Naphthalene Sulphonate (FDN) concrete admixture mainly consists of β Naphthalene sulfonate formaldehyde condensate. It is a high range water reducer, also named Naphthalene Sulfonate Formaldehyde Condensate (NSF), SNF, PNS, etc.
Naphthalene Sulphonate (FDN) concrete admixture meets the requirements of chemical admixture specifications for concrete: ASTM C 494, Type F; ASTM C 1017.
Application
1. Naphthalene Sulphonate (FDN) concrete admixture is suitable to make autotrophic concrete, steam curing concrete, steel concrete and prestress concrete, all of which are made mainly of portland cement. When concrete added this superplasticizer needs to be steam cured, it requires considerable structural strength. The curing requirements should be pre-tested.
2. Naphthalene Sulphonate (FDN) concrete admixture is applicable in areas with the daily lowest temperature of 0 degree and for making concrete which requires high fluidity, high strength or steam curing.
3. Naphthalene Sulphonate (FDN ) concrete admixture can be used to make C80 concrete with slump loss between 50mm and 70mm, or C60 concrete with that between 180mm and 220mm.
4. Naphthalene Sulphonate (FDN ) concrete admixture could be used as a raw material together with other components to make other kinds of admixtures, such as accelerator, retarder, anti-freezing agent and pumping aid to satisfy requirements from different construction projects, techniques, materials and environmental temperatures.
5. Naphthalene Sulphonate (FDN) concrete admixture will also fluidize concrete, making it ideal for tremie concreting or other applications where high slumps are desired.
6. Naphthalene Sulphonate (FDN) concrete admixture is compatible with Portland Cement, Portland Slag Cement, Fly-ash Cement, Portland Pozzolanic Cement, etc.
Uses and Dosages
1. It can be added directly or added in after being dissolved. It can be added during mixing and after-mixing.
2. The afterward approach can achieve better result. It's addition rate ranges from 0.4% to 1.0% of the weight of cementitious material in 1m3 of concrete, while the suggested rate is 0.5%.
3. If it is used in powder form, add it directly into cement, but not onto wet sand and gravels. If solution is used, please fully stir and dissolve it completely.
Basic equipments for manufacturing (liquid) (60 Tons per day)
1. Reactor of 5000 liter 1set Naphthalene Liquidification;
Reactor of 5000 liter 1set Sulfonation;
Reactor of 10000 liter 2sets Condensation;
Reactor of 20000 liter 1set Neutralization.
2. Raw material storage tanks, 3 sets, 30 tons capacity for each set
3. Pipeline: Phenolic resin pipeline and steel pipeline
4. Heating system: Streaming boiler 0.5 t, oil-fuel 300000kcal. /h
5. Environmental protection equipments: Corrosion-resistant draught fan, spray pump, Naphthalene recollection room, etc.
6. Additional equipment: Including power terminal, electrical cabinet, pipeline pump, air compressor, operation platform, etc...
7. Automatic production monitored by a computer system and data collection devices
Raw material for production
1. Crude Naphthalene (98%)
2. Sulphuric Acid (concentration 98%)
3. Formaldehyde (concentration 36%)
4. NaOH(40-60%)
Project Investment
Equipments: 163, 000USD to 200, 000USD
Plant, warehouse and office occupancy: 500-1000m2
Clear height of plant workshop: 6-8m
