Sulphonated Naphthalene Formaldehyde powder for concrete admixtures,High Efficient water reducer.
SNF-A Superplasticizer
1.Product General
SNF-A Superplasticizer is a dry powdered admixture. It is produced through such a process: 1) sulphonating refined naphthalene with sulfuric acid, 2) condensing with formaldehyde, 3) neutralization, and 4) filtering. It conforms to GB8076-1997 and is mainly used for various high-strength concrete, steel concrete, prestressed concrete, large formwork concrete, slipforming concrete etc.
2.Standard Quality Targets:
item | target | item | target |
appearance | Brownish powder | PH Value | 7∼9 |
Solid content | ≥92 | Neat cement Grout flowability | ≥250 mm |
Na2SO4 | 5% | fineness | 0.315mm Mesh<15 |
Chloride | 0.3% | Surface Tension | 71±1×10-3N/ m |
3.Main technical performances and Targets(DosageC×0.7)
Tested items | Standard Data | SNF-A | ||
Class 1 | Class 2 | |||
Water reducing rate≥ | 12 | 10 | 20 | |
Bleeding ratio≤ | 90 | 95 | 15 | |
Air content | 3.0 | 4.0 | 2.0 | |
Setting time Difference(min) | Initial setting | 90∼120 | -55 | |
Final setting | -42 | |||
compressive strength ratio | 1d | 140 | 130 | 156 |
3d | 130 | 120 | 152 | |
7d | 125 | 115 | 146 | |
28d | 120 | 110 | 138 | |
Shrinkage ratio | 90d | 135 | 82 | |
Corrosion resistance | Yes or No | Yes | ||
4.Technical Performances and Applicable Ranges:
Dosage 0.5∼1.0( as weight of cement). Water reducing rate20∼30.
.SNF-A in liquid form.
item | Targets |
Solid Content | ≥32 |
Density | ≥1.18 |
Other targets | Same as in powder form |
Recommended Dosage | 1.5∼3.0 |
.Keep strength unchanged,Use of this product can save cement consumption by 15-20%.
.When dosage is 0.7%(solid), Slump can be increased by 10cm.
.The product is suitable for manufacturing high strength concrete, Accelerating strength concrete, flowing state concrete, pre-cast concrete and pre-stressed concrete, etc.
.Compressive strength, bending strength, impermeability and freeze-thaw resistance are remarkably increased.
5.Notices:
.Before the use, mix ratio test must be done, especially for first use of this product, to find out the correct mix rate and dosage.
.High grading cement and reasonable sand/stone grading must be used To make high-strength or super high-strength concrete
.Water dosage must be strictly controlled to keep mixture unchanged.
.The mix time should be prolonged for one minute and care should be taken to
strengthen wet curing.
.When the product in liquid form is used, Water content of the product should
be deducted from concrete mixture.
6. Packing ,transportation and storage:
.Packing:plastic pellicle inside and plastic woven bag outsaide with 40kg/bag±0.25kg. Liquid product is packed with big iron drum, 200kgs /drum(net weight).
.Waterproof and rainproof during transportation.
.It shall be stored in a waterproof, rainproof place to avoid agglomeration. If there is agglomeration, smashing or dissolving it will not affect using effect. The product is harmless and does not deteriorate in long terms.
7. Technical Consultance:
The company has lab equipments and professionals to serve the customers technically. If there is any technical problem on application, You are welcome to inquire and the company will try to do its best to help the customers solve problem.
