Mathematics: A Tool of Quality Control

by Clyde W. Moore

The design and construction of portland cement plants includes provisions for the required raw materials. The number of raw material streams will be determined by an oxide analysis of the local materials and the need for added supplements. The simplest combination available will probably be a limestone, and a clay or shale, from a local quarry. But would that combination need to be supplemented by sand or a high silica waste product from another process to increase the silica content; or iron ore to adjust the C3A content in the finished cement; or a higher alumina-bearing material?

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Recovery in Sight

buildingThe ripple effect sustained labor market weakness will have on residential and public or private nonresidential and non-building construction over the next two years prompts PCA Chief Economist Ed Sullivan to revise downward his cement consumption and concrete output forecast.

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