An Investigation on the Interfacial Transition Zone in Concrete Using SEM

Hsi Chi Yang; Miao Ying Cheng; Jung Pin Wang

doi:10.4028/www.scientific.net/AMR.446-449.166

Paper Titles

Finite Element Modeling and Structural Behavior of Stainless Steel Plates in Compression
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Nonlinear Finite Element Analysis of Diamond Bird-Beak TX-Joints
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Study on the Influencing Factors of Deflection-Span Ratio under Standard Load in Prestressed Concrete Hollow Slab
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Strain of High-Strength Concrete at Peak Compressive Strength
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An Investigation on the Interfacial Transition Zone in Concrete Using SEM
p.166

Study on the Establishment of Integration Cost Dynamic Model of Construction Project
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Analysis on Orthogonal Test of L-Shaped Concrete-Filled Rectangular Composite Steel Tubular Columns
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Effect of U-Bracket on the Structural Performance of Cold-Formed Steel Angle Connection
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Simplified Design Method of Debris Arch Detention Dams Structure and Its Application in Highway
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 446-449An Investigation on the Interfacial Transition...

An Investigation on the Interfacial Transition Zone in Concrete Using SEM

Abstract:

The technique of linking the SEM (Scanning Electron Microscopy) photographs taken around the interfacial transition zone area is applied to observe the development of hydration products for aggregate and paste at the different curing ages. This research first chooses the aggregate with clay properties not containing the calcium ion, and then observes the hydration products (such as CH, C-S-H) of calcium ion on the aggregate. Finally it assesses if the aggregate will produce ion exchange with cement and generate the hydration products. The very small samples to be observed are taken from the concrete compressive test specimen and must include both aggregate and paste. They are wiped with alcohol to have better pictures before shooting SEM. Initially, the interface of aggregate and paste is sought using 2000x magnification. However, the hydration products on either side of the interface with a range of 50 μm are observed using 10000x magnification. From the results, it is found that aggregate has not interacted with cement paste to produce hydration products and the bond stress of aggregate and paste is controlled by hydration products of paste.