цемент

The paper presents research of brittleness cement blends with siliceous additives using impact strength. The advantages of the developed method are simplicity of definition, low cost of equipment and operation. In the presented research were studied additives on the basis of finely ground glass obtained from waste glass containers and pozzolanic additives as fly ash, silica fume and synthetic silica. Increase in additives amount in respect to the cement mass reduces brittleness by ~10 % after 28 days of curing.

Grinding aids (GAs) for cement clinker milling is used to reduce the energy required to achieve a given degree of cement powder dispersion. Some products in the GA, commonly referred to as performance enhancers, have a positive effect on the hydration of cement, improving the strength of the concrete. At grinding of materials simultaneously occur two opposite processes: the destruction of particles by external force and the aggregation of particles, which can be arbitrary, as well as due to external compressive forces.