Ash recovery from stock - issues to consider based on experience in France.pdf

Loic Danest, Societe Surschiste

Description

Ash recovery from legacy stock – issues to consider based on experience in France Authors Mr. Loic Danest - France - Societe Surschiste Abstract In the 90s, Surschiste commissioned two drying facilities. The initial objective of these facilities was to reuse conditioned ashes for summer delivery when the power plant was stopped, creating a sustainable market. Over the years, as production decreased, the dryers were used for ashes from historic stockpiles. The main purpose of this presentation is to report on the methodology used to achieve consistency in the performance of dried ashes used as supplementary cementitious material. The first certificate of consistency of performance for dried fly ash in concrete, covered by EN 450, was granted in 2006 and is still in effect today. When processing ash from conditioned to harvested sources, new parameters must be taken into account to obtain a pozzolanic additive with adequate reactivity without compromising properties for fresh concrete. Reactivity and carbon content require specific attention, and conclusions from several studies will be reported.

 
May 15th, 9:00 AM May 15th, 9:30 AM

Ash recovery from stock - issues to consider based on experience in France.pdf

Grand Rapids, Michigan

Ash recovery from legacy stock – issues to consider based on experience in France Authors Mr. Loic Danest - France - Societe Surschiste Abstract In the 90s, Surschiste commissioned two drying facilities. The initial objective of these facilities was to reuse conditioned ashes for summer delivery when the power plant was stopped, creating a sustainable market. Over the years, as production decreased, the dryers were used for ashes from historic stockpiles. The main purpose of this presentation is to report on the methodology used to achieve consistency in the performance of dried ashes used as supplementary cementitious material. The first certificate of consistency of performance for dried fly ash in concrete, covered by EN 450, was granted in 2006 and is still in effect today. When processing ash from conditioned to harvested sources, new parameters must be taken into account to obtain a pozzolanic additive with adequate reactivity without compromising properties for fresh concrete. Reactivity and carbon content require specific attention, and conclusions from several studies will be reported.