Quick-setting admixture and spray concrete
The quick-setting admixture with calcium aluminate and alkaline earth metal sulfate addresses nozzle clogging and mixing issues, providing uniform concrete with superior strength development.
JP2026001912APending Publication Date: 2026-01-08TAIHEIYO MATERIALS CORP
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Patent Information
- Application Number
- JP2024099496
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2026-01-08
AI Technical Summary
Technical Problem
Conventional powder quick-setting admixtures set in a very short time, leading to potential nozzle clogging or insufficient mixing, resulting in uneven concrete properties and inferior strength development.
Method used
A quick-setting admixture containing calcium aluminate with a specific molar ratio, alkaline earth metal sulfate with defined particle sizes, and optional alkali metal sulfate and carbonate, ensuring both quick-setting performance and material mixability.
Benefits of technology
The admixture achieves good quick-setting performance, material mixability, and excellent strength development, preventing nozzle clogging and ensuring uniform concrete quality.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a quick-setting admixture which ensures good quick-setting performance and mixability of materials and is excellent in strength developability, and to provide spray concrete.SOLUTION: A quick-setting admixture comprising calcium aluminate having a molar ratio of the contents of CaO and Al2O3 as chemical components (CaO / Al2O3) of from 1.8 to 2.7, sulfates of alkali metals, sulfates of alkaline earth metals and aluminum sulfate, wherein the content of the calcium aluminate is from 55 to 79 mass% based on the total mass of the quick-setting admixture, in the particle size of the sulfate of the alkaline earth metal, the mass ratio of particles of ≤1.5 μm is 33-52 mass% and the mass ratio of particles of ≥10.5 μm and ≤100 μm is 10-29 mass% based on the total amount of the sulfate of the alkali metal.SELECTED DRAWING: None
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