نتایج جستجو برای: carbonation test

تعداد نتایج: 813775  

2017
Ki-Bong Park Yong Han Ahn

The increase in CO2 concentrations and global warming will increase the carbonation depth of concrete. Furthermore, temperature rise will increase the rate of corrosion of steel rebar after carbonation. On the other hand, compared with normal concrete, high volume fly ash (HVFA) concrete is more vulnerable to carbonation-induced corrosion. Carbonation durability design with climate change is cr...

2012
Anjali Gupta Arvind K. Nema

The present study focuses on exploring an array of alkaline waste residues, procured from diverse sources as means for sequestering maximal CO2. Alkaline waste residues undertaken for the study included: (1) Cement Bag Filter Dust, (2) Finished Cement Sample, (3) Marble Dust and (4) Baghouse Dust. Experiments were conducted in a self fabricated Carbonation reactor under 80% CO2 concentration an...

Journal: :Journal of hazardous materials 2006
Eva Rendek Gaëlle Ducom Patrick Germain

During bottom ash weathering, carbonation under atmospheric conditions induces physico-chemical evolutions leading to the pacification of the material. Fresh bottom ash samples were subjected to an accelerated carbonation using pure CO2. The aim of this work was to quantify the volume of CO2 that could be sequestrated with a view to reduce greenhouse gas emissions and investigate the possibilit...

Journal: :Environmental science & technology 2004
Michael J McKelvy Andrew V G Chizmeshya Jason Diefenbacher Hamdallah Béarat George Wolf

As compared with other candidate carbon sequestration technologies, mineral carbonation offers the unique advantage of permanent disposal via geologically stable and environmentally benign carbonates. The primary challenge is the development of an economically viable process. Enhancing feedstock carbonation reactivity is key. Heat activation dramatically enhances aqueous serpentine carbonation ...

2016
Stephen O. Ekolu

Amongst the scientific community, the interest on durability of concrete structures has been high for quite a long time of over 40 years. Of the various causes of degradation of concrete structures, corrosion is the most widespread durability problem and carbonation is one of the two causes of steel reinforcement corrosion. While much scientific understanding has been gained from the numerous c...

2017
Camille Crouzet Fabrice Brunet German Montes-Hernandez Nadir Recham Nathaniel Findling Jean-Henry Ferrasse Bruno Goffé

A new process route for the valorization of BOF steel slags combining H2 production and CO2 mineral sequestration is investigated at 300°C (HT) under hydrothermal conditions. A BOF steel slag stored several weeks outdoor on the production site was used as starting material. To serve as a reference, room temperature (RT) carbonation of the same BOF steel slag has been monitored with in situ Rama...

2014
Carl Richard Soderberg

The high contribution of CO 2 emissions associated with pavements has driven research to assess the life cycle of concrete versus asphalt structures and to develop a strategy to reduce the carbon footprint. The life cycle of pavement has been studied with respect to CO 2 emissions in the use phase of concrete as well as after the concrete is demolished. However, only a few have considered the e...

2009
George Alexander M. Mercedes Maroto-Valer

Mineral carbonation is the formation of stable calcium, magnesium, and iron carbonates from the reaction between the metals in common minerals and carbon dioxide. The benign and long-term nature of this CO2 sequestration option has led to ongoing research efforts. Magnesium silicates such as olivine and serpentine have been the focus of mineral carbonation research for the sequestration of CO2 ...

2015
Deborah N. Huntzinger John S. Gierke Wayne D. Pennington

........................................................................................................................ i PREFACE.......................................................................................................................... iii ACKNOWLEDGEMENTS............................................................................................... iv UNIFYING CHAPTER............

2013
Paul M. Wise Madeline Wolf Stephen R. Thom Bruce Bryant

Although many people naively assume that the bite of carbonation is due to tactile stimulation of the oral cavity by bubbles, it has become increasingly clear that carbonation bite comes mainly from formation of carbonic acid in the oral mucosa. In Experiment 1, we asked whether bubbles were in fact required to perceive carbonation bite. Subjects rated oral pungency from several concentrations ...

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