YL-SNF-A is a high range water reducer and high concentration naphthalene-based superplasticizer, also named Naphthalene Sulfonate Formaldehyde Condensate (NSF), SNF, PNS and FDN etc.
YL-SNF-A (Na2SO4≤5%) contains no chloride and is non-corrosive to steel bars, non-poisonous, odorless, and non-flammable. Thus, it meets the requirements of chemical admixture specifications for concrete, complying with ASTM C 494, Type F. ASTM C 1017, GB8076-2008 and GB50119-2003 etc.
Items | Criteria | Actual results(C×0.75%) |
Appearance | -- | Brown powder |
Solid Content % | 92 min | 92.65 |
Moisture % | 8.0 max | 7.35 |
Fineness (0.315mm remains) % | 15.0 max | 9.2 |
PH value | 7 - 9 | 8.5 |
Sodium Sulfate Content % | 5.0 max | 3.8 |
Chloride Content % | 1.0 max | 0.11 |
Surface Tension | 68-72 Mn/m | 71 |
Cement Flowing Rate | 240mm | 265mm |
Water Reducing Rate | 20% min | 22.3% |
Steel-bar Corrosion | None | None |
0.5-1.2% by weight of cement. Exact dosage rates depend on the type of effect sought, quality of cement and aggregates, water/cement ratio and ambient temperature. Therefore, in many cases it is advisable to carry out trial mixes.
YL-SNF-A can be added directly or added in after dissolved in water. It can be
added during mixing and after-mixing (better). The after mixing approach
can achieve better result.
Items | Dosage rate (Cx%) | Water (g) | Slump (mm) | Water reducing rate (%) | |||
Reference concrete | 0 | 2555 | 82 | 0 | |||
YL-SNF-A | 0.75 | 1986 | 89 | 22.3 | |||
Compressive strength (MPa) /Compressive strength rate (%) | |||||||
1 day | 3 days | 7 days | 28 days | ||||
4.34/100 | 13.70/100 | 20.19/100 | 24.06/100 | ||||
7.63/173.3 | 23.85/173.4 | 30.84/150.7 | 33.72/137.2 |
For powder: Woven plastic bag with film liner. Net weight: 25kg +/- 0.2 kg.
It should be stored in a dedicated warehouse that is well-ventilated and dry and keep away from moisture.
Shelf Life: Minimum 12 months. After the expiration date, it can be used if testing results is qualified.