The Temperature Impact on the Various Cement Type Consistency

The article deals with the temperature of the fresh cement pastes (CP) prepared from various type of cement in connection to its consistency. The aim of the experiment was to simulate the real condition at a concrete mixing plant with the comparison of laboratory method of cement testing – test of water need for achieving the normal consistency. In the experiment, cement types CEM I 42.5 R, CEM II/A-LL 42.5 R, CEM II/B-S 42.5 N, CEM III/A 32.5 R and CEM III/A 32.5 N were used. Results from the previous experiment with CEM II/A-S 42.5 R were adopted. Particular water-cement ratios were determined within each of cement type and stayed the same for each of CP temperatures. Increasing of temperature of the CP was achieved by mixing water with various temperatures. Different behavior of consistency change with increasing of temperature within different cement composition was observed. Approach to methods of cement testing at the concrete plant as well as using different cement type in different season of the year in context of durability and sustainability were also discussed.