RB-NP WATER REDUCING RETARDING SUPERPLASTICIZER

DESCRIPTION

RB-NP is a liquid admixture for concrete based on sulphonated naphthalene. The product may be used to effect substantial water reductions or to produce rheoplastic concrete with normal setting times.

APPLICATION FIELDS

  • Production of rheoplastic self-compacting concrete.
  • Precast concrete.
  • Low water/cement ratio concrete.
  • In complicated formwork or with congested reinforcement.
  • High compression and Impermeable concrete
  • Prestressed concrete
  • Very compact armature

FEATURES

  • Powerful plasticising action reduces or eliminates the need for compaction.
  • Concretes of similar workability can be produced with 20-30% less water.
  • Increased compressive, tensile and flexural strength can be achieved as a benefit of its water reducing properties.
  • High early strengths can significantly increase mould utilisation in precast works.

PACKAGING

 

RB-NP is available in 250 kg drums and 20 kg gallons.

 

TECHNICAL SPECIFICATIONS

Physical state: liquid

Density: Approximately 1.19 kg/l

Chloride content: according to standard

Color: brown

Minimum consumption temperature: 50C

 

STANDARDS

ASTM C494: Types F & G

ISIRI: 2930

DOSAGE

A dosage range of 0.6 kg to 1.2 kg per 100 kg cement is recommended as a starting point.

DIRECTION FOR USE

RB-NP should be added to the concrete mix during the mixing cycle at the same time as the water and the aggregates. The maximum effect is achieved when the RB-FM is added after the addition of 50 to 70 % of the water. Never add RB-NP to the dry cement. Keep mixing at high rate for 60 seconds in order to complete mixing. RB-NP can be used with all types of Portland cement, including sulphate resisting.

It should not be premixed with other admixtures. If other admixtures are to be used they must be dispensed separately.

STORAGE

RB-NP should be stored in original containers and at above 5 degrees Centigrade. If frozen gradually thaw and agitate until completely reconstituted.

SAFETY

RB-NP is not a fire or health hazard. Spillages should be washed down immediately with cold water. For further information refer to the material safety data sheet.

 

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