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State whether the following is true or false.
Adding a non-shrinking filler reduces the overall firing shrinkage of a body.

  • A.False
  • B.True only at large scales
  • C.False only at small scales
  • D.True

Answer: D

The filler contributes nothing to the contraction, so the average falls in proportion to how much of the body it makes up. This is the principal reason grog is used in heavy clay and refractory work. Section thickness largely dictates how much filler is required.

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