Non dispersing concrete flocculant, underwater non dispersing flocculant usage method

Description :

　　Instructions for use

　　1. Underwater non dispersing flocculants are solid powders and should be mixed together with cement and sand in a forced mixer.

　　2. The mixer should be a forced mixer, and the mixing time is generally 3 minutes. If a self falling mixer is used, the mixing time should be doubled.

　　3. When using traditional underwater construction equipment such as conduits and pumps, a low dosage of 1.5-2.0% of non dispersing concrete flocculant can be used underwater; When using land construction equipment such as buckets and chutes, that is, when there is a drop in concrete in water, a high dosage of 2.0-3.0% is directly adopted. In other cases, the dosage can be adjusted appropriately according to the drop in concrete in water, and it is generally recommended to be 2.0-2.5%.

　　4. It is advisable to use a high dosage of 2.0-3.0% for pile sealing, and a low dosage of 1.0-1.5% for the pile body to prevent pile breakage.

　　5. Under normal circumstances, the coagulation time of non dispersing flocculants underwater increases with the dosage. If necessary, they can be used in conjunction with coagulants.

　　6. Priority should be given to using 525 # ordinary silicon cement. If there is no available source, 425 # ordinary silicon cement can be used as a substitute. When the concrete has a drop underwater, the cement dosage should generally not be less than 380kg/m3.

　　7. When adding admixtures (slag or fly ash) to underwater concrete, the pumping performance can be significantly improved.

　　8. The concrete mix proportion should use medium sand, with a recommended sand ratio of 38-43%. The stone grading is generally in the range of 5-25mm, and the large particle size should not exceed 40mm.

　　9. Underwater construction equipment such as conduits and pumps can be used for continuous construction, while open hanging tanks, chutes, handcarts, and other equipment can be used for intermittent feeding construction.

　　10. The construction environment generally requires a static water state, with a concrete drop of less than 0.5m.

　　Non dispersing concrete flocculant factory quality inspection report

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