Set-Retarders

Use

Plastiment is recommended for use whenever high quality concrete with predictable and controlled set times is desired. Use in flatwork and horizontal or vertical slipform placements where a superior surface finish is required.

Characteristics and Advantages

Plastiment is highly effective in hot weather concreting to offset the accelerating effects of high ambient temperatures by slowing the hydration reaction and controlling the hydration heat. Concrete workability is enhanced and a superior surface finish is obtained.
In mass concrete pours Plastiment controls temperature rise and reduces the risk of thermal cracking.

• Initial set times are delayed, allowing time for proper placement and finishing without cold joints in hot weather conditions.
• Plastiment increases concrete density and delivers increased early and ultimate, compressive and flexural strengths.
• For flatwork applications Plastiment acts as a finishing aid, workability is improved, bleeding is controlled and a superior surface finish is obtained.
• Lower water cement ratios provide decreased permeability and increased durability.
• Plastiment can be used to retard concrete during the hot weather concreting. Refer to ACI 305R Hot Weather Concreting for more information.
• Plastiment does not contain calcium chloride or any other intentionally added chlorides.

Colour

Flourescent Green Brown liquid.

Packaging

205 litre (54 US gal)/drum and bulk delivery.

Use

Sika® Plastiment® RX is a new generation, synthetically manufactured, set-retarding, final strength increasing admixture for concrete. Sika® Plastiment® RX provides for a more plastic and flowable concrete, greater uniformity, increased durability, reduced shrinkage and permeability in your concrete. Sika® Plastiment® RX facilitates placing and finishing by providing controlled retardation of the concrete’s setting time, preventing premature stiffening.

Characteristics and Advantages

■ Controlled retardation (determined by dosage).
■ Increased workability and easier placeability.
■ Easier and faster pumping of concrete.
■ Improved finishing characteristics for flatwork.
■ Reduced shrinkage and cracking.
■ Reduced segregation at a given slump.
■ Greater impermeability.
■ Increased concrete durability and uniformity.
■ Improved appearance of architectural concrete.
■ Increased strength at final ages.

Colour

Light brown liquid

Packaging

205 L (54 US gal.) drum
1040 L (275 US gal.) IBC
Bulk delivery

Use

Typical applications:
■ Transport freshly batched ready mix concrete for long distances.
■ For better control of concrete set time in hot and cold weather concreting applications.
■ Large concrete pours; to help prevent cold joints.
■ Pumping long distances.
■ Low water cement ratio concrete, such as high strength or pervious concrete.
■ High early strength concrete for improvement of workable life without a detrimental effect on early strengths.
■ Stabilize shotcrete mixes.
■ Whenever controlled set time or cement hydration is required.

Characteristics and Advantages

■ Increases workable life of concrete up to several hours.
■ Allows controlled delay in set time.
■ Provides flexibility in planning and scheduling concrete pours.
■ The effect of SikaTard-440 in concrete can be negated by addition of appropriate accelerators, at any time.

Colour

Green liquid

Packaging

205 L (54 US gal.) drum
1040 L (275 US gal.) IBC container
Bulk delivery

Use

SikaTard 930 meets ASTM C 494 requirements as a Type B, retarding admixture.

Characteristics and Advantages

• Enables increase in the workable life of concrete up to several hours.
• Offsets the effect of slump loss and enables to control the set time of concrete.
• Flexibility in planning and scheduling of concrete pours.
• Concrete containing SikaTard 930 and used for shotcrete applications can be accelerated by Sigunit accelerators at any time. Concrete which is pumped or placed conventionally can be accelerated using accelerators such as SikaSet NC and Plastocrete 161FL at any time.

Colour

Clear liquid.

Packaging

20 litre pail
205 litre (54 US gal.) drum
1040 litre (275 US gal.) tote and bulk delivery