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weber ADH2R

weber ADH2R
weber ADH2R

Product benefits

• Allows the retention of the original slump over time in addition to the normal properties of a super plasticizer
• Increases the ultimate strength of the concrete
• High workability for longer periods.
• Reduced water content for a given workability
• Reduced permeability
• Improved durability





Product Description and Features

Product description

weber ADH2R is a water-reducing and retarding admixture for concrete. It enables easier placing, compaction and finishing of concrete and may be used to reduce the water content whilst retaining the same workability resulting in higher strengths. weber ADH2R may also be used to reduce the overall cement content for specified strength and durability. It can also improve the cohesion of concrete mixes based on materials having a higher water demand. weber ADH2R is preferred admixture for higher performance concrete (HPC) mixes containing micro silica or met kaolin.

Key Features

  • Allows retention of the origoinal slump over time in addition to the normal properties
  • Increases the ultimate strength of concrete
  • Reduces segregation and bleeding
  • Reduces thermal peaks
  • High workability for longer periods
  • Lower pumping pressure
  • Resistance to segregation at high workability
  • Reduced water content for a given workability
  • Higher ultimate strengths
  • Reduced Permeability
  • Improved durability
  • Reduced shrinkage and creep
  • Increased ease in finishing concrete


weber ADH2R is ideal to use in normal to high temperature conditions where slump retention over time is important for transportation.

  • Transport concrete
  • General reinforced concrete
  • Ready mix concrete
  • Pumped concrete
  • Water retention 15-20%

Technical Parameters

AppearanceBrownish free flowing liquid
Specific gravity1.22-1.27ºC
Chloride Content <0.2%


Colour cards example concrete admixtures

Preparation and Application

Direction For Use

weber ADH2R is total miscible in water. It is to be added to the concrete mixture during the mixing cycle at the same time as the water. No extension to normal mixing time is required.


Trails should be conducted to determine the optimum dosage of weber ADH2R for a particular mix. A dosage of 0.8- 1.6% of cementatious material is recommended. The dosage varies depending upon ambient temperature and mixture temperature conditions.

Effects of Overdosing

A severe over dose of weber ADH2R will result in the following:

·         Delay of the initial and final setting times

·         Increased workability

Providing it is properly cured, the ultimate strength of the concrete will not be adversely affected and will generally be higher than that of the normal concrete.




weber ADH2R can be used in all types of Portland and sulfate resisting cements, pozzolonic materials like fly ash GGBFS and silica fumes. weber ADH2R should be added directly into mixer and should not be premixed with other admixtures. If other concrete is containing weber ADH2R, then they must be mixed separately.

Specification Clause

weber ADH2R is a superplasticising concrete admixture manufactured to the following specifications:

weber ADH2R can be used in a dosage of 0.8-1.6% of cementatious material in accordance with the manufacturer’s instructions.


weber ADH2R is supplied in: Barrels (250kg)


weber ADH2R can be stored up to maximum 1 year from the date of manufacturing under cover, out of direct sunlight and protected from extreme temperatures.