scholarly journals Interface Bonding Behavior of Concrete-Filled Steel Tube Blended with Circulating Fluidized Bed Bottom Ash

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1529
Author(s):  
Lan Liu ◽  
Lei He ◽  
Zhi Cheng ◽  
Xiaoyi Wang ◽  
Zhe Ma ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Bottom Ash ◽  
Steel Tube ◽  
Interface Bonding ◽  
Concrete Filled Steel Tube ◽  
Binder Ratio ◽  
Bonding Length ◽  
Interface Bonding Strength ◽  
Better Than

The interface bonding behavior between the steel tube and the concrete of concrete-filled steel tube (CFST) blended with circulating fluidized bed bottom ash (CFB-BA) was investigated in this study. A total of 8 groups of CFSTs stub columns were prepared with different dosage of CFB-BA, water-binder ratio (W/B), and interface bonding length. A series of push-out tests were carried out to acquire the data representing the interface bonding behavior. The results show that the dosage of CFB-BA has a direct effect on interface bonding behavior of CFST. CFB-BA can improve the interface bonding behavior of CFST. The highest ultimate bonding load and strength are achieved when the dosage of CFB-BA is 30%. When the dosage of CFB-BA increases to 50%, its interface bonding behavior decreases, but is still better than that of CFST without CFB-BA. W/B has a negative correlation with the interface bonding behavior of CFST. While the W/B increases, the interface bonding load and strength of CFST decreases. The increase of the interface bonding length can improve the interface bonding load, but cannot improve the interface bonding strength.

Sulfate decomposition from circulating fluidized bed combustors bottom ash

2007 ◽  
Vol 62 (23) ◽  
pp. 6827-6835 ◽  
Author(s):  
A. Hoteit ◽  
E. Bouquet ◽  
C. Schönnenbeck ◽  
P. Gilot
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Bottom Ash

scholarly journals PROKNOW-C: DA SELEÇÃO DE UM PORTFÓLIO DE ARTIGOS A ANÁLISE SISTÊMICA SOBRE BLOCOS DE TERRA COMPRIMIDA

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Sâmara França ◽  
Mariana Rezende Schuab ◽  
Kastelli Pacheco Sperandio ◽  
Rogério Cabral de Azevedo ◽  
Maria Cristina Ramos de Carvalho ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Bottom Ash ◽  
Fluidized Bed Combustion ◽  
Circulating Fluidized Bed Combustion

Blocos de terra compactada são elementos de alvenaria feitos a partir de terra estabilizada e adensada. Estes materiais se destacam no quesito sustentabilidade por dispensarem a fase de queima em sua produção. A estabilização química dos blocos pode ser realizada através da ativação alcalina que consiste na obtenção de ligantes a partir de materiais aluminossilicatos em uma solução fortemente alcalina. A ativação alcalina também é vista como ambientalmente correta devido a sua baixa emissão de gases do efeito estufa.  Entre os materiais precursores da ativação alcalina estão as cinzas volantes devido a sua composição química. Diante desse contexto, o objetivo deste trabalho é montar um portfólio de artigos científicos sobre blocos de terra compactado com adição de cinzas orgânicas e ativação alcalina, fazer análise bibliométrica e sistêmica dos artigos. O portfólio bibliográfico resultante é composto por 4 artigos relevantes e alinhados com o tema. Dentro da análise bibliométrica pode-se destacar o artigo “Feasibility o fmanufacturing geopolymer bricks using circulating fluidized bed combustion bottom ash” como mais relevante. Em relação a análise sistêmica elencou-se 5 lentes para a discussão dos artigos e a partir disso pode-se observar oportunidades para futuras pesquisas.

scholarly journals Durability evaluation of circulating fluidized bed fly ash-based geopolymer

2021 ◽  
Vol 271 ◽  
pp. 04014
Author(s):  
Li Dongsheng ◽  
Zhou Xinxing
Keyword(s):  
Fluidized Bed ◽  
Carbon Dioxide Emissions ◽  
Circulating Fluidized Bed ◽  
Acid Resistance ◽  
Alkali Resistance ◽  
Fatigue Lifetime ◽  
Fundamental Properties ◽  
High Temperature Heat Treatment ◽  
Temperature Heat Treatment ◽  
Better Than

To make full use of the circulating fluidized bed fly (CFB-FA), rich-water carbide slag was used as alkali-activator to promote the hydration of CFB-FA and prepare circulating fluidized bed fly-based geopolymer (CFB-FAG). The fundamental properties, mechanical properties, and acid alkali-resistance of CFB-FAG were investigated. The optimum content of CFB-FA is 25%. it indicates that CFB-FA can prepare the excellent properties of geopolymer without high-temperature heat treatment. The alkali resistance of CFB-FAG is better than that of acid resistance. Furthermore, the fatigue lifetime of CFB-FAG decreases by 20% after acid treatment. The achievement can help us make full use of the solid waste and achieve the goal of peak carbon dioxide emissions and carbon neutral.

Prediction of Sorbent Performance in a Circulating Fluidized Bed Boiler Based on Petrographic Properties

2006 ◽  
Vol 129 (2) ◽  
pp. 565-571 ◽  
Author(s):  
Peter L. Rozelle ◽  
Sarma V. Pisupati ◽  
Alan W. Scaroni
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Bottom Ash ◽  
Circulating Fluidized Bed Boiler ◽  
Operating Data ◽  
Full Load ◽  
Full Load Operation

A method for prediction of sorbent consumption is presented here and has been developed based on plant operating data for a boiler in which several limestone and dolostone products were tested under similar firing conditions. The method considers the characteristic partitioning of calcium and sulfur between the flyash and bottom ash stream for the boiler, the feed particle size distribution of the sorbent, and petrographic properties of the sorbents. The predictions of sorbent usage were compared to plant operating data for five sorbents, of two distinct petrographic types. The plant operating data used featured full load operation. The five sorbents tested were all from Pennsylvania, and each contained greater than 40wt.% CaO. In four of the five cases, the predicted sorbent usage was within 10wt.% of the average full load sorbent usage by the boiler.

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