Effects of the Incorporation of Sawdust Waste Incineration Fly Ash in Cement Pastes and Mortars

Elinwa, Augustine Uchechukwu; Ejeh, Stephen

doi:10.3130/jaabe.3.1

Cited by 77 publications

(41 citation statements)

References 8 publications

(3 reference statements)

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“…Moreover it is possible that part of LOI may be attributed to CaCO 3 in the ash which has been found in other types of ash obtained from agroindustrial waste. In fact calcium carbonate was confirmed by XRD in sawdust ash by 21 and in forest waste ash by 22 . Poykio et al 23 also state that calcium carbonate in a high percentage is typically observed in forest waste ash and that although Loss of Ignition is widely attributed to the amount of combustible matter in the sample (especially for coal fly ash), it may not represent rightly the amount of unburnt carbon in ash but rather the volatile fraction 23 .…”

Section: Chemical and Physical Properties Of Cpamentioning

confidence: 82%

Strength and Durability of Mortar Using Cork Waste Ash as Cement Replacement

2014

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Cork powder, the major waste from cork processing industries, is generated from grinding, cutting and finishing operations throughout the industrial cork process. Cork powder has been used mainly as fuel in cork industries. Cork waste ash is usually landfilled but if efficiently used in cement based construction materials it could contribute to sustainability. Strength and durability testing was undergone on mortar with 10 and 20% cement replacement with cork waste ash. Although strength is acceptable for 10% cement replacement with cork ash (5% loss at 90 days, compared to control), most durability properties (tested up to 6 months according to test type) reduced performance probably due to a broader pore structure caused by coarse particles in the ash which tested non pozzolanic. Moreover, cork waste ash does not present the necessary requirements in terms of chemical properties considering several standards. Present work has revealed that this cork waste cannot be used as a pozzolan or as a filler in cement based materials. In fact it is known that chemical composition of biomass ash is highly variable due to moisture variations, ash yield and different genetic types of inorganic matter in biomass and therefore it is important to pinpoint which types of biomass waste are adequate or not to use as cement replacement in construction.

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Section: Chemical and Physical Properties Of Cpamentioning

confidence: 82%

Strength and Durability of Mortar Using Cork Waste Ash as Cement Replacement

2014

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“…According to [20] tests on cement mortar with and without 15% replacement of cement with wood waste fly-ash have shown little effect on water absorption. In another study [27] the increase of wood waste fly-ash from 5% to 30% of binder mass in cement concrete resulted in a less than 1% increase in water absorption.…”

Section: Results Of Density and Water Absorption Testsmentioning

confidence: 99%

“…The wood waste fly-ash influences the setting time. It delays the initial and final setting time of the concrete mix [20,21]. The mechanical properties of cement composites can be enhanced with wood waste fly-ash with the replacement level up to 10% [19].…”

Section: Introductionmentioning

confidence: 99%

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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“…Several studies have analyzed the suitability of wood ash as a partial cement replacement material in the production of structural grade concrete and self compacting concrete for applications in building construction (8,9,10,11). Wood fly ash consists of particles which are highly irregular in shape with a highly porous surface (12 (13).…”

Section: Introductionmentioning

confidence: 99%