Concrete

Notes about Concrete · Concrete ingredients: cement, water and small stones. · Concrete is very strong in compression. It is fireproof and weatherproof. It molds to any shape. · Concrete is weak in tension, It cracks with temperature changes. · Concrete was employed in ancient Egypt. ·  Reinforced Concrete has the tension strength of steel and concrete compression. It used for walls, floors, pipes and arches. · Among the applications of concrete, may include its use as a basis for supporting wooden platforms. · The first development of concrete, was the concrete shell construction (concrete and steel), which allows the construction of large domes and cupolas. ·  The second invention is a precast-concrete construction (bricks, slabs) which is Waterproofing and solidity.  · Finally there is the prestressed concrete, which has the ability to carry heavy loads.

Definitions: ü <span style="color: #ff6600; mso-bidi-font-weight: bold; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US;">Concrete is a manufactured mixture of cement and water, with aggregates of sand and stones, which hardens rapidly by chemical combination to a stonelike, water-and-fire-resisting solid of great compressive but low tensile strength.

<span style="font: 7pt 'Times New Roman'; color: #ff6600; mso-bidi-font-family: Calibri; mso-ansi-language: EN-US; mso-bidi-theme-font: minor-latin; msobidifontfamily: Calibri; msoansilanguage: EN-US; msobidithemefont: minor-latin; msolist: Ignore;"> Reinforced concrete <span style="font: 7pt 'Times New Roman'; color: #ff6600; mso-bidi-font-family: Calibri; mso-ansi-language: EN-US; mso-bidi-theme-font: minor-latin; msobidifontfamily: Calibri; msoansilanguage: EN-US; msobidithemefont: minor-latin; msolist: Ignore;"> Pre-cast concrete



Prestressed concrete

Concrete-shell