We specialize in manufacturing FDN-A,B,C of sulphonated naphthalene formaldehyde.Our production capacity is 300,000 tons/year.
SULPHONATED NAPHTHALENE FORMALDEHYDE
1.Product General
FDN-A ,FDN-B,AND FDN-C 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:
FDN-A
item | target | item | target |
appearance | Brownish powder | PH Value | 7--9 |
Solid content | ≥92% | Neat cement Grout flowability | ≥250 mm |
Na2SO4 | 5% MAX. | fineness | 0.315mm Mesh<15 |
Chloride | 0.3%MAX | Surface Tension | (71±1)×10-3N/ m |
FDN-B
item | target | item | target |
appearance | Brownish powder | PH Value | 7--9 |
Solid content | ≥92% | Neat cement Grout flowability | ≥240 mm |
Na2So4 | 10%MAX. | fineness | 0.315mm Mesh<15 |
Chloride | 0.4%MAX | Surface Tension | (71±1)×10-3N/ m |
FDN-C
item | target | item | target |
appearance | Brownish powder | PH Value | 7--9 |
Solid content | ≥92% | Neat cement Grout flowability | ≥230 mm |
Na2So4 | 20%MAX | fineness | 0.315mm Mesh<15 |
Chloride | 0.5%MAX. | Surface Tension | (71±1)×10-3N/ m |
