- Proper Mix Design: When incorporating silica fume into your mix design, it’s essential to adjust other mixture components to achieve the desired workability and performance. A typical dosage of silica fume in a concrete mix is 5% tot 15% per gewicht cement.
- Water Content: Silica fume generally requires more water than conventional concrete due to its high surface area. Echter, adding more water can result in a lower strength mix. Daarom, waterreducerende hulpstoffen worden vaak gebruikt in combinatie met silica fume om de nodige verwerkbaarheid te bereiken zonder aan sterkte in te boeten.
- Mengen: Siliciumdamp moet langzaam aan het mengsel worden toegevoegd om klonteren te voorkomen en een grondige verspreiding te garanderen. De mengtijd na toevoeging van silicafume moet voldoende zijn om ervoor te zorgen dat de silicafume volledig door het mengsel wordt verspreid.
- genezen: Silica Fume-beton moet goed worden uitgehard om zijn volledige potentiële sterkte te bereiken. Curing should be started as soon as possible and continue for a longer period compared to conventional concrete.
- Use of Admixtures: High-range water reducers (HRWR), or superplasticizers, are usually needed in silica fume concrete mixes to improve workability. Without these, the mix can be very stiff and difficult to handle and place.
- Safety: Silica fume is a fine powder, like cement, and is harmful if inhaled. Daarom, necessary safety precautions, including masks and eye protection, should be used when handling silica fume.
- Kwaliteitscontrole: As with all components of concrete, it is crucial to have a rigorous quality control program in place to ensure consistency and meet the project’s specifications.
- Training: All personnel involved in the mixing, placement, and curing of silica fume concrete should be properly trained to understand the characteristics of the material and the need for accurate proportioning, thorough mixing, proper placement, and extended curing.
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