https://repositorium.sdum.uminho.pt/bitstream/1822/16351/1/Pacheco%20Torgal%20et%20al.%202012.pdf

Durability of alkali-activated binders: A clear advantage over Portland cement or an unproven issue?

Factors affecting hazardous waste solidification/stabilization: a review.

This paper presents an investigation of the compressive strength and the durability of lignite bottom ash geopolymer mortars in 3% sulfuric acid and 5% sodium sulfate solutions. Three finenesses of ground bottom ash viz., fine, medium and coarse bottom ash were used to make geopolymer mortars. Sodium silicate, sodium hydroxide and curing temperature of 75 °C for 48 h were used to activate the geopolymerization. The results were compared to those of Portland cement and high volume fly ash mortars. It was found that the fine bottom ash was more reactive and gave geopolymer mortars with higher compressive strengths than those of the coarser fly ashes. All bottom ash geopolymer mortars were less susceptible to the attack by sodium sulfate and sulfuric acid solutions than the traditional Portland cement mortars.

Resistance of lignite bottom ash geopolymer mortar to sulfate and sulfuric acid attack

The treatment of hazardous wastes using cement-based solidification–stabilization (S–S) is of increasing importance as an option for remediating contaminated sites. Indeed, among the various treatm...

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Solidification/Stabilization of Organic and Inorganic Contaminants using Portland Cement: A Literature Review

Fly ash for soil amelioration: A review on the influence of ash blending with inorganic and organic amendments

Preparation of geopolymer from fluidized bed combustion bottom ash

Stabilization/solidification of galvanic sludges by asphalt emulsions.

An effective procedure for stabilization/solidification of industrial wastewater treatment sludge has been developed and verified. The procedure consists of economically advantageous sludge solidification by fluidized bed combustion ash with an addition of highly porous carbon black as an adsorption additive, and subsequent creation of an asphalt coating on the surface of the solidified sludge by means of aqueous asphalt emulsion. The carbon black addition enables the reduction of binder dosage needed for solidification of the sludge and simultaneously reduces the leachability of organic compounds. The creation of an asphalt coating effectively prevents leaching of all pollutants observed. The method also reduces the infectiousness of the stabilized/solidified sludge.

Stabilization/Solidification of Wastewater Treatment Sludge

The technology of fluidized-bed combustion (FBC) of coal generates byproducts that have a series of unique characteristics and potential uses in technological practice. In this study, the products of fluidized-bed combustion (FBC-P) of coal derived from Moravian heat stations, a.s. Zlin, Cinergy Global Resources, Czech Republic, were characterized. Particular attention was paid to determining the chemical composition of FBC-P, the content of polycyclic aromatic hydrocarbons (PAHs) and toxic metals in the water leachates of these FBC-P, the content of unburned carbon, the capability of FBC-P to solidify with water and form a solid matrix, and the method for discovering optimum mixing water content for FBC-P solidification. The results suggest that one of the qualitatively more important means of utilizing FBC-P could be their application during solidification/stabilization (S/S) of wastes, particularly wastewater treatment sludges.

Milan Vondruska

Papers

Preparation of geopolymer from fluidized bed combustion bottom ash

Stabilization/solidification of galvanic sludges by asphalt emulsions.

Stabilization/Solidification of Wastewater Treatment Sludge

Characterization of products from fluidized-bed combustion of coal.

Stabilization/solidification of munition destruction waste by asphalt emulsion.