Influence of binders on properties of sintered fly ash aggregate

Ramamurthy, K.; Harikrishnan, K.

doi:10.1016/j.cemconcomp.2005.06.005

Cited by 150 publications

(64 citation statements)

References 12 publications

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“…This agent is usually cement and/or water glass. [14][15][16][17][18] In the first two processes a lot of energy is consumed, so that recently more effort has been put into investigations of cold-bonding processes.…”

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.

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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.

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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.

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“…Besides, it was demonstrated that the low heat transfer properties of lightweight aggregate concrete (LWAC) provided higher thermal insulation and had improved the fi re resistance. Manikandan, et al, ; Ramamurthy,et al, [4,5] investigated extensively the fl y ash based light weight aggregates with and without the addition of binders. Their studies showed that the properties of each type of aggregate was found to be different based on the type and amount of binders used.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Geopolymer Based Class-F Fly Ash Aggregates and its Composite Properties in Concrete

Gomathi¹,

Sivakumar²

2014

Archives of Civil Engineering

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This study explores the infl uence of alkali activators on the initiation of polymerization reaction of alumino-silicate minerals present in class-F fl y ash material. Different types of fl y ash aggregates were produced with silicate rich binders (bentonite and metakaolin) and the effect of alkali activators on the strength gain properties were analyzed. A comprehensive examination on its physical and mechanical properties of the various artifi cial fl y ash aggregates has been carried out systematically. A pelletizer machine was fabricated in this study to produce aggregate pellets from fl y ash. The effi ciency and strength of pellets was improved by mixing fl y ash with different binder materials such as ground granulated blast furnace slag (GGBS), metakaolin and bentonite. Further, the activation of fl y ash binders was done using sodium hydroxide for improving its binding properties. Concrete mixes were designed and prepared with the different fl y ash based aggregates containing different ingredients. Hardened concrete specimens after suffi cient curing was tested for assessing the mechanical properties of different types concrete mixes. Test results indicated that fl y ash -GGBS aggregates (30S2-100) with alkali activator at 10M exhibited highest crushing strength containing of 22.81 MPa. Similarly, the concrete mix with 20% fl y ash-GGBS based aggregate reported a highest compressive strength of 31.98 MPa. The fl y ash based aggregates containing different binders was found to possess adequate engineering properties which can be suggested for moderate construction works.

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“…Prior to vitrification, waste will require further Fine-grained scraps Mechanical surface treatment of metals [35] 10 Construction aggregates Construction and demolition of buildings [36] 11 Medical waste Sharps, organs and body parts, sanitary towels, bandages, reagents, drugs [37] 12 Sewage sludge Municipal and industrial water treatment [38] 13 Ash and slag From power plants and other energy facilities [39] 14 Sludges and filter cakes From machining of steel, aluminium, lead, zinc, copper and precious metals, and from electroplating and coating of metals [40] 15 Glass and ceramics From glassworks during glass processing and from households and industrial plants [41] 16 Cement, lime, and plaster From manufacture of mineral binders and from lime and cement industry [42] 17 Radioactive waste From production and processing of nuclear fuel and from the mining of uranium ore [43] 18 Asbestos waste From manufacture of textile articles, fibers, roof panels, water, and sewage pipes [44] More often, however, the vitrification process is carried out -particularly with hazardous waste -after mixing with various additives to facilitate the melting process to form a more homogeneous product [48]. For example, ash from coal mixed with powdered glass, feldspars, and aluminosilicates, and heated at 1450ºC.…”

Section: Vitrification Of Wastementioning

confidence: 99%

Using Vitrification for Sewage Sludge Combustion Ash Disposal

Borowski

2015

Pol. J. Environ. Stud.

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Influence of binders on properties of sintered fly ash aggregate

Cited by 150 publications

References 12 publications

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

Synthesis of Geopolymer Based Class-F Fly Ash Aggregates and its Composite Properties in Concrete

Using Vitrification for Sewage Sludge Combustion Ash Disposal

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