Ash from timber waste as cement replacement material

Elinwa, Augustine Uchechukwu; Mahmood, Yakubu Abba

doi:10.1016/s0958-9465(01)00039-7

Cited by 210 publications

(99 citation statements)

References 3 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 Testssupporting

confidence: 60%

“…A 15% replacement of cement with sawdust fly-ash in concrete binder can reduce the slump test result by 32%. Other results suggest that an addition of 10% of woody fly-ash to the binder has no adverse effect on water demand of cement mortar [19,23,24]. Self-compacting mortars with addition of 10% of wood waste fly-ash can exhibit compressive strength higher than cement control mortars up to 90 days after mixing [25].…”

Section: Introductionmentioning

confidence: 96%

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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 Testssupporting

confidence: 60%

Section: Introductionmentioning

confidence: 96%

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

2017

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“…Ramos et al [8] reported compressive strength similar to a reference for prisms with 10% and 20% cement replacement with WA from wood fired at high temperature. Works performed with WA from small burning facilities [11][12][13] all found that WA as a partial cement replacement material in mortar at all levels of cement replacement (between 5% and 30%) reduced the compressive strength. Thus literature reports results where cement replacement with WAs did not result in strength loss and in other cases strength loss was seen even at 5% replacement.…”

Section: The Development In Compressive Strength 7-28 Daysmentioning

confidence: 99%

Wood ash used as partly sand and/or cement replacement in mortar

Ottosen¹,

Hansen

Jensen³

et al. 2016

Int. J. SDP

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Wood ash (WA) is the residue generated during incineration of wood and wood products. The WAs in focus of this work are from incineration of virgin wood. Physical and chemical properties of WA vary significantly depending on many factors related to the wood species and the incineration process, and the present work reports a characterization of three different WAs. Properties of mortar samples with the WAs used as partly cement and/or sand replacement are reported. Compressive strength development and porosity are the mortar properties in focus. The overall aim of the work is to evaluate the influence from the differences in ash characteristics to the properties of the mortar samples. The characteristics of the ashes did vary considerably. For example, one ash had very high loss on ignition (LoI) of 14% compared to 3% for the other ashes. Ash solubility in water ranged from 18% to 28%. Two of the ashes were dry and sampled just after the incineration, whereas one ash had a water content of 15%, because the ash was sprayed with water to avoid dust during ash handling at the incineration plant. Regardless of replacing cement or sand with WAs, the compressive strength decreased compared to a reference without ash, however, the decrease was small for two of the ashes. Using the ash with the high LoI resulted in significantly lower compressive strength compared to the other two ashes. The mortar samples with two of the ashes (with low LoI) had qualities, which were very encouraging in order to use WA as partly cement replacement (<10%). At higher percentages the workability was so low that extra water needed to be added and the results depended on the water:cement ratio rather than the ash mass.

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“…The need of reducing the carbon foot print associated to cement production drove much research towards the study of by-products to be used as supplementary cementitious materials (SCMs). Many previous researches [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] undertaken obtained valuable results to use the industrial wastes in various forms of concrete production. For instance, the use of waste rubber, glass powder, and rice husk ash in concrete mix or cement mortar has received conscribe attention over the past years.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the use of waste rubber, glass powder, and rice husk ash in concrete mix or cement mortar has received conscribe attention over the past years. Some researches carried out in the past used wood ash wastes as a replacement for cement in concrete mixes [1,2]. Significant research has been directed towards the utilization of rice husk ash (RHA) as SCM [3].…”

Section: Introductionmentioning

confidence: 99%

Pridiction of Compressive Strength of Cement By Using Regression Technique with Partial Replacement of Hylam Powder in Cement Mortar

Kallutla¹,

Sreenivasulu²,

Sashidhar³

2016

CiVEJ

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This paper presents the comparison of results i.e., (compressive strength of cement) by the experimental study and Regression model to evaluate the possibility of utilizing the hylam powder as a partial replacement in cement mortar. The remarkable increase in the production of hylam and its disposal in an ecofriendly manner is increasingly becoming a matter of global concern. Hylam powder is a waste produced from hylam sheets at the time of fabrication (Cutting, Making holes and polishing process) is used as a partial replacement in cement. A total 63cement cube were casted and tested for 3,7& 28days of seven mortar mix (i.e. 0%, 3%, 5%, 7%, 10%, 13% & 15% of Hylam powder was replaced by weight of cement). The results show that incorporation of the hylam powder yields to the increase of strength at the age (28 days) in comparison with that of a control mortar.

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Ash from timber waste as cement replacement material

Cited by 210 publications

References 3 publications

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

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

Wood ash used as partly sand and/or cement replacement in mortar

Pridiction of Compressive Strength of Cement By Using Regression Technique with Partial Replacement of Hylam Powder in Cement Mortar

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