Categories
Portland cement

Physical effects of limestone on the hydration of cement clinkers

Effects of limestone addition on the hydration of limestone blended cement can be classified into two aspects, viz. physical effects and chemical effects. Numerous researchers who investigated Portland limestone cement with high level of calcite addition regard it as inert filler, e. g. by means of both thermal and BSE image analysis, it was investigated […]

Categories
Blended cement

Advantage of ternary blended cement

The binary cement, e.g. Portland cement blends with slag or fly ash or limestone, has gained great popularity in many countries. However, each kind of binary cement has its own shortfalls, e.g. the addition limestone can reduce the later strength due to its dilution effect, while the reaction of slag is relatively slow in the […]

Categories
Modelling

Review of several existing models simulating the hydration of cementitious materials

In the late 1980s, Johnson and Jennings wrote a program which was based on the idea that cement hydration is considered as nucleation and growth of spherical particles in three-dimensional space. HYMOSTRUC was built by K. van Breugel, this model is based on the assumption that the growth of new layers of hydration products is […]