无机非金属材料专业英语

张文星

目录

  • 1 chap1 Physical chemistry of inorganic materials
    • 1.1 Types of bonds in crystals
    • 1.2 Silicate structures
    • 1.3 Defect crystal chemistry
    • 1.4 Surfaces and colloids
    • 1.5 Diffusion
  • 2 chap2 Ceramics
    • 2.1 Ceramic fabrication process: conventional routes to ceramics
    • 2.2 Treatment after firing: grinding and glazing
    • 2.3 Electronic ceramics: electrical insulators and conductors
    • 2.4 Optical ceramics
    • 2.5 Bioceramics: medical applications of ceramics
    • 2.6 Advanced structural ceramics
  • 3 chap3 Glass
    • 3.1 Structure of glass
    • 3.2 Glass formation
    • 3.3 Manufacture of glass: present trend in industrial glass melting
    • 3.4 Glass properties
    • 3.5 Special glass
    • 3.6 Glass ceramics
  • 4 chap4 Cement and concrete
    • 4.1 Portland cement
    • 4.2 Hydration of portland cement
    • 4.3 Oil well cementing
    • 4.4 Concrete chemistry
  • 5 chap5 Refractories
    • 5.1 Materials development in refractories during the 20th century
    • 5.2 Refractory bonds and binders
    • 5.3 Thermomechanical properties of refractories
    • 5.4 Glassmaking refractories
  • 6 chap6 Gemmology
    • 6.1 An introduction to the geology of Gem materials
    • 6.2 Mechanical properties of gemstones
    • 6.3 Optical properties of cut gemstones
    • 6.4 Diamond
  • 7 chap7 Inorganic materials engineering
    • 7.1 Furnaces
    • 7.2 Storage (Silo)
    • 7.3 Raw materials and mixing
    • 7.4 Primary forming operations (I)
Hydration of portland cement


Unit 19 Hydration of Portland Cement


  The silicates and aluminates present in cement react with water to form products of hydration and in time, these to a hard mass. The different anhydrous phases have very different cementitious properties, C3S hydrates rapidly and develops high early strength whereas β-C2S hardens more slowly. Hydration products of C3A and C4AF have very little strength. The hydration of commercial cement can be represented approximately by the summed hydration of the components. C3S is the phase mainly responsible for the initial hardening; C3S and β-C2S give set cement and concrete its long time strength.

  Hydration of cement is a complicated process and part of the difficulty in studying it is that the main products of hydration are either gelatinous or poorly crystalline, thus making conventional X-ray diffraction studies extremely difficult.