PRODUCT CENTER
HPC-JR polycarboxylic acid series high performance water reducing agent (slow setting type) is composed of polycarboxylic acid water reducing agent mother liquor and slow setting component, slump retention component and other functional components, with high efficiency water reducing, delay slump loss, delay hydration temperature rise of concrete, can improve the workability of concrete, suitable for concrete long-distance transportation, field pumping and construction under hot climate conditions. Effectively inhibit the early hydration of concrete, and does not affect the later strength, is the ideal admixture for the preparation of high strength and high performance concrete, large volume concrete, long distance transportation of commercial concrete, the performance indicators of the product are better than the national standards of the relevant indicators specified values.
This product has a high water reduction rate, slump loss is small, slow coagulation effect is obvious, setting time can be customized according to user requirements, can also be adjusted by adjusting the dosage.
The addition of this product can delay the hydration of cement, reduce the hydration heat release, reduce the temperature stress of concrete, avoid the occurrence of temperature cracks, can greatly improve the workability of concrete, improve and enhance the mechanical properties of concrete.
The slump loss is small, which is conducive to the preparation of long-distance transportation of pumped concrete and concrete construction under hot climate conditions, and does not affect the pumping or dispersing effect of concrete for a long time.
In field application, the dosage should be strictly controlled, and overmixing will affect the early strength growth of concrete, and even the phenomenon of long-term non-solidification. This product has no chlorine and low alkali, and has good adaptability to various cements.
| Item | Ex-factory technical index |
| Appearance | Liquid |
| Solid content (%) | Control value ±1 |
| Density (g/ml, 20℃) | Control value ±0.02 |
| pH value | 6±1 |
| Alkali content (by cement content, %) | ≤3 |
| Chloride ion content (by cement content, %) | ≤0.3 |
| Sodium sulfate content (by cement content, %) | ≤3 |
| Formaldehyde content (by cement content, %) | ≤0.03 |
| Cement slurry fluidity (mm) | ≥240 |
Note: According to standard GB8077 "Test method for uniformity of Concrete admixtures"
CONCRETE PHYSICS
| Pilot project | Standard requirement | Ex-factory technical index | |
| Water reduction rate (%) | ≥25 | ≥27 | |
| Pressure bleeding ratio (%) | ≤90 | ≤80 | |
| Gas content (%) | ≤6.0 | ≤3.0 | |
| Setting time difference (min) | Initial set | ＞+90 | ＞+90 |
| Final set | - | - | |
| 1h slump time change | ≤60 | ≤50 | |
| Compressive strength ratio (%) | 7d | ≥140 | ≥150 |
| 28d | ≥130 | ≥140 | |
| Shrinkage ratio (%) | 28d | ≥110 | ≥105 |
| Corrosion of steel bars | - | There is no | |
Note: According to the standard GB 8076 "Concrete admixture", JG/T223 "Polycarboxylic acid series high performance water reducing agent"
It is suitable for large volume concrete, high strength and high performance concrete, roller compacting concrete, concrete constructed under hot weather conditions, concrete poured in large areas, concrete avoiding cold joints, concrete requiring a long time of parking or long-distance transportation, concrete self-leveling and non-vibration concrete, concrete constructed by sliding form or pull form construction and other concrete requiring delayed setting time.
It is suitable for the construction of different grades of concrete with daily minimum temperature above 5℃, as well as the continuous pouring engineering of various high-flow concrete, commercial concrete, pumped concrete, prestressed and reinforced concrete.
It should not be used alone for concrete with early strength requirements and steamed concrete.
This product is a composite product, used alone, solid content according to the concrete raw materials and construction technical requirements, according to the relevant standards of construction.
The recommended dosage of this product is 1.0%-2.5%, and the actual dosage needs to be determined by test.
Due to the differences in adaptability between different types of cement and admixtures, the adaptability test of cement and admixtures should be done before application or after changing cement varieties, models and cement batches.
When used, it can be added to the mixing water, or added to the concrete mixer at the same time with the mixing water. In order to achieve good water reduction effect, it is recommended that the mixing time is at least 120s, and the concrete mixing test should be carried out before use to ensure the quality of concrete.
This product is packed in 200kg round drum or 1000kg square drum, and the packaging specifications can also be determined according to user requirements.
After dilution, the product will affect the effective content of the product, and it is easy to become mildew and odor after high temperature or exposure to the sun. Therefore, during storage and transportation, attention should be paid to preventing rain, moisture, avoiding direct sunlight, and sealing at room temperature.
In the case of good storage conditions, the shelf life of 6 months; When it has been used for more than 6 months or has become moldy and smelly, relevant tests should be carried out to determine whether it can continue to be used; Please use it within one week after opening.
This product is not flammable, but the storage and transportation should be away from the open flame, strictly prohibited storage in iron drums.
This product may have a small amount of crystallization when the ambient temperature is low due to different concentrations, and may freeze when it is below 0℃, so it is suitable for indoor storage, and can continue to use after crystallization or freezing melting.
This product is non-toxic, non-corrosive, non-flammable, avoid ingestion and contact with eyes when using. In case of contact with eyes or inlet, rinse immediately with water. Compatibility test should be carried out when mixing with other admixtures.
