Influence of solid solutions on chloride leaching from wasteforms

T. D. Dyer; J. E. Halliday; R. K. Dhir

doi:10.1680/warm.2006.159.3.131

Influence of solid solutions on chloride leaching from wasteforms

Research output: Contribution to journal › Article › peer-review

Abstract

NOTE: THE SYMBOLS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT AT THE PUBLISHER'S WEBSITE FOR AN ACCURATE DISPLAY. The hydration product Friedel's salt (Ca4Al2O6Cl2.10H2O) is frequently encountered in wasteforms solidified and stabilised using Portland cement. The ability of Friedel's salt to form solid solutions plays a role in chloride binding in such matrices. This paper addresses one practical example of this influence by examining the immobilisation of chloride ions from municipal solid waste incinerator fly ash in cementitious matrices also comprising Portland cement and fly ash from coal-fired power generation. Measurements of quantities and structural parameters of Friedel's salt in pastes containing incinerator fly ashes show that chloride ion release is lowest when large quantities of chloride-deficient Friedel's salt is generated. However, chloride is more tightly bound elsewhere in the material, probably in calcium silicate hydrate (CSH) gel. The dissolution of Friedel's salt is modelled using a geochemical modelling program capable of dealing with solid solutions. These observations reinforce the need to incorporate variable phase composition in models for predicting leaching from cementitious matrices containing waste materials.

Original language	English
Pages (from-to)	131-139
Number of pages	9
Journal	Proceedings of the ICE : Waste and Resource Management
Volume	159
Issue number	3
DOIs	https://doi.org/10.1680/warm.2006.159.3.131
Publication status	Published - 2006

Keywords

Mathematical modelling
Landfill
Waste management and disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1680/warm.2006.159.3.131

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title = "Influence of solid solutions on chloride leaching from wasteforms",

abstract = "NOTE: THE SYMBOLS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT AT THE PUBLISHER'S WEBSITE FOR AN ACCURATE DISPLAY. The hydration product Friedel's salt (Ca4Al2O6Cl2.10H2O) is frequently encountered in wasteforms solidified and stabilised using Portland cement. The ability of Friedel's salt to form solid solutions plays a role in chloride binding in such matrices. This paper addresses one practical example of this influence by examining the immobilisation of chloride ions from municipal solid waste incinerator fly ash in cementitious matrices also comprising Portland cement and fly ash from coal-fired power generation. Measurements of quantities and structural parameters of Friedel's salt in pastes containing incinerator fly ashes show that chloride ion release is lowest when large quantities of chloride-deficient Friedel's salt is generated. However, chloride is more tightly bound elsewhere in the material, probably in calcium silicate hydrate (CSH) gel. The dissolution of Friedel's salt is modelled using a geochemical modelling program capable of dealing with solid solutions. These observations reinforce the need to incorporate variable phase composition in models for predicting leaching from cementitious matrices containing waste materials.",

keywords = "Mathematical modelling, Landfill, Waste management and disposal",

author = "Dyer, {T. D.} and Halliday, {J. E.} and Dhir, {R. K.}",

note = "dc.publisher: Institution of Civil Engineers ",

year = "2006",

doi = "10.1680/warm.2006.159.3.131",

language = "English",

volume = "159",

pages = "131--139",

journal = "Proceedings of the ICE : Waste and Resource Management",

issn = "1747-6526",

publisher = "Thomas Telford",

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T1 - Influence of solid solutions on chloride leaching from wasteforms

AU - Dyer, T. D.

AU - Halliday, J. E.

AU - Dhir, R. K.

N1 - dc.publisher: Institution of Civil Engineers

PY - 2006

Y1 - 2006

N2 - NOTE: THE SYMBOLS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT AT THE PUBLISHER'S WEBSITE FOR AN ACCURATE DISPLAY. The hydration product Friedel's salt (Ca4Al2O6Cl2.10H2O) is frequently encountered in wasteforms solidified and stabilised using Portland cement. The ability of Friedel's salt to form solid solutions plays a role in chloride binding in such matrices. This paper addresses one practical example of this influence by examining the immobilisation of chloride ions from municipal solid waste incinerator fly ash in cementitious matrices also comprising Portland cement and fly ash from coal-fired power generation. Measurements of quantities and structural parameters of Friedel's salt in pastes containing incinerator fly ashes show that chloride ion release is lowest when large quantities of chloride-deficient Friedel's salt is generated. However, chloride is more tightly bound elsewhere in the material, probably in calcium silicate hydrate (CSH) gel. The dissolution of Friedel's salt is modelled using a geochemical modelling program capable of dealing with solid solutions. These observations reinforce the need to incorporate variable phase composition in models for predicting leaching from cementitious matrices containing waste materials.

AB - NOTE: THE SYMBOLS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE ABSTRACT AT THE PUBLISHER'S WEBSITE FOR AN ACCURATE DISPLAY. The hydration product Friedel's salt (Ca4Al2O6Cl2.10H2O) is frequently encountered in wasteforms solidified and stabilised using Portland cement. The ability of Friedel's salt to form solid solutions plays a role in chloride binding in such matrices. This paper addresses one practical example of this influence by examining the immobilisation of chloride ions from municipal solid waste incinerator fly ash in cementitious matrices also comprising Portland cement and fly ash from coal-fired power generation. Measurements of quantities and structural parameters of Friedel's salt in pastes containing incinerator fly ashes show that chloride ion release is lowest when large quantities of chloride-deficient Friedel's salt is generated. However, chloride is more tightly bound elsewhere in the material, probably in calcium silicate hydrate (CSH) gel. The dissolution of Friedel's salt is modelled using a geochemical modelling program capable of dealing with solid solutions. These observations reinforce the need to incorporate variable phase composition in models for predicting leaching from cementitious matrices containing waste materials.

KW - Mathematical modelling

KW - Landfill

KW - Waste management and disposal

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DO - 10.1680/warm.2006.159.3.131

M3 - Article

SN - 1747-6526

VL - 159

SP - 131

EP - 139

JO - Proceedings of the ICE : Waste and Resource Management

JF - Proceedings of the ICE : Waste and Resource Management

IS - 3

ER -

Influence of solid solutions on chloride leaching from wasteforms

Abstract

Keywords

UN SDGs

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