SYMPOSIA PAPER Published: 01 January 1990

The Use of Large-Area Thin Sectioning in the Petrographic Examination of Concrete


Large-area thin sectioning of a concrete core allows examination of micro-textural detail that is not observable by other petrographic techniques. Because the area of the section represents a large sampling of the core, this allows the relationship of faults and deterioration to both the outer surface and the internal texture to be determined and gives a good estimate of the degree of damage present in the concrete. The usefulness of the technique is illustrated by cases of alkali-aggregate reaction, soft water attack, high temperature corrosion and carbonation, and other textural faults in concrete. It is concluded that especially in the case of alkali-aggregate reaction the examination of large-area thin sections should be the preferred technique for microscopy as it appears to provide the range of textural information necessary for unequivocal diagnosis.

Author Information

St.John, DA
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: C09
Pages: 55–70
DOI: 10.1520/STP23452S
ISBN-EB: 978-0-8031-5122-2
ISBN-13: 978-0-8031-1452-4