Contaminated biomass fly ashes – Characterization and treatment optimization for reuse as building materials

Grée, G.C.H. Doudart de la; Florea, M.V.A.; Keulen, A Arno; Brouwers, Hjh Jos

doi:10.1016/j.wasman.2015.12.023

Cited by 53 publications

(37 citation statements)

References 22 publications

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“…This suggests great potential of the biomass ash which may improve the packing density of blends. This observation differs from literature 5,7,9,19,24,25 where the focus was mainly on the fine particle range (below 90 µm) of wood fly ash. Moreover, only a few papers deal with the reuse of woody fly ash as a sand replacement 9 .…”

Section: Biomass Ash Characterizationcontrasting

confidence: 89%

“…Mineralogical analysis also indicates amorphous material present in the wood ash. However, the mineralogical composition differs from the results previously found in literature 2,[5][6][7]16 , where free CaO, free MgO, larnite, and 4CaO 4 · Al 2 Fe 2 O 6 were absent or present in significantly lower amounts. Small amounts (~ few %) of CaO (as well as few % of MgO) may be acceptable in PC.…”

Section: F I G 2 -Sem-se Micrographs Showing the Size And Morphologcontrasting

confidence: 87%

“…These levels were higher than reported in literature 2,[5][6][7]16 . Alkali oxides (Na 2 O + K 2 O) may be considered acceptable in amounts up to 2 % in cement, and up to 5 % in fly ash (EN 450-1).…”

Section: F I G 2 -Sem-se Micrographs Showing the Size And Morphologcontrasting

confidence: 74%

“…Presently, most of the biomass ash in Europe is landfilled 2,[4][5][6] , causing financial and material losses, as well as an environmental burden. A possible application for biomass ash could be the replacement of cement and/or sand in cementitious materials [2][3][4][5][6][7][8][9][10] . The utilization of biomass ash in the construction industry is an environmentally motivated choice.…”

Section: Introductionmentioning

confidence: 99%

“…Work on ash obtained from the combustion of forest waste wood and agricultural waste escalated 5,7,9,19,25 . Grée et al 5 indicated that a more contaminated biomass fly ash is obtained by combustion of treated wood waste rather than when forestry or agricultural waste is used as fuel. They investigated various treatment methods, at lab and pilot scale, for lowering the level of contaminants.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Reuse of Woody Biomass Ash Waste in Cementitious Materials

Ukrainczyk

Vrbos

Koenders

2016

Chem.Biochem.Eng.Q.

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There is an increased interest in the reuse of ash waste from biomass combustion, being a sustainable source of energy. This paper investigates the partial replacement of cement and sand in building materials with fly ash waste generated from combustion of woody biomass waste. The results show that the ash widens the particle size distribution of cement and has minerals complementary to portland cement, thus justifying its application as cement replacement, but with a relatively high amount of free CaO and MgO that may exert significant expansion. With ash addition, the rate of hydration, strength, and workability decreased. The optimum dosage showed 15 % of ash, replacing 5 % of cement and 3.33 % of sand, which can still produce a structural grade cementitious material with acceptable workability and mechanical properties. The ash exhibits hydraulic and pozzolanic activity that initially increases and subsequently decreases the amount of Ca(OH) 2 in the hydrated material.

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