- Modern concrete
is a mixture of Portland cement, water, fine and coarse
aggregate, and, in some cases, various admixtures. When properly
formulated and mixed, the cement cures and hardens to a dense
solid in the chemical process of cement hydration.
- But the matrix
of cement and aggregate can deteriorate or otherwise sustain
damage. Concrete can be highly porous, allowing water to
penetrate; if freezing occurs, the resulting expansion can
weaken the concrete from within. Moisture can carry salts into
the concrete, causing damage or attacking the steel reinforcing
rods embedded in the concrete.
- Concrete has
low tensile strength and ductility and adding reinforcement is
necessary to resist stresses and strains in structural members.
Steel fiber reinforcement provides superior resistance to
cracking and crack propagation under any type of load by
compensating these shortcomings.
- The chief
function of a protective coating is to prevent moisture and
oxygen from reaching the substrate.
- The chief
function of a protective coating is to prevent moisture and
oxygen from reaching the substrate.
- Coatings
provide protection by forming a film that prevents damaging
substances from working into the pores and capillaries of the
concrete.
- Moisture
content and movement loom large in success or failure of
concrete coating and flooring application
- Polymer coating
materials for concrete slabs may include various deck paints,
epoxies, urethanes, acrylics, and other surface-applied liquid
films.It is possible to increase the life of concrete floors by
application of certain materials known as 'hardeners'
- Floor-hardeners
are a mixture of cement, aggregates (quartz, carborundum or iron
particles) and other additives. They consume the rising water
from the green concrete, hydrates and gives a hard-wearing and
dense surface. The floors, thus cast have becomes an extremely
durable, abrasion-resistant surface over a period of time and
provides a fairly tough and wear-resistant surface.
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