Product Data Sheet Show all documents

Sika® Retarder R 107

(former MasterSet® R 107)

Low dosage, retarding and plasticizing admixture for concrete

Sika® Retarder R 107 is a liquid admixture, which acts on cement particles in the mix, combining the effects of a powerful plasticiser and deflocculating agent with controlled retardation.

  • Considerably extends vibration limit of concrete mixes, thus reducing incidence of honeycombing and cold joints.
  • Reduces placing problems in hot weather concreting, by improving workability and workability retention.
  • Improves trowelability and surface finish.
  • Improves pumpability of concrete.
  • Considerably reduces permeability.
  • Enables economies in mix designs to be achieved.
Product Data Sheet Show all documents

Usage

  • Hot weather concreting, where controlled delay to initial set is of prime importance.
  • Ready-mix concrete, where workability retention coupled with retardation of initial set are beneficial.
  • To improve cohesion, workability and compaction in concretes using poorly graded/shaped fine aggregates.
  • Large slabs or bridge decks, etc., where extension of vibration limits is beneficial to avoid cold joints.
 

Advantages

  • Considerably extends vibration limit of concrete mixes, thus reducing incidence of honeycombing and cold joints.
  • Reduces placing problems in hot weather concreting, by improving workability and workability retention.
  • Improves trowelability and surface finish.
  • Improves pumpability of concrete.
  • Considerably reduces permeability.
  • Enables economies in mix designs to be achieved.

Packaging

Sika® Retarder R 107 is available in 20L and 1000 litre IBCs or in bulk.

Colour

Brownish liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

ASTM C494 Types A, B and D
BS 5075: Part 1
Product Information

Shelf Life

Up to 12 months if stored according to manufacturer’s instructions in unopened containers.

Storage Conditions

Store under cover, out of direct sunlight and protect from extremes of temperature.
Failure to comply with the recommended storage conditions may result in premature deterioration of the product or packaging. For specific storage advice, consult the Sika Technical Services Department.

 

Density

1.160 – 1.180

Flash Point

Nil

pH-Value

6.0 – 8.0

Total Chloride Ion Content

Nil to BS 5075:1982
System information

Compatibility

Sika® Retarder R 107 can be used with all types of Portland cement, including SRC. For use with other special cements, contact the Sika Technical Services Department.
Sika® Retarder R 107 should not be pre-mixed with other admixtures. If other admixtures are to be used in concrete containing Sika® Retarder R 107, they must be dispensed separately.
Consult the Sika Technical services department for advice.
Technical Information

Effect on Setting

Sika® Retarder R 107 acts efficiently to give controlled retardation of initial set. Setting times of concrete mixes are related to cement type and ambient temperatures.

Application

Application Information

Dispensing

Sika® Retarder R 107 is introduced into the mixer with the mixing water. The admixture works more efficiently if it is added to the dampened mix after 50-70% of the water has been introduced.
No extension to normal mixing time is necessary. Sika® Retarder R 107 should never be added to dry cement.

 
Consumption

Recommended Dosage

In all cases, we recommend that trial mixes are carried out to determine the correct levels of admixture required to achieve the desired concrete properties. Sika® Retarder R 107is normally dispensed, depending on the desired plasticising or water-reducing effect, at a rate of 0.2-1.0 liter/100kg.
Other dosages may be used, depending on the materials and conditions.

 

EFFECTS OF OVER DOSAGE
A severe over dosage of Sika® Retarder R 107 will result in the following:

  • Retardation of initial and final set.
  • Slight increase in air-entrainment.
  • Increase in workability.

Provided it is properly cured, the ultimate strength of the concrete will not be adversely affected and will generally be higher than for normal concrete. The retarding effects of very high dosages will be exaggerated with SRC.

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