expanded cement

Our company has researched and developed expansion cement based on the current domestic and foreign concrete development trends and waterproofing requirements. Using this cement, there is no need to add any waterproofing materials, which can greatly improve the cracking and anti-seepage performance of concrete. At the same time, it also has the ability to compensate for shrinkage. , comprehensive functions of anti-freeze and corrosion resistance.

1. Technical performance

1. Anti-permeability: the anti-permeability grade can reach S30 or above; using this cement to prepare self-waterproof concrete saves labor and materials, shortens the construction period, and has high durability Good;

2. Freeze resistance: the frost resistance grade can reach D300;

3. Corrosion resistance: the ability to resist sulfate corrosion is significantly improved;

4 ． The new type of expanded cement has high strength in the early stage, greater strength growth in the later period, and stable long-term strength increase;

5. The initial setting time is not earlier than 45 minutes, and the final setting is not later than 8 hours;

6. Concrete prepared with expanded cement has expansion self-stress inside, which creates stronger gripping force with steel bars

7. This product is a powder, does not contain chlorine salts, and has no corrosion to steel bars. Non-toxic, non-flammable, no odor, safe to use.

2. Scope of application
1. Especially suitable for shrinkage-compensating concrete structure projects and anti-seepage concrete projects; shrinkage-compensating and anti-seepage plastering projects;
2. Widely used in large-diameter Concrete drainage pipes and seams, beams, columns and pipe joints, fixing machine bases and anchor bolts;
3. It is also commonly used for moisture-proof floors, pool leak-proofing, etc.

4. Post-pouring of cast-in-place concrete projects;

5. Configured as secondary grouting material for machine tool base and anchor bolt anchoring

3. Usage method
1. This cement is directly mixed with gravel and sand to form waterproof concrete or mixed with sand to form waterproof mortar. , but the mixing time is 45-60 seconds longer than that of ordinary concrete;
2. After pouring, waterproof concrete must be vibrated mechanically, and vibration leakage, under-vibration and over-vibration should be avoided, and honeycomb pits must not appear;
3. The plastering mortar requires moisture curing for at least 3 days. The concrete should be watered and cured when it is finally set to ensure that the concrete is in a sufficiently moist state. The curing period is generally not less than 14 days;
4. Expansive cement is not allowed. Use of slurry (such as polishing the floor, washing white sand and pasting exterior wall tiles, floor tiles, marble, etc.). .

IV. Precautions

1. A trial mix should be made before construction to determine the reasonable expansion amount of concrete (or mortar);

2. Expanding cement Generally do not mix with other types of cement.

V. Packaging and Storage
1. This product is packed in woven bags, with a net weight of 50±1kg per bag;
2. This product is stored in a ventilated and dry place, pay attention to moisture-proof;
3. The effective storage period of this product is half a year. If there is agglomeration after the expiration date, it must not be used.

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