- 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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