Biomass fly ash in concrete: Mixture proportioning and mechanical properties

Wang, Shuangzhen; Miller, Amber B.; Llamazos, Emilio; Fonseca, Fernando S.; Baxter, Larry

doi:10.1016/j.fuel.2007.05.026

Cited by 167 publications

(107 citation statements)

References 31 publications

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“…A severe reduction of consistency was reported [22] and results comparable to this [18,23]. The researchers attribute the increased water demand of woody biomass fly-ashes to either a higher specific surface of their irregularly-shaped particles or a higher content of unfired carbon.…”

Section: Results Of the Workability Testsmentioning

confidence: 55%

“…This may suggest the influence of a pozzolanic reaction from both fly-ashes. In other research the difference between 28 day and 90 days compressive strength of composites with the addition of woody biomass fly-ashes was not reported [18]. A comparable 6% gain of compressive strength of sawdust biomass fly-ash cement concrete was reported [22].…”

Section: Results Of the Compressive Strength Testsmentioning

confidence: 80%

“…Wood fly-ash has a bulk density ranging from 2.1 to 2.6 g/cm 3 . Its particles are irregular in shape and porous [17,18]. The d 50 size is about 110-150 µm.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical properties of cement composites can be enhanced with wood waste fly-ash with the replacement level up to 10% [19]. Other research suggests that a replacement of 25% of cement with wood waste fly-ash can result in similar compressive strength to coal fly ash up to 7 days from mixing which suggest a filler-effect [18]. An additional increase of strength between 28 day and 365 day compressive strength of concrete specimens was also reported [22], suggesting the presence of pozzolanic reaction.…”

Section: Introductionmentioning

confidence: 99%

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Utility assessment of biomass fly-ash for production of concrete products

2017

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International agreements oblige our state to develop ecological sources of energy, one of which is biomass. During its combustion fly-ashes are produced. Several studies have shown that they might be useful in concrete production. The article presents a comparison of biomass fly-ash and coal fly-ash influence on the properties of cement composites. The replacement levels of cement by fly-ash (FA) were 20%, 40% and 60%. Biomass fly-ash FA(B) have replaced coal fly-ash by 0%, 50% and 100%. The compressive strength tests showed similarities in strength development of coal and biomass fly-ashes concretes. Specimens with biomass fly-ash presented similar or better abrasion resistance comparing to coal fly-ash samples.Keywords: biomass fly-ash, cement, concrete Streszczenie Zobowiązania międzynarodowe obligują nasz kraj do produkcji energii z wykorzystaniem jej odnawialnych źródeł, jednym z nich jest biomasa. Podczas jej spalania powstają popioły lotne. Przeprowadzone dotychczas badania sugerują, że produkcja wyrobów betonowych może stanowić skuteczny sposób ich wykorzystania. Celem artykułu jest porównanie wpływu popiołu lotnego ze spalania biomasy i spalania węgla. Popioły (FA) stanowiły 20%, 40% lub 60% masy spoiwa. Popiół lotny z biomasy FA(B) dozowany był w ilości 0%, 50% lub 100% masy popiołów. Wyniki badań wytrzymałość na ściskanie wykazały podobny rozwój wytrzymałości betonów. Próbki z dodatkiem popiołów z biomasy charakteryzowały się zbliżoną lub większą odpornością na ścieranie od próbek z dodatkiem popiołów węglowych.Słowa kluczowe: popioły lotne ze spalania biomasy, cement, beton

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Section: Results Of the Workability Testsmentioning

confidence: 55%

Section: Results Of the Compressive Strength Testsmentioning

confidence: 80%

“…Wood fly-ash has a bulk density ranging from 2.1 to 2.6 g/cm 3 . Its particles are irregular in shape and porous [17,18]. The d 50 size is about 110-150 µm.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Utility assessment of biomass fly-ash for production of concrete products

2017

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“…However, a slight increase in the rate of hydration and a reduced setting time were observed. In addition, Wang et al [9]- [11] conducted a comprehensive study on the effects of biomass fly ash on the mixture proportioning, mechanical strength, and durability of concrete. It was found that the use of wood ash to partially replace cement in concrete substantially increased the water demand, the setting time, and the required dosage of air-entraining admixtures as well as compromised the long-term strength of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effects of Wood Ash on Properties of Concrete and Flowable Fill

Yang¹,

Huddleston²,

Brown³

2016

MSCE

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This research investigated the use of wood ash to partially replace cement or sand in conventional concrete, roller compacted concrete (RCC), and flowable fill. The main focus was to determine how the wood ash addition affected the main fresh and hardened properties of these materials. It was found that the wood ash could be successfully incorporated into the conventional concrete. In particular, the wood ash addition not only accelerated the setting, but also improved the early and the 28-day compressive strength of concrete that contained the blast furnace slag. It was also observed that the wood ash could be positively added into RCC to facilitate the compaction and reduce the risk of segregation. In addition, the wood ash can be beneficially introduced into the flowable fill mixtures to facilitate flow, to alleviate bleeding and subsidence, as well as to achieve controlled strength especially when combined with the class C or the class F fly ash.

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Biomass-Coal Cofiring: an Overview of Technical Issues

Baxter

2011

Solid Biofuels for Energy

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Biomass fly ash in concrete: Mixture proportioning and mechanical properties

Cited by 167 publications

References 31 publications

Utility assessment of biomass fly-ash for production of concrete products

Utility assessment of biomass fly-ash for production of concrete products

Effects of Wood Ash on Properties of Concrete and Flowable Fill

Biomass-Coal Cofiring: an Overview of Technical Issues

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