ค้นหา "*nation*" ใน คำศัพท์/สำนวนทั้งหมด

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Carbonation

(Concrete Engineering) 1) Reaction between the products of portland cement (soluble calcium hydroxides), water and carbon dioxide to produce insoluble calcium carbonate (efflorescence). 2) Soft white, chalky surface dusting of freshly placed, unhardened concrete caused by carbon dioxide from unvented heaters or gasoline powered equipment in an enclosed space. 3) Carbonated, dense, impermeable to absorption, top layer of the surface of concrete caused by surface reaction to carbon dioxide. This carbonated layer becomes denser and deeper over a period of time. 4) Reaction with carbon dioxide which produces a slight shrinkage in concrete. Improves chemical stability. Concrete masonry units during manufacturing may be deliberately exposed to carbon dioxide after reaching 80% strength to induce carbonation shrinkage to make the units more dimensionally stable. Future drying shrinkage is reduced by as much as 30%.

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คำศัพท์ที่เกี่ยวข้องกับ "nation"

National fine thread

international ampere

Carbonation

The examination is right around the corner

Imagination is more important than knowledge

The difference between the impossible and the possible lies in a man's determination

nation

abomination

abomination

agglutination

alienation

alienation