Sodium Naphthalene Sulfonate Formaldehyde - (jk-02), Superplasticizer- (snf)

Jk-02np high range water reducing concrete admixture
superplasticizer astm c494, type f, astm c 1017
sodium naphthalene sulfonate formaldehyde (na2so4≤18%)
description
jk-02np 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.
jk-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.
uses
1. produces the high slump flowing concrete with no loss in strength.
2. produces low water/cement ratio concrete with high strengths.
3. 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.
4. 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
1. substantial improvement in workability without increased water or the risk of segregation. Normal set without retardation, even when overdosed. Improved density and surface finish.
2. high water reducing rate. 40% increase in 28 day strengths. High strengths after 8 hours.
3. compatible with portland cement, normal portland cement, portland slag cement, flyash cement, portland pozzolanic cement, etc.
4. 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 % 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 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.
jk-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 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
jk-02np 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 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.