Cement Concrete Water-Reducing Admixture
See larger image: Cement Concrete Water-Reducing Admixture| component: | Naphthalenesulfonate poweder or solution |
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| Brand Name: | BOSTD |
| Place of Origin: | China (Mainland) |
| Model Number: | FDN |
| Payment Terms: | L/C,T/T |
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| Minimum Order Quantity: | 1,000 Kilogram |
| Supply Ability: | 3,000 Metric Ton per Month |
| Package: | Bag, pallet, etc. |
| Delivery Time: | within 10 days for common products after receipt of L/C or T/T |
Product Details
BOSTD Water-reducing admixtures are added to concrete to achieve certain workability (slump) at a lower water/cement(W/C) ratio.FDN Water-reducing admixtures are used to improve the quality of concrete and to obtain specified strength at lower cement content. They also improve the properties of concrete containing marginal- or low-quality aggregates and help in placing concrete under difficult conditions. Water reducers have been used primarily in bridge decks, low-slump concrete overlays, and patching concrete.
Specification
Item | FDN-I | FDN-II |
Appearance | Dark brown powder | Dark brown powder |
Cement grout fluidity(mm) ≥ | 220 | 235 |
pH (1% water solution) | 7-9 | 7-9 |
Diameter (60-mesh residue) % ≤ | 15 | 15 |
Water content (%) ≤ | 10 | 10 |
Sodium sulfate content (%) ≤ | 17 | 5 |
Item | GB8076-97 Grade 1 | FDN-I | FDN-II | |
Water-reducing rate (%) | ≥12 | 20 | 27 | |
Ratio of bleeding rate (%) | ≤90 | 70 | 60 | |
Air content (%) | ≤3.0 | 2 | 2.5 | |
| 1d | ≥140 | 146 | 150 |
3d | ≥130 | 152 | 176 | |
7d | ≥125 | 160 | 165 | |
28d | ≥120 | 158 | 160 | |
Note: Also complies with BS5075:Pt3: 1985
Addition Rates
0.5-1.5% by weight of total cementitious centent. Exact dosage rates are dependent on the type of effect sought, quality of cement and aggregates, W/C ratio and ambient temperature. It is advisable to carry out trial mixes.
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