Mineral Binder Admixture Composition for Low Viscosity Without Retardation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing admixtures for mineral binder compositions, such as concrete, mortar, and cement, struggle to improve rheological properties like viscosity without requiring additional accelerators, and often face stability and dosage accuracy issues, especially in one-component formulations.
Innovation Solution
A combination of at least one phosphonate group carrying polymer and at least one polyalkoxylated amide or ester of sugar acid is used to synergistically enhance the rheological properties, particularly reducing viscosity, without the need for additional accelerators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If polyalkoxylated amines with phosphonate groups are used as dispersing agents, then viscosity is reduced, but retardation effect on mineral binder compositions occurs
Solution Approach 1:
The patent combines polyalkoxylated amine with phosphonate groups and superplasticizer in a single admixture formulation. This merging allows the dispersing agent to simultaneously achieve viscosity reduction and maintain strength development by integrating multiple functional components that work synergistically, eliminating the need for separate accelerator additions.
Solution Approach 2:
The patent modifies the chemical structure and dosage parameters of the dispersing agent by using specific polyalkoxylated amine compounds with controlled molecular weights and phosphonate group concentrations. By optimizing these parameters, the admixture achieves reduced viscosity without excessive retardation, balancing flow properties with strength development.
2Duration of action of stationary object
If multiple constituents are combined in one admixture, then rheological properties are improved, but stability and shelf-life problems arise
Solution Approach 1:
The patent segments the admixture into distinct functional components: polyalkoxylated amine with phosphonate groups for dispersing and viscosity control, and superplasticizer for enhancing flow properties. This segmentation allows each component to perform its specific function while maintaining overall stability through controlled interaction between the divided functional units.
3Duration of action of moving object
If accelerators are added to counter retardation, then strength development is improved, but set and cure rates become very high
Solution Approach 1:
The patent uses the superplasticizer as an intermediary substance that mediates between the retardation effect of the polyalkoxylated amine and the need for adequate strength development. The superplasticizer enhances the dispersing action and maintains fluidity without requiring high-dosage accelerators, thereby controlling the set and cure rates to reasonable levels.
Data Source
AI summary
The present invention relates to an admixture for mineral binder compositions and mineral binder compositions comprising the same. The admixture comprises at least one phosphonate group carrying polymer and at least one polyalkoxylated amide or ester of sugar acid and is suitable to improve the rheological properties of mineral binder compositions.