When using concrete anti-segregation agents, you need to pay attention to the following points:
1. Select the correct type of antisegregation agent. Commonly used types include alumina, diatomite, cellulose, etc. The appropriate type should be selected according to the requirements of the concrete, and its dosage should be strictly controlled. Excessive use will affect the strength of concrete.
2. Activated anti-segregation agent. Some anti-segregation agents require activation treatment before use, such as prewetting or crushing treatment, to activate their surface and enhance water absorption and modification properties. Lack of vitality will affect its effectiveness.
3. Dry storage. Anti-segregation agents should be stored in a cool, dry environment to prevent deliquescence or agglomeration. The storage time should not be too long, otherwise the performance will gradually decay and affect the segregation prevention effect.
4. Evenly dispersed. When the anti-segregation agent is evenly sprinkled into wet concrete, it should be mechanically stirred to fully disperse it evenly without clumps. Otherwise, its water absorption will be greatly reduced and the best effect will not be achieved.
5. Ensure sufficient stirring time. Wet concrete with anti-segregation agent added must have sufficient mixing time, usually more than 3-5 minutes. This allows it to fully unfold and moisten, achieving its full effect. Time that is too short will cause local concentration and affect uniformity.
6. Combined with water reducing agent. In high-strength concrete, the effect of anti-segregation agent will be better, but it needs to be used in conjunction with water-reducing agent. Due to the addition of water reducing agent, the concrete can maintain high fluidity, which is conducive to the dispersion and function of the anti-segregation agent. The correct use of concrete anti-segregation agents is crucial to ensuring concrete quality.
The above 6 points can comprehensively guide engineering and technical personnel to select appropriate anti-segregation agents and use them correctly, so as to achieve the best effect of preventing concrete segregation and improving concrete performance. . </p
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