This service is mandated by District of Columbia Official Code 5-631 et seq.
It is critical that the specified public safety group members continue treatment and program requirements presently mandated by law.
Petrographers do most of their work with microscopes that use reflected light (stereomicroscope), transmitted light (petrographic microscope) and electron beams (scanning electron microscope, SEM) to identify basic components in concrete, study cracks and microcracks, and identify secondary deposits that form when concrete deteriorates, such as gel from alkali-silica reaction.
Petrographers learn a great deal not only about what is in the concrete, but how workmanship and environmental conditions affect performance.
The scope of includes, but is not restricted to, new works and repair and maintenance of the following: bridges, high-rise buildings, dams, civil engineering structures, silos, highway pavements, tunnels, water containment structures, sewers, roofing, housing, coastal defences.
At a time when the pressure is on all engineers, architects and contractors to optimise use of new materials and up-to-date technologies, provides essential information that will help improve efficiency, productivity and competitiveness in world markets.
It is therefore vital reading for all professionals and academics involved with research into, or specification of, building materials.
Author duties: Acceptance of a manuscript for publication in the journal carries with it an understanding that the author, when requested, will fulfil an obligation to contribute their expertise to the review of others' manuscripts.