Product Data Sheet Show all documents

Sikament® N-7

HIGH RANGE WATER-REDUCING CONCRETE ADMIXTURE

Sikament® N-7 is a dual action liquid superplasticiser for the production of free flowing concrete or as a substantial water-reducing agent for promoting high early and ultimate strengths.
Sikament® N-7 is chloride free and is compatible with all types of Portland Cement.

As a superplasticiser:
  • Workability is improved over a longer period of time
  • Increased placeability in slender components with congested reinforcements
  • Decreases the amount of vibration required for compaction
  • Normal set without retardation
  • Significantly reduces the risk of segregation
  As a water-reducer and strength enhancer:
  • Water reduction up to 25% (depending on dosage)
  • High early strength
  • High ultimate strength
Product Data Sheet Show all documents

Usage

Sikament® N-7 is used as a superplasticiser in the production of free flowing concrete for:
  • Slabs and foundations
  • Walls, columns and piers
  • Slender components with densely packed reinforcements
  • Textured surface finishes
  Sikament® N-7 is also used as a water-reducing agent leading to high early and ultimate strength concrete for:
  • Precast concrete elements
  • Prestressed concrete
  • Bridges and cantilever structures
  • Areas of concrete where formwork must be removed quickly or early loading will be applied
 

Advantages

As a superplasticiser:
  • Workability is improved over a longer period of time
  • Increased placeability in slender components with congested reinforcements
  • Decreases the amount of vibration required for compaction
  • Normal set without retardation
  • Significantly reduces the risk of segregation
  As a water-reducer and strength enhancer:
  • Water reduction up to 25% (depending on dosage)
  • High early strength
  • High ultimate strength

Packaging

200 Litre Drum and 1000 Litre IBC's

Colour

Dark brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Sikament® NN conforms to the requirements of ASTM C 494 Type F and BS 8110: Part 1.
Product Information

Chemical Base

Naphthalene Formaldehyde Sulphonate

Shelf Life

24 months from the date of production if stored in undamaged and unopened, original sealed packaging, in dry conditions at temperatures between +5°C and +30°C.

Storage Conditions

Protect from direct sunlight and frost

Application

Application Information

Dispensing

Sikament® N-7 shall be dispensed neat into the premixed concrete after all the other concrete components, including total water, have been discharged into the pan-mixer or truck mixer.
Do not dilute Sikament® N-7.


Typical Performance:

Variation in dispensing method of Sikament® N-7 and effect on slump           properties.
 

Mix

Dosage

Slump (mm)

1Without Sikament® N-750
21% Sikament® N-7 with gauging water120
31% Sikament® N-7 (neat without gauging water) added immediately after making original concrete and further mixing for 1 minute150
41% Sikament® N-7 (neat without gauging water) added ½ hour after making up concrete and further mixing for 1 minute160
  • Concrete consistency

          - Measured in terms of slump to BS 1881: Part 102

          - With Sikament® N-7 added at different times

  • Cement:              OPC (Type 1)
  • Granulometry:   0 – 31 mm
  • W/C:                    0.54 for all mixes

Comparative strength of plain concrete against Sikament® N-7 high strength concrete and Sikament® N-7 flowing concrete with constant

cement content.
 

Mix DesignPlain Concrete

Sikament® N-7 High Strength

Concrete

Sikament® N-7 High Flow

Concrete

Cement, Type 1 (kg)450450450
W / C Ratio0.450.340.45
Sikament® N-7 (litres)-4.54.5
Slump (mm)5060180
Temperature (°C)303030
Compressive strength (MPa)
- 1 day162920
- 3 days254334
- 7 days334944
- 28 days486555


Note: These are typical test results. Site results may differ according to mix design and site conditions.


 
Consumption

Recommended Dosage

Sikament® N-7 can be used at the rate of 600 – 2000 ml per 100 kg of       cement depending on requirements concerning workability and strength.     It is recommended that trial mixes be conducted to determine the exact dosage rate required.

Note:
For more specific requirements, advice is available from our Technical      Service Department to determine the usage rate for optimum results.

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