Properties and Microstructure of the New Phosphate Bonded Magnesia Cement

Zhu Ding; Zongjin Li; Feng Xing

doi:10.4028/www.scientific.net/KEM.302-303.543

Paper Titles

Study on Distribution Feature of Fracture Toughness of Interface between Coarse Aggregate and Hardened Cement Mortar in Concrete
p.514

Static Properties of Plain Reactive Powder Concrete Beams
p.521

Pore Structure and Chloride Ion Transport Mechanisms in Concrete
p.528

Experimental Study on Stress-Strain Relationship of New-Old Concrete
p.536

Properties and Microstructure of the New Phosphate Bonded Magnesia Cement
p.543

Effects of Styrene-Acrylate Emulsion on the Damping Ability and Hydration of Cement Matrix
p.550

Static Loading Investigation on Well Cover of Reactive Powder Concrete
p.556

Study on Strength and Bond Characteristics of GGBS Concrete
p.561

Relationship between Test Results of the ACSIRO and ASTM C1202 Methods
p.567

HomeKey Engineering MaterialsKey Engineering Materials Vols. 302-303Properties and Microstructure of the New Phosphate...

Properties and Microstructure of the New Phosphate Bonded Magnesia Cement

Abstract:

A novel phosphate bonded magnesia cement was developed recently, which sets quickly and develops high strength in the early ages. In the present research, the physical and mechanical properties, hydration products, and microstructure of the new cement were investigated. The new cement was mainly consists of dead burned magnesia, phosphate and fly ash. The results showed that it not only has high early strength, but also has high long-term strength. Interestingly, the strength of the cement increase with the content of fly ash, from 10 % - 40 % by weight. The hardened cement paste has a dense microstructure, low open porosity and water sorptivity due to the low water to binder ratio. The reaction products after hydration of the cement includes struvite mineral and amorphous species.

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Periodical:

Key Engineering Materials (Volumes 302-303)

Pages:

543-549

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.302-303.543

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Online since:

January 2006

Authors:

Zhu Ding, Zongjin Li, Feng Xing

Keywords:

Fly Ash (FA), Magnesia, Mechanical Property, Microstructure, Phosphate Cement, Physical Properties, Sorptivity

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