gear reducer - ορισμός. Τι είναι το gear reducer
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Τι (ποιος) είναι gear reducer - ορισμός

ADMIXTURE DECREASING THE WATER CONTENT OF CONCRETE
Water Reducer

reduction gear         
  • thumb
  • thumb
  • Double reduction gears
  • An Agricola illustration from 1580 showing a toothed wheel that engages a slotted cylinder to form a gear train that transmits power from a human-powered treadmill to mining pump.
  • Two meshing gears transmit rotational motion.
  • Illustration of gears of an automotive transmission
INTERCONNECTED SERIES OF TWO OR MORE GEARS IN A MACHINE
Gear ratio; Gear drive train; Geartrain; Gear ratios; Reduction gear; Reduction gearing; Final drive ratio; Velocity ratio; Double reduction gearing; Gear trains; Speed ratio; Low gear; Gear-ratio; Orbitless drive; Gear Ratio
¦ noun a system of gearwheels in which the driven shaft rotates more slowly than the driving shaft.
Spur gear         
SIMPLEST TYPE OF GEAR
Spur gear teeth; Spur gear corrected tooth
Spur gears or straight-cut gears are the simplest type of gear. They consist of a cylinder or disk with teeth projecting radially.
Crush Gear Turbo         
JAPANESE ANIME TELEVISION SERIES
Crush Gear; Gekitou! Crush Gear Turbo; FIGHT! Crush Gear Turbo; Crush Gear Nitro; Gekito! Crush Gear Turbo
, also known just as Crush Gear, is an anime and manga series about people who throw mechanical vehicles into a large ring to fight and "crush" each other. The 68-episode anime series produced by Sunrise aired across Japan on Animax from October 7, 2001 to January 26, 2003.

Βικιπαίδεια

Water reducer

Water reducers are special chemical products added to a concrete mixture before it is poured. They are from the same family of products as retarders. The first class of water reducers was the lignosulfonates which has been used since the 1930s. These inexpensive products were derived from wood and paper industry, but are now advantageously replaced by other synthetic sulfonate and polycarboxylate, also known as superplasticizers.

Water reducers offer several advantages in their use, listed below:

  • reduces the water content by 5-10%
  • decreases the concrete porosity
  • increases the concrete strength by up to 25% (as less water is required for the concrete mixture to remain workable)
  • increases the workability (assuming the amount of free water remains constant)
  • reduces the water permeability (due to less water being used)
  • reduces the diffusivity of aggressive agents in the concrete and so improves the durability of concrete
  • gives a better finish to surfaces (due to all of the above)