Hemihydrate
Definition
Calcium-sulfate phase with less structural water than gypsum, used as a plaster precursor. Material processing and hydration history affect the phases present. A phase name does not establish a unique product or source.
- Context
- Plaster materials
For example, examining a plaster-related mixture may require distinguishing precursor and hydrated phases rather than assigning one name to the whole material.
Interpretation may require appropriate compositional or diffraction analysis of a mixture.
Related terms
- Aggregate
- The granular filler (sand, gravel, crushed rock) that occupies 60-80% of a concrete volume; its mineralogy, grain shape, and size distribution are...
- C-S-H
- Calcium-silicate-hydrate, often abbreviated C-S-H, is a major binding component of hydrated cement with variable composition and generally poor crystallinity. Its behaviour depends...
- Clinker
- Clinker is an intermediate material produced during cement manufacture by high-temperature processing of suitable raw materials. It contains phases that react during...