Description

YL-SNF-A is a high range water reducer, 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, 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.

 

 

Uses

1.        YL-SNF-A possesses the features of no retarding, no air-introducing, superplastic high water-reducing and strength enhancing. It has no chloride, low alkali content, low sulphonate, and high purity. It can be widely used in different concretes with less dosage and easy to use.

2.        YL-SNF-A can be applied to make flowing, strong or steam-curing concrete. The minimum working temperature can be as low as zero centigrade degree. In steam curing, concrete with superplasticizer has to be strong enough before heating. The steam curing specification has to be pre-tested. It is particularly used as base material for compound admixtures.

3.        It can prevent from the alkali-aggregate reaction because of the biggish alkali reactivity of aggregate or the alkali-aggregate reaction in the moist environment.

 

Advantage

1.        High water-reducing rate: YL-SNF-A can reduce water 20-30%. It has features of superplasticizer, effectively increases concrete fluidity and reduces water penetration and segregation and improves the encapsulation force of the concrete with reinforcing steel bar.

2.        Strengthening: Given the same amount of cement and slump requirement, this product with the dosage 0.5-1.2% can increase the concrete early strength and reinforced effect by 50-100%, 40-70%, 25-60% and 20-60% on day 1, 3, 7, and 28 respectively.

3.        High applicability: It can be used with different variety of cement. It is compatible with other admixtures.

4.        Low sodium Sulfate content: The aqueous solution has no crystals in winter, which can avoid pipeline congestions when JK-01 NP applied. It is suitable for automatic working.

5.        Effective durability: It can modify the structure of concrete and increase the property of anti-seepage, anti-freezing, and carbonization.

6.        Easy to use: It can be added directly or used after dissolved in water. It can be used for different working condition and concrete mixer.

 

Specifications

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

 

Dosage

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.

 

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	2555	82	0	4.34/100	13.70/100	20.19/100	24.06/100
YL-SNF-A	0.75	1986	89	22.3	7.63/173.3	23.85/173.4	30.84/150.7	33.72/137.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.