A preliminary investigation into the physical and chemical properties of biomass ashes used as aggregate fillers for bituminous mixtures

Melotti, Roberto; Santagata, Ezio; Bassani, Marco; Salvo, Milena; Rizzo, Stefano

doi:10.1016/j.wasman.2013.05.015

Cited by 101 publications

(58 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bottom ash are thicker and heavier, fly ash are produced in industrial combustion and gasification at temperatures between 800 and 1600 °C (Vassilev et al, 2013). Fly ash remains suspended in combustion gases and corresponds to the finer fraction, which reaches 40% of total ash produced and are usually removed through electrostatic precipitators and filters (Melotti et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products

Fernández¹,

Stolpe²,

Celis³

et al. 2017

Chil. j. agric. res.

View full text Add to dashboard Cite

In thermoelectric industry, synthetic gypsum and coal ash are generated as industrial by-products. The objective of this work was to evaluate the effect of different mixtures of synthetic gypsum and coal ash on N mineralization in an Alfisol. Nitrogen mineralization was evaluated by soil incubations under controlled conditions and potential mineralization using the nonlinear first order kinetics model Nm t = N 0 [1 -℮ (-kt) ], where Nm t is the mineral N accumulated at a specific time, N 0 is the potentially mineralizable N, k is the mineralization rate, and finally t is the incubation time. Treatments consisted of different mixtures of synthetic gypsum, coal ash and urea (M 1 : 50% synthetic gypsum, 50% coal ash, M 2 : 50% synthetic gypsum, 35% coal ash, 15% urea, M 3 : 45% synthetic gypsum; 40% coal ash, 15% urea, M 4 : 65% synthetic gypsum, 20% coal ash, 15% urea, M 5 : 55% synthetic gypsum, 30% coal ash, 15% urea). Each mixture was applied to the soil at 2 t ha ). Where the highest and lowest k were determined in M 5 (k = 0.44990) and M 3 (k = 0.04470), respectively. Mixtures of synthetic gypsum, coal ash and urea increased N mineralization over mixtures without urea. Respect N potential mineralization, in some cases N 0 and k values would respond more to the fit of the mathematical model employed than to the biological process.

show abstract

Section: Introductionmentioning

confidence: 99%

Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products

Fernández¹,

Stolpe²,

Celis³

et al. 2017

Chil. j. agric. res.

View full text Add to dashboard Cite

show abstract

“…The geometrical, physical and chemical characteristics of the ashes have already been reported in previous studies. 10,22 Ashes derived from woodchip combustion have a similar composition with relatively high CaO, SiO 2 and K 2 O content. SW ash, from a straw combustion plant, contains high quantities of K 2 O, SiO 2 , Cl 2 and SO 3 .…”

Section: Experimental Biomass Ash and Pretreatmentsmentioning

confidence: 99%

“…10 Besides, in Italy, a simplified procedure (regulation DM 05/02/98) is sufficient for recycling waste from biomass combustion in concrete, cement, brick production, embankment construction and environmental reuse.…”

mentioning

confidence: 99%

Biomass ash as supplementary cementitious material (SCM)

Salvo

Rizzo

Caldirola

et al. 2015

Advances in Applied Ceramics

View full text Add to dashboard Cite

This paper describes the research done in order to valorise the biomass ash and evaluate its use as supplementary cementitious material (SCM) in the cement industry. The biomass ash samples used in this study were collected from three different power plants. The characterisation of the ashes as SCMs was performed after two different valorisation processes: (i) a vitrification process in order to obtain a new material with high hydraulicity and (ii) an easy de-alkalisation process in order to reduce the alkali content. The results of this work show that biomass ash derived from the combustion of woodchips and straw, properly treated, is characterised by pozzolanic activity and latent hydraulicity that could be exploited for the manufacture of low embodied energy concrete. The ultimate strength of mortars prepared using vitrified biomass ash becomes higher than that of the parent Portland cement after 28 days.

show abstract

“…Fillers also may modify the ageing processes [4,5] and their finest grains may prevent moisture damage [1]. Numerous studies have proven that the properties of mineral filler aggregate had a significant effect on the properties of the asphalt mixtures [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…These characteristics are necessary for quality control, but are not sufficient to obtain information correlated with the expected performance of bituminous mixtures [7].…”

Section: Introductionmentioning

confidence: 99%