Page 55 - PH_Masonry_Final_Ver 1_July 2020
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Herringbone bond
Often used as infill to timber frame buildings, the bricks are laid at 45° in a zig-zag pattern.
Construction joints
It is often not possible to complete a job at one go, for example because of the size or complexity
of the structure or because of limited materials or manpower. When work resumes it will be nec-
essary to place fresh concrete on or against the previous pour that will have already hardened.
The resultant contact surface is known as a construction joint or day work joint. Such joints
must be formed carefully so that they transmit the required forces and, where appropriate, do not
leak. Firstly the surface of the hardened concrete must be clean and free from laitance (the rela-
tively soft surface layer) and any dust or debris. If it is too hard, hand-held tools or abrasive blast-
ing will be necessary. Then the fresh concrete must be place and compacted so that it bonds
properly to the surface of the previously place concrete.
Participant Handbook : Masonry 55
