 10 masnih % cementa, je bila {e dodatno peletizirana na plo{~i za granuliranje. Dolo~ene so bile: gostota, kapaciteta absorpcije vode, poroznost, tla~na trdnost in odpornost na zamrzovanje. Sestave, izdelane na oba na}ina, so bile uporabljene za izdelavo betonskih vzorcev, katerih lastnosti so bile primerjane z lastnostmi obi~ajno izdelanega betona z uporabo sestave apnenca. Tla~na trdnost betona, izdelanega z granulirano sestavo, je dosegla 16,0 MPa po 28 dneh, medtem, ko je pri betonu izdelanem iz drobljenega agregata, zna{ala 24,1 MPa, pri obi~ajnem betonu pa je bila 34,6 MPa.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The efficiency of granulation depends on the fineness of the fly ash, speed and time of rotation of the plate, as well as its inclination and the diameter of the plate 8,12,15,19 . From the point of view of costs, another more favourable method exists, in which there is no need for a pelletization plate, or for dry waste powder.…”

Section: Introductionmentioning

confidence: 99%

Lightweight aggregates made from fly ash using the cold-bond process and their use in lightweight concrete

Frankovič¹,

Bosiljkov²,

Ducman³

2017

Mater. tehnol.

View full text Add to dashboard Cite

show abstract

“…Arti ficial LW As can be formed by rapid heating at high temperatures of materials that have the ability to expand. Their origin can be: (i) nat ural sources such as volcanic rocks [2,3] and/or sedimentary rocks [4] and (ii) thermal treatment of waste materials and/or industrial by-products, such as mining wastes [5,6] and fly ash [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mineralogy of lightweight aggregates produced from washing aggregate sludge, fly ash and used motor oil

González-Corrochano

Alonso-Azcárate

Rodas

et al. 2010

Cement and Concrete Composites

View full text Add to dashboard Cite

“…The addition of lime and cement affect the physical properties of the fly ash cold bonded aggregates. The water absorption of the fly ash aggregates is decreased by 4-9 %with addition of lime and cement [12]. The water absorption turns out to be lower if the cement content is increased because of the high rate of the pozzolanic reaction produce calcium silicate hydrate making the structure more dense [22].…”

Section: Water Absorptionmentioning

confidence: 99%

“…These changes are due to increases coalescence process of the particle up to a limit value [11]. The sintering method required high energy, but has high engineering properties depending on agglomerated material properties and process efficiency [12]. There are also fly ash aggregate that using the 2 steps of thermal treatment where the first at 750 0 C for 10 -15 minutes and second the expansion step at 1150 0 C-1175 0 C for 10-15 minutes [6].…”

Section: Sinteringmentioning

confidence: 99%

A Review on the Manufacturing of Lightweight Aggregates Using Industrial By-Product

et al. 2016

View full text Add to dashboard Cite

Abstract:The waste materials from industrial are one of the concern issues in sustainable development. Recycle and reduce the waste material is one of the strategies to produce the better sustainable system. One of the methods is by using the waste materials to produce artificial aggregate. There are wide applications of artificial aggregate, for instance construction, agriculture, geotechnical fill, waste water, drainage and many more. Physical properties such as bulk density, specific gravity, unit weight, porosity and water absorption are important criteria. The performance of the artificial aggregate varies, depending on the application.

show abstract

Utilization of fly ash by pelletization process; theory, application areas and research results

Cited by 200 publications

References 1 publication

Lightweight aggregates made from fly ash using the cold-bond process and their use in lightweight concrete

Lightweight aggregates made from fly ash using the cold-bond process and their use in lightweight concrete

Microstructure and mineralogy of lightweight aggregates produced from washing aggregate sludge, fly ash and used motor oil

A Review on the Manufacturing of Lightweight Aggregates Using Industrial By-Product

Contact Info

Product

Resources

About