What is meant by Ferro cement?
Ferrocement or ferro-cement is a system of construction using reinforced mortar or plaster (lime or cement, sand and water) applied over an "armature" of metal mesh, woven expanded-metal or metal-fibers and closely spaced thin steel rods such as rebar.
What is cement chemically?
Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore.
Which compound has the maximum heat of hydration?
Which halogen has the highest heat of hydration?
What is heat of hydrogenation?
Heat of hydrogenation (symbol: ΔHhydro, ΔHº) of an alkene is the standard enthalpy of catalytic hydrogenation of an alkene. Catalytic hydrogenation of an alkene is always exothermic. ... Heat of hydrogenation of alkenes is a measure of the stability of carbon-carbon double bonds.
What is heat of hydration?
The heat of hydration is the heat generated when water and portland cement react. Heat of hydration is most influenced by the proportion of C3S and C3A in the cement, but is also influenced by water-cement ratio, fineness and curing temperature. As each one of these factors is increased, heat of hydration increases.
Is heat of hydration positive or negative?
The hydration enthalpy is the enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution. Hydration enthalpies are always negative.
Which materials are added to reduce heat of hydration?
Several previous researchers have tried to reduce hydration heat by replacing a certain amount of cement with pozzolanic materials, such as silica fume, fly ash, and oil palm fuel ash.
How do you reduce the heat of hydration?
To reduce the heat of hydration, water reducers and / or high range water reducers are used to minimize both cement and water contents. The consistency of mass concrete should be as stiff as possible albeit still workable enough for the mix to be adequately placed and compacted.
What is the heat of hydration of CuSO4?
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