Description
Applications
VF-1 is used in concrete in industrial and civil buildings, hydraulic engineering, transport system, port engineering, and municipal engineering.
VF-1 is used in ready mix plants, precast and concrete plants.
VF-1 is suit for ordinary concrete, high strength concrete, self-compaction concrete and as-cast-finish concrete.
Properties
Excellent water-reducing ability. VF-1 can significantly reduce 40% mixing water in high strength concrete.
Enhance physical and mechanical properties of concrete.
Enhance durability of concrete.
Enhance volumetric stability of concrete.
Excellent compatibility with Portland cement.
High water retention capacity.
Usage
For powder VF-1, the dosage is typically 0.5%~1.5%, 2.0% for high strength concrete.
The amount of VF-1 used in concrete will be slightly adjusted depending upon job requirements, such as concrete strength, variations in cement, aggregate and other job site conditions. Experiments for appropriate dosage must be carried out when changing concrete mix proportion or materials.
VF-1 can be added in concrete with other raw materials directly.
VF-1 cannot be used with naphthalene based water reducing admixture.
Experiment must be done when VF-1 is used together with other admixtures.
Uniformity
| Item | Index | Item | Index |
|---|---|---|---|
| Appearance | Yellow brown transparent liquid | Classification | High performance water-reducing admixture |
| Chloride Ion | ≤ 0.6% | pH Value | 6 – 8 |
| Cement Paste Fluidity | ≥ 220 mm | Density (g/ml) | 1.10 ± 0.02 g/ml |
Concrete Performance with 0.8% VF-1 by Binder Weight
| Test Item | Hardening Accelerating | Standard | Set Retarding | Results |
|---|---|---|---|---|
| Water reducing rate (%) ≥ | 25 | 25 | 25 | 26.0 |
| Ratio of bleeding rate (%) ≤ | 50 | 60 | 70 | 10 |
| Air content (%) ≤ | 6.0 | 6.0 | 6.0 | 2.5 |
| Difference in setting time (min) – Initial | -90 ~ +90 | -90 ~ +120 | ＞+90 | +60 |
| Difference in setting time (min) – Final | — | — | — | +46 |
| 1h change – Slump (cm) | — | ＜80 | ＜60 | 30 |
| Compressive strength ratio (%) ≥ 1d | 180 | 170 | — | 240 |
| Compressive strength ratio (%) ≥ 3d | 170 | 160 | — | 210 |
| Compressive strength ratio (%) ≥ 7d | 145 | 150 | 140 | 178 |
| Compressive strength ratio (%) ≥ 28d | 130 | 140 | 130 | 152 |
| Ratio of shrinkage (%) ≤ 28d | — | 110 | — | 102 |
Conclusion: the project is in line with “high performance water reducer” index of GB8076-2008.
Packaging, Transport and Storage
Liquid VF-1 is available in 100kg sealed plastic tank. Other special package can also be available according to prior consultation.
Special measures should be taken to ensure entire package.
Dry and well ventilated warehouse is needed for storage. Quality guarantee of VF-1 is one year under normal conditions. If storage has surpassed the time, test must be done to confirm the validity.
Keyword standard concrete concrete.
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