Environmental and technical assessments of the potential utilization of sewage sludge ashes (SSAs) as secondary raw materials in construction

Chen, Maozhe; Blanc, D.; Gautier, Mathieu; Méhu, Jacques; Gourdon, Rémy

doi:10.1016/j.wasman.2013.01.004

Cited by 111 publications

(63 citation statements)

References 13 publications

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“…However, further industrial wastes such as steel slag [54] and sewage sludge ashes [55] do not suffer from such restricted supply. Consumer wastes such as plastic, glass and ceramics can also be used as secondary aggregates in concrete production [56].…”

Section: Substitution In the Production Of Common Materialsmentioning

confidence: 99%

The greenhouse gas emissions and mitigation options for materials used in UK construction

Giesekam

Barrett

Taylor

et al. 2014

Energy and Buildings

136

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The UK construction industry faces the daunting task of replacing and extending a significant proportion of UK infrastructure, meeting a growing housing shortage and retrofitting millions of homes whilst achieving greenhouse gas (GHG) emission reductions compatible with the UK's legally binding target of an 80% reduction by 2050. This paper presents a detailed time series of embodied GHG emissions from the construction sector for 1997-2011. This data is used to demonstrate that strategies which focus solely on improving operational performance of buildings and the production efficiencies of domestic material producers will be insufficient to meet sector emission reduction targets.Reductions in the order of 80% will require a substantial decline in the use of materials with carbon-intensive supply chains. A variety of alternative materials, technologies and practices are available and the common barriers to their use are presented based upon an extensive literature survey. Key gaps in qualitative research, data and modelling approaches are also identified. Subsequent discussion highlights the lack of client and regulatory drivers for uptake of alternatives and the ineffective allocation of responsibility for emissions reduction within the industry. Only by addressing and overcoming all these challenges in combination can the construction sector achieve drastic emissions reduction.

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Section: Substitution In the Production Of Common Materialsmentioning

confidence: 99%

The greenhouse gas emissions and mitigation options for materials used in UK construction

Giesekam

Barrett

Taylor

et al. 2014

Energy and Buildings

136

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show abstract

“…According to Chen et al [23] mortar strength (compressive and flexural) drops linearly with increasing of the portion of ISSA substituting cement. This effect is explained by two hypotheses: too much water required in mixtures with ash in order to maintain workability and CaO content in ISSA (less than 10 %) that affect the hydraulic properties.…”

Section: Issa Characteristicsmentioning

confidence: 97%

“…Investigations done so far used the leaching tests to determine the concentration of heavy metals in incinerated sewage sludge ash. The results show that in leaching of heavy metals from ISSA most frequently molybdenum (Mo) and selenium (Se) appear in concentrations higher than allowed, while the leaching test of cement mortars showed that no chemical element appeared within limits higher than permitted for classifying of mortar into the "non-hazardous waste" category [2,23].…”

Section: Issa Characteristicsmentioning

confidence: 98%

“…This effect is explained by two hypotheses: too much water required in mixtures with ash in order to maintain workability and CaO content in ISSA (less than 10 %) that affect the hydraulic properties. For the type of ISSA used in their research, Chen et al [23] concluded that the optimum portions of cement substitution in production of mortar with ISSA are 10 %.…”

Section: Issa Characteristicsmentioning

confidence: 99%

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Use of incinerated sewage sludge ash in cement mortars: case study in Croatia

2017

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Original scientific paper In the paper an experimental research has been carried out regarding the possibility for the use of incinerated sewage sludge ash (ISSA) in the production of cement mortars with partial cement replacement. Different mixtures of cement mortar have been investigated, with comparison of its basic characteristics with and without certain amounts of added ISSA that was incinerated at the temperature of 800 °C. Additionally, the influence of the additives (metakaolin and silicon dust) was also investigated with the purpose to improve the physical characteristics of mortars. Altogether 177 specimens of cement mortar were investigated, with 9 different mixtures. In this research the sewage sludge from the Zagreb wastewater treatment plant was used. Results have shown satisfying physical and mechanical characteristics of mortars with added ISSA (workability, setting time, flexural and compressive strength) which brings to conclusion that use of ISSA in production of cement mortars seems possible and justified.Keywords: cement mortar; incineration; ISSA; sewage sludge; wastewater Uporaba pepela dobivenog spaljivanjem mulja u proizvodnji cementnog morta: pilot projekt u Hrvatskoj Izvorni znanstveni članak U ovom radu je provedeno istraživanje mogućnosti i opravdanosti uporabe mulja s uređaja za pročišćavanje otpadnih voda na način da se pepeo dobiven spaljivanjem mulja ugrađuje u cementni mort kao sirovina (zamjena dijela cementa). U radu su provedena ispitivanja na cementnom mortu, pri čemu su razmatrane usporedbe osnovnih svojstava mješavina morta bez dodatka pepela i s dodatkom određenih udjela pepela dobivenog spaljivanjem mulja na temperaturi 800 °C. Dodatno je ispitivan i utjecaj dodatka aditiva (metakaolina i silicijske prašine), s ciljem poboljšanja fizikalnih karakteristika morta. Ukupno je proizvedeno i ispitano 177 uzoraka cementnog morta s 9 različitih mješavina. Za potrebe ovog istraživanja rabljen je mulj dobiven na uređaju za pročišćavanje otpadnih voda u Zagrebu. Dobiveni rezultati s dodatkom pepela pokazali su zadovoljavajuća svojstva što navodi na zaključak da je u pogledu ispitivanih svojstava (obradljivost, vrijeme vezivanja, čvrstoća na savijanje i tlačna čvrstoća) moguća i opravdana uporaba mulja u proizvodnji cementnog morta.

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“…Una de las ventajas de este sistema es que las cenizas o residuos secundarios obtenidos por los combustibles alternativos se incorporan en el clínker, mientras que en una incineradora las cenizas se deben gestionar por otro lado. Las proporciones de cenizas más adecuadas resultaron ser de un 10% de sustitución de cemento y de un 2% de sustitución de arena (Chen et al, 2013).…”

Section: Gestión De Lodos En Cementeraunclassified

Potencial de producción de biochar en España a partir de residuos de la industria papelera, de lodos de E.D.A.R., de residuos sólidos urbanos y de residuos ganaderos: Estudio de la fijación de carbono

García¹,

Manso²

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Environmental and technical assessments of the potential utilization of sewage sludge ashes (SSAs) as secondary raw materials in construction

Cited by 111 publications

References 13 publications

The greenhouse gas emissions and mitigation options for materials used in UK construction

The greenhouse gas emissions and mitigation options for materials used in UK construction

Use of incinerated sewage sludge ash in cement mortars: case study in Croatia

Potencial de producción de biochar en España a partir de residuos de la industria papelera, de lodos de E.D.A.R., de residuos sólidos urbanos y de residuos ganaderos: Estudio de la fijación de carbono

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