AGGREGATA TECHNICAL INFORMATION
The General name of such materials as sand, gravel, and crushed stone used in the production of concrete is inert materials. Aggregate, which occupies about 60-75% of the total volume in concrete, is an important component.
Inert materials can generally be divided by size into small, fine-grained (sand, crushing sand for example, produced by grinding gravel, crushed stone, etc.) and large (for example, gravel, crushed stone, etc.).
The most important properties of inert materials are
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Hardness, strength and integrity
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No flimsy components (such as seashell, charcoal, etc.)
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Resistance to pressure and abrasion.
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Do not contain substances that can damage the consistency of concrete (dust, earth, etc.)
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Do not contain flat or long-grained components.
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Do not contain materials that can react with cement.
If the inert materials are contaminated (clay, silt, dust), this will negatively affect the adhesion. As well as the content of fine-grained components will increase the potency of the used water.
Before starting the production of concrete, all the inert materials that will be used must pass a number of checks, sieves, and so on,to meet the quality standards. The components to be used in concrete must comply with TS 706 EN 12620.