Characterization of eco-cement paste produced from waste sludges

Yen, Chi-Liang; Tseng, Dyi‐Hwa; Lin, Tung-Tsan

doi:10.1016/j.chemosphere.2011.04.050

Cited by 97 publications

(41 citation statements)

References 23 publications

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“…There have also been attempts to incorporate WTRs into cements (Huang et al 2005;Chen et al 2010;Yen et al 2011) and concretes (Kaosol 2010;Sales et al 2011;Lee et al 2012;Owaid et al 2017) (Table 8). The production processes related to these materials do not include a sintering step; consequently, Rodríguez et al (2010) found that additions as small as 10% were enough to retard the hydration rates of mortars which in turn increased the duration of the production process by over 12 h. Multiple studies reported that increasing WTR additions reduced mechanical or compressive strength (Rodríguez et al 2010;Owaid et al 2017), although Chen et al (2010) noted that these changes only occurred above 7% additions while increases in strength were produced below 7% additions.…”

Section: Cement Concrete and Aggregatesmentioning

confidence: 99%

Potential Alternative Reuse Pathways for Water Treatment Residuals: Remaining Barriers and Questions—a Review

Turner

Wheeler²,

Stone³

et al. 2019

Water Air Soil Pollut

114

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Water treatment residuals (WTRs) are byproducts of the coagulation and flocculation phase of the drinking water treatment process that is employed in the vast majority of water treatment plants globally. Production of WTRs are liable to increase as clean drinking water becomes a standard resource. One of the largest disposal routes of these WTRs was via landfill, and the related disposal costs are a key driver behind the operational cost of the water treatment process. WTRs have many physical and chemical properties that lend them to potential positive reuse routes. Therefore, a large quantity of literature has been published on alternative reuse strategies. Existing or suggested alternative disposal routes for WTRs can be considered to fall within several categories: use as a pollutant and excess nutrient absorbent in soils and waters, bulk land application to agricultural soils, use in construction materials, and reuse through elemental recovery or as a wastewater coagulant. The main concerns and limitations restricting current and future beneficial uses of WTRs are discussed within. This includes those limitations linked to issues that have received much research attention such as perceived risks of undesirable phosphorous immobilisation and aluminium toxicity in soils, as well as areas that have received little coverage such as implications for terrestrial ecosystems following land application of WTRs.

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Section: Cement Concrete and Aggregatesmentioning

confidence: 99%

Potential Alternative Reuse Pathways for Water Treatment Residuals: Remaining Barriers and Questions—a Review

Turner

Wheeler²,

Stone³

et al. 2019

Water Air Soil Pollut

114

View full text Add to dashboard Cite

show abstract

“…Vieira et al [10] describe alkaline oxides fluxes effects, mainly Na 2 O, K 2 O, Fe 2 O 3 , CaO and MgO, which play an important role during firing, reducing the refractory material and promoting liquid phase formation. A number of studies has been developed in order to provide proper destination to such residues such as raw material for Portland cement clinker [21][22][23] and mineral admixture to cement based compounds [20,[24][25][26]. Therefore, this paper aims to study the use of basaltic filler waste as a raw material for red ceramic formulations.…”

Section: Introductionmentioning

confidence: 99%

Use of basaltic waste as red ceramic raw material

Mendes

Morales²,

Reis³

2016

Cerâmica

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Nowadays, environmental codes restrict the emission of particulate matters, which result in these residues being collected by plant filters. This basaltic waste came from construction aggregate plants located in the Metropolitan Region of Londrina (State of Paraná, Brazil). Initially, the basaltic waste was submitted to sieving (< 75 mm) and the powder obtained was characterized in terms of density and particle size distribution. The plasticity of ceramic mass containing 0%, 10%, 20%, 30%, 40% and 50% of basaltic waste was measured by Atterberg method. The chemical composition of ceramic formulations containing 0% and 20% of basaltic waste was determined by X-ray fluorescence. The prismatic samples were molded by extrusion and fired at 850 °C. The specimens were also tested to determine density, water absorption, drying and firing shrinkages, flexural strength, and Young's modulus. Microstructure evaluation was conducted by scanning electron microscopy, X-ray diffraction, and mercury intrusion porosimetry. Basaltic powder has similar physical and chemical characteristics when compared to other raw materials, and contributes to ceramic processing by reducing drying and firing shrinkage. Mechanical performance of mixtures containing basaltic powder is equivalent to mixtures without waste. Microstructural aspects such as pore size distribution were modified by basaltic powder; albite phase related to basaltic powder was identified by X-ray diffraction.

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“…We could mention wastes from building demolition activities [15,16], the steel and metalworking industry [17,18], paper industry [19], rock quarrying activity [20], recycled glass [21] and waste generated by communities (sanitation-water treatment [22,23], and municipal waste management [24,25]). …”

Section: Cement Industrymentioning

confidence: 99%

Ability of Two Dam Fine-Grained Sediments to be Used in Cement Industry as Raw Material for Clinker Production and as Pozzolanic Additional Constituent of Portland-Composite Cement

Faure

Smith

Coudray

et al. 2017

Waste Biomass Valor

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other one is calcined in the range 550-1000 °C aiming to obtain a pozzolanic reactive material that could be used as supplementary cementitious material in blended Portland cement. After thermal treatments, the products are characterized and compared to ordinary Portland cement (OPC) and to pozzolanic active materials (fly ash from pulverized-coal power plant). Results showed that each sediment is suitable for the only tested reuse option. For the clinker prepared with SEP sediment, the morphology and the mineralogical composition correspond to those of a typical Portland clinker. Concerning calcined STA pozzolanic activity, the optimum thermal treatment was found to be 900 °C using the chemical Frattini test. Similar compressive strength results were obtained with calcined STA and silico-aluminous fly ash.Abstract Fine-grained sediment deposition is a phenomenon that occurs at different extents in all the reservoirs. This particle accumulation has to be properly managed, in accordance with the operational needs and the environment. As an extracted and on-land managed sediment has to be considered as a waste material according to both European and French regulations, sustainable reuse options need to be investigated. One of them could be a beneficial reuse as a raw material in cement industry either as partial substitution in Portland clinker raw mix or as a supplementary cementitious material (SCM) after thermal treatment in order to activate its possible pozzolanic activity. Two dredged materials, labelled SEP and STA, both from French hydroelectric reservoirs, are characterized on physical, chemical and mineralogical aspects. SEP is used as raw material partial replacement for clinker synthesis and the The original version of this article was revised due to a retrospective Open Access order.

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Characterization of eco-cement paste produced from waste sludges

Cited by 97 publications

References 23 publications

Potential Alternative Reuse Pathways for Water Treatment Residuals: Remaining Barriers and Questions—a Review

Potential Alternative Reuse Pathways for Water Treatment Residuals: Remaining Barriers and Questions—a Review

Use of basaltic waste as red ceramic raw material

Ability of Two Dam Fine-Grained Sediments to be Used in Cement Industry as Raw Material for Clinker Production and as Pozzolanic Additional Constituent of Portland-Composite Cement

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