Description
YL-SNF-B is a naphthalene-based highly effective water reducing agent for promoting accelerated early and ultimate strength development, commonly referred to as a superplasticizer, also named Naphthalene Sulfonate Formaldehyde Condensate (NSF), SNF, PNS and FDN etc.
YL-SNF-B contains no chloride, non-corrosive to steel bars, non-poisonous, odorless, and non-flammable. It complies with ASTM Designation C494, Type F, ASTM C 1017, GB8076-2008 and GB50119-2003 etc.
Uses
- Produces the high slump flowing concrete with no loss in strength.
- Produces low water/cement ratio concrete with high strengths.
- Ideal for using in high strength concrete, flowing concrete, early strength concrete, precast steam curing concrete, prestressed concrete etc. where it is desired to keep the water/cement ratio to a minimum and still achieve the degree of workability necessary to provide easy placement and consolidation.
- Be used as basic material to produce others compound admixtures, (such as accelerating and water-reducing admixture, retarding and water-reducing admixture, pumping antifreeze and pumping water-reducing admixture, etc.)
Advantages
- Substantial improvement in workability without increased water or the risk of segregation. Normal set without retardation, even when overdosed. Improved density and surface finish.
- High water reducing rate. 40% increase in 28 day strengths. High strengths after 8 hours.
- Compatible with Portland cement, Normal Portland cement, Portland Slag Cement, Flyash Cement, Portland Pozzolanic Cement, etc.
- Improve workability (slump) of concrete when added into mixing truck.
Specifications
Items Criteria Actual results(C×0.75%)
Appearance Light brown powder
Solid Content % 92 min 92.55
Moisture % 8.0 max 7.45
Fineness (0.315mm remains) % 15.0 max 9
PH value 7 - 9 7.8
Sodium Sulfate Content % 9.0 max 8
Chloride Content % 1.0 max 0.21
Surface Tension 68-72 Mn/m 70
Cement Flowing Rate 230mm 240mm
Water Reducing Rate 18% min 20%
Steel-bar Corrosion None None
Dosage
0.5 – 1.5% by weight of cement. Exact dosage rates are dependent 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-B 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.
Test Data Sheet
Items Dosage rate (Cx%) Water (g) Slump (mm) Water reducing rate (%) Compressive strength (MPa) /Compressive strength rate (%)
1 day 3 days 7 days 28 days
Reference concrete 0 2615 80 0 3.16/100 12.89/100 18.62/100 22.72/100
YL-SNF-B 0.75 2090 75 20.1 6.87/217.1 22.54/174.7 29.12/156.3 35.92/158.1
Package, Storage & Shelf Life
For powder: Woven plastic bag with film liner. Net weight: 25kg +/- 0.2 kg.
It should be stored in a dedicated warehouse that is we
