4.2.4.1 Chemical Admixture - PowerPoint PPT Presentation
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4.2.4.1 Chemical Admixture
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Title: 4.2.4.1 Chemical Admixture
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4.2.4.1 Chemical Admixture
4.2.4 Concrete Admixture
- Introduction
- Water-Reducing Admixture
- Hardening Accelerator
- Air Entraining Admixture
- Set Retarding Admixture
- Flash Setting Admixture
- Expanding Admixture
- Frost-resistance Admixture
4.2.4.2 Mineral Admixture
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Frost-resistance admixture
- Definition
- It makes concrete gain strength normally in
negative temperature and plays the role of lowing
freezing point, anti-freezing and accelerating
strength gain in concrete. - Common types
- NaNO2 and Ca(NO2)2 mixing 1-8
- CaCl2 and NaCl mixing 0.5-1
- Performance
- Lowing freezing point
- Frost-resistance
- Accelerating strength gain
