Effect of biomass fly ashes as road stabilisation binder

Sarkkinen, Minna; Kujala, Katharina; Kemppainen, Kimmo; Gehör, Seppo

doi:10.1080/14680629.2016.1235508

Cited by 18 publications

(18 citation statements)

References 25 publications

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“…Stabilizing properties of ash depend on the chemical content and reactivity of certain compounds and, obviously, on the type of base material that is to be stabilised. Considering the energy savings and environmental concerns, and taking into account stabilizing properties of ash, the application of an appropriate type of bioash would reduce the costs of soil stabilization in cases when the binder accounts for 50-70 % of the cost [29].…”

Section: Stabilization Of Soil and Base Layers Of Pavement Structuresmentioning

confidence: 99%

“…According to Sarkkinen et al [29] and Bohrn et al [30], when bioash is applied as binder for the stabilization of various materials, it must contain at least 20 % of CaO to demonstrate good binding properties. If the CaO content is lower than that, it is necessary to use activators (cement or lime).…”

Section: Stabilization Of Soil and Base Layers Of Pavement Structuresmentioning

confidence: 99%

“…In addition to the content of the above mentioned oxides, good pozzolanic properties of bioash also depend on whether their structure is amorphous or crystalline [29], which is related to combustion technology and the size of particles.…”

Section: Stabilization Of Soil and Base Layers Of Pavement Structuresmentioning

confidence: 99%

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Possibilities for using bioash in road construction

2018

JCE

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Bioashes are inevitable product of meeting the demands to satisfy the increased use of renewable resources in energy production. Ecological and economic problems of bioash disposal, due to its appropriate chemical and physical properties, can be reduced by its application in the construction industry as raw materials. The paper therefore provides an research overview on various aspects of the bioash application in road construction, in compliance with a range of properties depending on the type of biomass and the conditions of combustion. Also shown is current state of research of bioash generated in the domestic thermal power plants.

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Section: Stabilization Of Soil and Base Layers Of Pavement Structuresmentioning

confidence: 99%

Section: Stabilization Of Soil and Base Layers Of Pavement Structuresmentioning

confidence: 99%

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Possibilities for using bioash in road construction

2018

JCE

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“…The chemical composition of BA, especially the content of CaO and pozzolan, indicates the possibility of partial or complete replacement of traditional binders, cement, and lime during the stabilization of the subgrade materials with a lower load bearing capacity [ 10 , 11 , 12 , 13 , 14 , 15 ], in the base layers of pavement structures [ 16 , 17 , 18 , 19 , 20 ] or in concretes [ 21 , 22 ]. With the absence of binding properties, BA can be used as a replacement for a mineral filler or aggregate in asphalt mixtures, a filler in concretes, and as a replacement for smaller aggregate in base layers of pavement structures, depending on the fraction of ash.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Evaluation of the Properties of Asphalt Mixture with Wood Ash Filler

et al. 2021

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Today, the road construction profession is more than ever facing limited and increasingly expensive resources for component materials of asphalt mixtures, which has also led to the need for continuous research on the use of waste materials. One such potentially usable waste material is ash obtained by the combustion of wood biomass that is used to produce heat and electricity. The goal of this paper is to ascertain the possibility of using wood ash (WA) as the filler in asphalt concrete mixtures for the base-wearing layers of a pavement. The properties of Marshall stability (MS), quotient (MQ) and deformations, and the indirect tensile strength of water-conditioned samples and dry samples were tested on asphalt samples of an AC16 surf mixture with different contents of wood ash as the filler. The obtained values of MS and MQ indicate that a 50% content of bio ash in the filler results in an increase in asphalt’s resistance to the appearance of plastic deformations and greater tensile strength and in good asphalt resistance to the action of water.

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“…In the EU, the use of WBA in agriculture is regulated by the criteria determined by national legislation (such as in Sweden, Finland, Germany, Austria, and Croatia) that specify limits for heavy metals based on the total content of elements in the ash [21][22][23]. Furthermore, WBA recovery presents an array of options for the construction industry: as a raw material for alkali activation [24][25][26], in the production of ceramic products [27,28], as a raw material for road construction [29][30][31] or as an aggregate/binder in concrete production [32][33][34][35][36][37][38][39]. Cement is the main component of concrete, one of the dominant materials used in the construction industry [40,41].…”

Section: Introductionmentioning

confidence: 99%

Leaching Characteristics of Wood Biomass Fly Ash Cement Composites

Carević

Štirmer

Trkmić³

et al. 2020

Applied Sciences

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Wood biomass ash (WBA) represents an environmental and economic problem for energy producers, and there have been extensive studies of using WBA as a raw material in construction products. This study investigates the leaching characteristics of WBA cement composites based on testing results. Currently, 70% of WBA is landfilled, and the rest is primarily used in agriculture; therefore, this study also addresses the leaching as a component of environmental safety of these two primary WBA management approaches. An analysis of the leaching characteristics of WBA, monolithic, and crushed cement composites is performed by replacing 15% of the cement with WBA. The study was conducted using three WBA samples collected from different power plants. Increased values of leaching from the WBA itself are indicative of potential issues that could occur in the case of its disposal. The study concluded that the WBA could be potentially environmentally acceptable as a raw material in the concrete industry because the heavy metals are stabilized within the cement matrix.

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Effect of biomass fly ashes as road stabilisation binder

Cited by 18 publications

References 25 publications

Possibilities for using bioash in road construction

Possibilities for using bioash in road construction

Laboratory Evaluation of the Properties of Asphalt Mixture with Wood Ash Filler

Leaching Characteristics of Wood Biomass Fly Ash Cement Composites

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