Product Data Sheet Safety Data Sheet Show all documents
Sikacrete®-950 DP

Sikacrete®-950 DP

SILICA-FUME DENSIFIED, DRY POWDER ADMIXTURE FOR CEMENT CONCRETE AND MORTARS

Sikacrete®-950 DP is a densified dry powder microsilica admixture for Portland cement-based concrete and mortars. Sikacrete®-950 DP is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form. Silica fume particles have a diameter of less than 1μm; about 100 times smaller than the average cement particle, that chemically reacts with the free lime Ca (OH) in the cement paste and results in the formation of calcium silicate hydrate (CSH) gel, the binder that holds together the constituents and fills voids in concrete.

  • Produces concrete with considerably increased compressive and flexural strengths
  • Allows greater design flexibility and structural design economies
  • Reduced permeability to increase the service life of the concrete
  • Excellent abrasion and erosion resistance increases concrete durability in hightraffic areas
  • Resistance to sulphate and chloride water-borne chloride and de-icing salt generated corrosion
  • Excellent freeze/thaw resistance due to filling of voids and capillaries
  • Does not contain calcium chloride nor any other intentionally added chloride containing ingredients
Product Data Sheet Safety Data Sheet Show all documents

Usage

  • All high performance, high strength applications
  • Concrete required to resist water and chemical ingress
  • All concrete which is required to resist mechanical abrasion
 

Advantages

  • Produces concrete with considerably increased compressive and flexural strengths
  • Allows greater design flexibility and structural design economies
  • Reduced permeability to increase the service life of the concrete
  • Excellent abrasion and erosion resistance increases concrete durability in hightraffic areas
  • Resistance to sulphate and chloride water-borne chloride and de-icing salt generated corrosion
  • Excellent freeze/thaw resistance due to filling of voids and capillaries
  • Does not contain calcium chloride nor any other intentionally added chloride containing ingredients

Packaging

11.4 kg (25 lb) bag

1000 kg (2200 lb) FIBC* 

Bulk delivery

*Flexible Intermediate Bulk Container

Colour

Powder / Grey

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Meets the requirements of ASTM C1240
Product Information

Shelf Life

Unlimited in original and unopened packaging.

Storage Conditions

Store in dry conditions at temperatures above +2 °C (35 °F)

Specific Gravity

Approx. 2.19 - 2.29 kg/L

 

Application

Application Information

Compatibility

Sikacrete®-950 DP is compatible with all known portland cements manufactured under ASTM specifications.

Mixing

Mixing / Dispensing:

Sikacrete®-950 DP may be stored in bulk storage in a cement silo and be batched in the same manner as bulk cement. When using Sikacrete®-950 DP in 11.4 kg (25 lb) packaging, note that the bags are repulpable/shreddable and intended to be added directly to central or truck mixer without opening. The bags are designed to disintegrate through a combination of wetting and grinding the paper during concrete mixing. Specific batching and mixing instruction procedures for central and truck mixing as outlined in the Silica Fume Association Users Manual and ASTM C94/C94M must be followed.

    Workability and Finishing:

    Microsilica may affect the finishing characteristics of the concrete, particularly where warmer ambient conditions are encountered. The amount of bleed water from the concrete also may be reduced and Sika recommends the use of a finishing aid and evaporation retarder such as SikaFilm® to aid finishing

    Restrictions

    • Do not introduce repulpable bags into concrete mixes with low water cementitious ratios and smaller size aggregates as these mixes may not develop sufficient mixing energy to fully disolve the bags. Always determine repulpability of bags by pretesting mix designs and batch sequence. Contact your local Sika representative for more information and assistance.
    • The low water cement ratios typically specified for concrete containing microsilica make the use of a high range water reducer, such as a ViscoCrete® or Sikament® product essential in most applications. Sika recommends the use of Sika® air entraining admixtures where air entrained concrete is required.
    Consumption

    Recommended Dosage

    Dosage rates are typically between 5 % and 15 % by weight of cement. It is strongly recommended that trial batches be produced using project-specific materials in order to determine the optimum dosage to achieve specified requirements.

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