Temperature is one of the most important factors affecting the efficiency of polymer admixtures to concrete, yet this relation is still not fully explained.The direction of changes depends on the type (chemical nature) of the admixture, and often also on its concentration and composition of the concretemix. Taking into consideration the big diversity of the used polymer admixtures, it is very hard to predict their temperature characteristics; this requires detailed testing. It is possible to find out, on the base of the collected data, that in the case of the new generation of the superplasticizers an increase of temperature usually leads to diminishing of the admixture efficiency. This means the necessity of increasing dosage of the superplasticizers of new generation at higher temperature.
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Przedstawiono współczesne trendy w wykonywaniu betonów cementowych. Scharakteryzowano podstawowe cechy, jakim powinny odpowiadać betony cementowe nowej generacji, o znacznie większej trwałości oraz rolę domieszek polimerowych w uzyskiwaniu tych betonów.
EN
There were introduced present tendency in executing of cement concretes. Characterized the basic properties of new generation cement concretes (with considerably larger durability) as well as the role of polymer admixtures in produce process these concretes.
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