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In this report construction chemicals are defined as chemical compounds that
are added as such or in formulations to or on construction materials at the
construction site in order to improve workability, enhance performance, add
functionality or protect the construction material or the finished structure
made out of it. They undergo chemical reactions (e.g., cross-linking) or physical
changes (e.g., solidification from melt) during their application. The following
groups of chemicals will be discussed:
- Concrete admixtures
- Asphalt additives
- Adhesives and sealants
- Protective coatings
Worldwide, the construction industry contributes significantly to the global
GDP, and is one of the most important elements of every economy. Today’s
demands on buildings, roads, bridges, tunnels and dams could not be met without
construction chemicals. The strength of concrete has risen dramatically due
to the development of construction chemicals. The diameter of a pillar needed
to carry 100 tons was reduced from 100 cm to 10 cm between 1920 and 2004. The
cross section of such a pillar is one-hundredth of what was needed in 1920.
High-rise buildings must provide maximum space on minimum ground.
The raw materials needed for the production of construction chemicals are
manufactured by the large chemical producers. Polymers are the most important
group of raw materials and are found in virtually every construction chemical
formulation ranging from adhesives to waterproofing treatments. The development
of new construction chemicals in many cases requires interaction of the chemical
producer, construction chemical manufacturer and end user.
Protective coatings are the most important group of construction chemicals,
followed by adhesives and sealants, concrete admixtures and asphalt additives.
Construction chemicals will certainly gain importance in the future. While
in some regions, the construction of new buildings will predominate, the focus
will shift to renovation in the older economies. This will directly influence
the usage patterns—concrete admixtures are predominately used for new
buildings while more adhesives and sealants are consumed during renovation. |
