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Naphthalene-based concrete admixtures (Na2SO4 less 18%)
Description
NX-02NP is a naphthalene-based highly effective water reducing admixtures 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.
NX-02NP 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.
UsesProduces 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. Improving 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, fly ash Cement, Pozzolanic Cement, etc.Improving 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 % | 18.0 max | 16.60 |
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 depends 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 mix.
NX--02NP 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 results.
Naphthalene-based concrete admixture