The accelerator is an admixture that is added to concrete to quickly solidifies the concrete. The main types are inorganic salts and organic materials. Powdery solids, whose dosage is only 2% ~ 3% of cement in concrete, can coagulate the concrete within 5min, and then coagulate at 10min. In order to meet the purpose of rapid solidified concrete in the repair or shaft. It is an indispensable additive in shotcrete construction. Their role is to accelerate the hydration hardening of the cement and to form enough strength in a short time to ensure special construction requirements.
1. Coagulation time: 1 ~ 5min of initial coagulation and 5 ~ 10min of coagulation, suitable for 3 to 5 percent of the dosage of gelation materials;
2. Alkali metal content < 1%, non-toxic, tasteless and unstimulating;
3. Fineness: 80 mu m hole sieve, the residue is less than 10%;
4. The early strength of the shotcreting concrete is high, and the strength of compressive strength is 80 to 100% in 28 days.
5. Good adhesive bonding, no rust effect on the steel bar, improve the anti-seepage label, quick condensation, thick spray layer, 130mm spray, and more than 200mm spray wall.
Matters needing attention
Please don't add the goods when material mixing, gravel, sand contains a large number of moisture, suction accelerator short-term time, without injection decomposition of its speed, condensed affect the setting time, reduce the strength of concrete, will lead to the adverse effect of sprayed concrete. Before use, the test should be carried out for the test of the cement varieties used in the project, and the quantity of mixing can be used in large quantities. Storage of expired cement cannot be used. Cement that does not meet national standards cannot be used. Proper storage of the accelerator is required to prevent the failure of the damp. To strengthen early water spraying and ensure the later strength. Strict control of the water-cement ratio. Water seepage works must be increased in quantity.
Method of use
The sprayed concrete is mixed to mix the sprayed material, and the accelerator is added randomly during the injection. It is recommended that you choose suitable dosage and coagulation time test before using.
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