Concrete is a mixture of Portland cement, water, aggregates, and sometimes admixtures that hardens and binds the aggregates together. It is a versatile construction material that is strong, durable, and economical. Concrete can be molded into any shape and reproduces any surface texture, making it the most widely used construction material in the world. The key ingredients in concrete are water, aggregates like sand and gravel, reinforcement like rebar, and cement, which is a binder made from calcium silicates and other calcium compounds. Proper curing of concrete by keeping it moist is important for achieving good durability, strength, and resistance to cracking.
2. Construction material
Mixture of Portland cement, water, aggregates, and in some cases,
admixtures.
The cement and water form a paste that hardens and bonds the
aggregates together.
often looked upon as “man made rock”.
versatile construction material, adaptable to a wide variety of agricultural
and residential uses.
Strong, durablele, versatile, and economical.
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3. Can be placed or molded into virtually any shape and reproduce any
surface texture.
The most widely used construction material in the world.
In the United States almost twice as much concrete is used as all
other construction materials combined.
The ready-mix concrete producer has made concrete an appropriate
construction material for many applications.
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4. Water
Aggregates
Reinforcement
Chemical admixtures
Cement
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5. Great water is basic for quality cement.
Ought to be adequate to drink- - free of waste, natural
matter and unnecessary chemicals as well as minerals.
The quality and different properties of cement are
exceptionally subject to the measure of water and the
water-concrete proportion.
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6. Totals involve 60 to 80 percent of the volume of cement.
Sand, rock and smashed stone are the essential totals utilized.
All totals must be basically free of residue as well as natural matter.
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8. Crystalline compound of calcium silicates and other calcium mixes having water
powered properties.
Considered pressure driven in view of their capacity to set and solidify under or with
overabundance water through the hydration of the bond's synthetic mixes or minerals
Uses
Main use is in the fabrication of concrete and mortars
Modern uses
-Building (floors, beams, columns, roofing, piles, bricks, mortar, panels, plaster)
-Transport (roads, pathways, crossings, bridges, viaducts, tunnels, parking, etc.)
-Water (pipes, drains, canals, dams, tanks, pools, etc.)
-Civil (piers, docks, retaining walls, silos, warehousing, poles, pylons, fencing)
-Agriculture (buildings, processing, housing, irrigation)
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9. The ease with which freshly mixed concrete can be placed and
finished without segregation.
Difficult to measure but ready-mix companies usually have
experience in determining the proper mix.
Important to accurately describe what the concrete is to be used for,
and how it will be placed.
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10. Solid that has been indicated, clustered, blended, set, and completed "letter-
impeccable" can even now be a disappointment assuming dishonorably or
deficiently cured.
Normally the last stride in a solid venture and, tragically, is regularly ignored
even by experts.
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11. Curing has a major influence on the properties of hardened concrete
such as durability, strength, water-tightness, wear resistance,
volume stability, and resistance to freezing and thawing.
Proper concrete curing for agricultural and residential applications
involves keeping newly placed concrete moist and avoiding
temperature extremes (above 90°F or below 50°F) for at least three
days.
A seven-day (or longer) curing time is recommended.
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