Under the microscope

Article Abstract:

The visual and microscopic combination technique, petrography is used in the forensic investigations of concrete structures to accurately determine the causes of failure. Data show that the technique provides information about cement content, material composition, air content, water/cement ratio, and process of deterioration. Case studies are presented.

Methods, Usage, Microscope and microscopy, Microscopes, Microscopy, Petrology

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Researchers speed up concrete aging

Article Abstract:

This article reports on a research finding to accelerate aging of the concrete. Results indicate that one day of aging in the new method is equivalent to 300 days of aging in the constructed structures.

Standards, Brief Article, Building materials, Production processes, Cement, Cements (Building materials)

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An avoidable tragedy

Article Abstract:

Reasons for collapse of Scaffold platform at Chicago's John Hancock Center based on Simpson Gumpertz & Heger Inc.'s investigations

Legal issues & crime, Sheet Metal Work Manufacturing, Sheet metalwork, Metal Scaffolding, Company legal issue, Investigations, Building failures, Properties, Scaffolding, Metal, John Hancock Center (Building), Simpson Gumpertz and Heger Inc.

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