Preparation of durable magnesium oxysulfate cement with the incorporation of mineral admixtures and sequestration of carbon dioxide

Concrete is the most widely used building material all around the world which has been undergoing many changes aligned with technological advancement. The most recent available type of concrete is high performance concrete which is produced employing different admixtures both chemical and mineral to enhance mechanical and durability qualities. As sustainability emerged as an indispensable factor in concrete industry, many researchers targeted micro sized mineral admixtures such as silica fume, fly ash, rice husk ash, slag and so on in order to replace Portland cement which is known to be responsible for almost 7% of carbon dioxide emission into atmosphere.Recently, technology has made it easy for scientist to study nanoscale admixtures and their effect on structure of concrete. This paper reviews nanomaterials in cement composites and how they can improve different properties of concrete.

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Structural Characterization of a New Magnesium Oxysulfate Hydrate Cement Phase and Its Surface Reactions with Atmospheric Carbon Dioxide

Journal of the American Ceramic Society ◽

10.1111/jace.12556 ◽

2013 ◽

Vol 96 (11) ◽

pp. 3609-3616 ◽

Cited By ~ 62

Author(s):

Tomče Runčevski ◽

Chengyou Wu ◽

Hongfa Yu ◽

Bo Yang ◽

Robert E. Dinnebier

Keyword(s):

Carbon Dioxide ◽

Structural Characterization ◽

Atmospheric Carbon Dioxide ◽

Surface Reactions ◽

Hydrate Cement ◽

Magnesium Oxysulfate ◽

Atmospheric Carbon

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EXPERIMENTAL STUDY OF HIGH STRENGTH CONCRETE OF M90 GRADE USING UNPROCESSED FLY ASH AND SILICA FUME

International Journal of Engineering Applied Sciences and Technology ◽

10.33564/ijeast.2021.v06i05.025 ◽

2021 ◽

Vol 6 (5) ◽

Author(s):

Ajit R. Sapkal ◽

Alankar V. Jadhav ◽

M.V. Nagendra

Keyword(s):

Carbon Dioxide ◽

Fly Ash ◽

Silica Fume ◽

High Strength Concrete ◽

Construction Material ◽

High Strength ◽

Cementitious Materials ◽

Mineral Admixtures ◽

The Sustainable Development ◽

Strength Concrete

– Concrete is the most widely used construction material in overall world due to its various advantages in the infrastructural industries. The production of cement causes atmospheric and environmental pollution by emitting carbon dioxide into the atmosphere. Pozzolonic by products from electrical industries are supplimentory cementitious materials such as GGBS, fly ash, slag, Rice Husk are utilized in recent years as cement alternative material for growing HSC with progressed workability, energy and durability with decreased permeability. High strength concrete (HSC) is made with adding mineral admixtures like silica fume, fly ash in the concrete. Using cementitious materials such as unprocessed fly ash and silica fume in the High strength concrete mix gives benefits in various ways. Also these materials reduces emission of carbon dioxide in the atmosphere. So that, It gives an environment friendly concrete for the sustainable development. Preparing high strength concrete by using these cementitious materials with super plasticizers gives required strength.

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Electron Cytochemical Study of Carbon Dioxide Laser Effect on Rhesus Monkey Cornea

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010005113x ◽

1974 ◽

Vol 32 ◽

pp. 224-225

Author(s):

K. C. Tsou ◽

J. Morris ◽

P. Shawaluk ◽

B. Stuck ◽

E. Beatrice

Keyword(s):

Carbon Dioxide ◽

Electron Microscope ◽

Rhesus Monkey ◽

Carbon Dioxide Laser ◽

Cytochemical Study ◽

Laser Effect

While much is known regarding the effect of lasers on the retina, little study has been done on the effect of lasers on cornea, because of the limitation of the size of the material. Using a combination of electron microscope and several newly developed cytochemical methods, the effect of laser can now be studied on eye for the purpose of correlating functional and morphological damage. The present paper illustrates such study with CO2 laser on Rhesus monkey.

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The Critical Point Drying Method Applied to Scanning Electron Microscopy of L-929 Cells

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100068382 ◽

1970 ◽

Vol 28 ◽

pp. 278-279

Author(s):

Charles TurnbiLL ◽

Delbert E. Philpott

Keyword(s):

Electron Microscopy ◽

Carbon Dioxide ◽

Surface Tension ◽

Critical Point ◽

Freeze Drying ◽

Attractive Alternative ◽

Crystal Formation ◽

Critical Point Drying ◽

Time Required ◽

Scanning Electron

The advent of the scanning electron microscope (SCEM) has renewed interest in preparing specimens by avoiding the forces of surface tension. The present method of freeze drying by Boyde and Barger (1969) and Small and Marszalek (1969) does prevent surface tension but ice crystal formation and time required for pumping out the specimen to dryness has discouraged us. We believe an attractive alternative to freeze drying is the critical point method originated by Anderson (1951; for electron microscopy. He avoided surface tension effects during drying by first exchanging the specimen water with alcohol, amy L acetate and then with carbon dioxide. He then selected a specific temperature (36.5°C) and pressure (72 Atm.) at which carbon dioxide would pass from the liquid to the gaseous phase without the effect of surface tension This combination of temperature and, pressure is known as the "critical point" of the Liquid.

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