Relation Between Bond and the Surface Physics of Masonry Units
Abstract:While the author and his colleagues were doing research work with mortars, it was noticed that many brick had high capillarity on rough or sanded surfaces and little or none on others. This led to bond tests during which it became evident that there was a relation between the kind of surface on a unit and the amount of bond. Further experiments with chimneys or wells showed that (1) leakage and extent of dye penetration coincided closely with the previous laboratory bond tests, (2) there was excellent bond and practically no dye penetration with smooth brick, which had little or no capillarity, (3) bond decreased and dye penetration increased according to the surface, and (4) as the capillarity of the surface increased, the bond decreased. It became apparent that while there are differences in mortars in respect to bond, these differences are rather small when compared with the effect caused by the surfaces of masonry units.
Document Type: Research Article
Affiliations: The Detroit Edison Company, Detroit, Michigan
Publication date: April 1, 1953