High-strength and high-performance retardant pumping agent
1. Scope of application
Suitable for ready-mixed high-strength pumping concrete, commercial concrete, mass concrete, reinforced concrete, and self-compacting concrete.
2. Main performance
1. This product is divided into powder and liquid. The powder is brown; the liquid is brown-black. When constructing at negative temperatures in winter, anti-freeze type can be used.
2. This product has stable chemical properties, good safety performance, non-toxic, odorless and non-flammable. No crystallization in winter.
3. The water reduction and enhancement effect is good. The water reduction rate is above 18%, and pumpable concrete below 70% can be prepared.
4. Good durability and small shrinkage of concrete.
5. Good constructability. This product has an obvious retarding effect, which greatly reduces the early hydration heat of concrete. The total initial rising time lasts to about 10 hours. It can also be adjusted appropriately according to customer needs. It has no bleeding, no separation, and good water retention performance. The 2h loss is small and has a certain air content, which improves the flexural performance of concrete, greatly improves the concrete's elastic modulus and waterproof and seepage functions.
6. This product has strong adaptability to various types of cement, and the effect is particularly good when mixed with ultra-fine mineral admixtures.
3. Performance of ZWL-A-II high-strength and high-performance retarder pumping agent (reference value)
Inspection items | Corporate Standard | Inspection results | Inspection items | Enterprise Standard | Inspection results | ||
Air content (%) | ≤4.5 | 2.3 | Bleeding rate ratio (%) | ≤90 | 80 | ||
Slump increase (mm) | ≥100 | 118 | Rebar corrosion | None | None | ||
Slump protection Leave value (cm) | 30min | ≥150 | 189 | Compressive strength ratio | 3d | ≥90 | 118 |
60min | ≥120 | 177 | 7d | ≥90 | 120 | ||
| Setting time Difference min | Initial setting | — | +230 | 28d | ≥90 | 116 | |
Final setting | — | +224 | Shrinkage Ratio (%) | ≤135 | 115 | ||
Note: The testing dosage of powder is 0.75% (based on cement usage); the testing dosage of liquid is 1.8% (based on cement usage) ) | |||||||
IV. Recommended dosage
Intensity level (pumping) | Material usage (%) | Admixture (liquid) content % | ||||||
C（32.5） | C（42.5） | F | 1014 | 1.2-1.4 | ||||
C40 | 336 | 84 | 180 | 712 | 1068 | 1.5-1.7 | ||
C50 | 389 | 97 | 180 | 695 | 1039 | 1.8-2.0 | ||
C60 | 424 | 106 | 170 | 710 | 1000 | 2.1-2.3 | ||
C70 | 370 | 85 | 114 | 165 | 675 | 1011 | 2.4-2.6 | |
5. How to use
1. Dry powder can be directly mixed into concrete for use or formulated. A solution of a certain concentration is used, and the liquid enters directly.
2. When used with expansion agent, the concrete mixing time should be extended by 30 seconds.
6. Packaging, transportation and storage
1. The powder is packed in a plastic bag lined with an inner woven bag. The net weight of each bag is 25Kg±0.13Kg or 50Kg±0.25Kg; liquids are packed in plastic barrels, which must be sealed to prevent leakage or evaporation of water. Tank trucks can also be used for transportation.
2. When transporting the powder, be careful not to encounter sharp objects to prevent the package from being damaged and getting damp. If it gets damp, it can be prepared into a solution of a certain concentration for use without affecting the use effect.
3. It should be stored in a ventilated and dry special warehouse. The validity period is one year. It can still be used after passing the validity period and passing the test.
C60
424
106
170
710
1000
2.1-2.3
C70
370
85
114
165
675
1011
2.4-2.6
五 , Usage method
1. The dry powder can be directly mixed into concrete for use or used as a solution of a certain concentration, and the liquid can be added directly.
2. When used with expansion agent, the concrete mixing time should be extended by 30 seconds.
6. Packaging, transportation and storage
1. The powder is packed in a plastic bag lined with an inner woven bag. The net weight of each bag is 25Kg±0.13Kg or 50Kg±0.25Kg; liquids are packed in plastic barrels, which must be sealed to prevent leakage or evaporation of water. Tank trucks can also be used for transportation.
2. When transporting the powder, be careful not to encounter sharp objects to prevent the package from being damaged and getting damp. If it gets damp, it can be prepared into a solution of a certain concentration for use without affecting the use effect.
3. It should be stored in a ventilated and dry special warehouse. The validity period is one year. It can still be used after passing the validity period and passing the test.
3. It should be stored in a ventilated and dry special warehouse. The validity period is one year. It can still be used after passing the validity period and passing the test.
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