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Sulphonated Naphthalene Formaldehyde Liquid Back
SPL is a sodium salt of polynaphthalene sulphonic acid. It is used as a highly effective water soluble superplasticiser for concrete. It possesses a powerful water reducing and dispersing ability whereby high strength, flowing & self leveling concrete can be produced. Sprea plasticiser is practically chloride free so it doesn't pose any corrosion hazards to steel reinforcement.

Incorporation of SPL is used to achieve the following: • Improves flow properties of concrete by dispersing cement particles and preventing floc formation for extended workability. • Improves higher early & ultimate compressive flexural strength by lowering water cement ratio. Up to 30% water reduction can be achieved by using optimum dosage of SPL. • Assures higher resistance of concrete by improving the rheological properties such as compressive flexural strength and modulus elasticity. • Strong plasticising effect without any tendency to segregation. • Environment friendly and non hazardous product for application. • Cost efficient as it supports increased use of cementitious supplementary material such as silica, fly ash and slag. • Excellent product formulators, versatile for formulations, compatible with most of the additives used in admixture formulations which helps in producing versatile applications. • Improves workability by maintaining same water cement ratio.

 

Parameter

Value

Unit

(1)

Low

(2)

Medium

(3)

High

Sodium sulphate content

(by mass)

2.5 max

5.0 max

9.0 max

%

Appearance and form

Clear brown liquid

 

Ionic nature

anionic

 

Freezing point

-2

0C

Boiling point

105

0C

Specific gravity at 250C

1.190 – 1.240

gm/cm3

Dilution in water

Dilutes rapidly in hard or soft water

 

Solubility

Soluble in water, methanol & acetone

 

Solid content ( by mass )

                       41+ 1

%

pH at 250C

7 - 9

 

Chlorides

250 max

ppm

Heavy metals

Not traceable

 

Insolubles

0.5 max

%

Free formaldehyde

0.05 max

%

 

• Ready mix concrete. • Pre-cast and pre-stressed concrete. • Marine concrete. • Gunite concrete.(shotcrete) • Flowable and pumpable concrete. • High performance concrete. • High fluidity concrete. • High strength concrete for dams bridges and high buildings. • Self compacting concrete. • High durable concrete.

Field trials should be conducted to determine optimum dose of SPL. Generally 0.2 – 2% of SPL is used based on weight of cement.

SPL should be added to concrete at the end of mixing cycle. Do not add SPL to dry cement.

SPL is supplied mainly in stainless steel tank containers. SPL is an alkaline solution which may cause irritation to eyes & skin on direct and prolonged contact. Hands should be thoroughly washed with soap and water before meals and the end of the working day. Use safety goggles and hand gloves while handling the product. SPL must be stored at 25 0C in closed original packing protected from direct sunlight ,to give shelf life not less than 6 months .