Three major contradictions must be resolved in the formulation design of self-leveling compounds.
Release Time:
2021-07-26
Source:
Self-leveling mortar
With the ongoing advancement of concrete toward higher strength and superior performance, high-performance water-reducing admixtures with ultra-dispersing capabilities have become indispensable components in high-performance concrete. Among the various types of such admixtures, polycarboxylate-based superplasticizers, characterized by their comb-like molecular structure, stand out for their high water-reducing efficiency, low dosage requirements, minimal slump loss over time, and excellent compatibility with cement, making them the dominant product in both domestic and international chemical admixture markets.
At present, the application of polycarboxylate-based high-performance water-reducing admixtures has gradually become widespread in both domestic and international construction projects, with extensive use in high-rise buildings, bridges, and other types of infrastructure. In recent years, the advent of bulk-supplied powdered polycarboxylate water reducers has further highlighted their increasingly pronounced advantages in self-leveling concrete applications.
Self-leveling mortar is a high-tech mortar product. This is because the formulation design of self-leveling mortar must resolve three major contradictions:
1) The conflict between retardation and early strength;
2) The conflict between high fluidity and anti-settling properties;
3) The contradiction between contraction and expansion.
