Concrete Superplasticizers-Capconorm SPNR

CapcoNorm SPNR is a superplasticizer, strong water reducer, and retarder used to significantly increase the flowability of concrete/mortar, especially for pouring concrete in hot weather, without altering the water-to-cement ratio or to reduce the water-to-cement ratio without compromising flowability. This additive also maintains slump consistency over time.

This product is manufactured in accordance with the general requirements of the Iranian National Standard No.2930-1 and the performance requirements specified in Tables 1-11 and 2-11 of the Iranian National Standard No.2930-2. Additionally, this additive complies with Grade G requirements of ASTM C494 standard and Table 1 of EN 934-1 standard, as well as the requirements of Tables 1-11 and 2-11 in EN 934-2 standard.

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The advantages of using a concrete superplasticizer include:

• Reducing the water-to-cement ratio results in consistent workability and a significant increase in compressive strength.
• Reduced water-to-cement ratio leads to decreased water absorption and permeability due to the reduction in water content relative to cementitious materials.
• Increasing the abrasion resistance of concrete due to the reduction in the water-to-cement ratio.
• Better cement dispersion, improved compactability in various conditions, and increased compressive strength at a consistent water-to-cement ratio.
• Delay in initial and final setting time.

The use of concrete superplasticizers:

• Production and implementation of various types of reinforced and non-reinforced concrete, including self-compacting concrete, pumped concrete, pozzolanic concrete, lightweight concrete, precast concrete elements, prestressed concrete, decorative concrete, and more.
• High-volume concrete pours with high thickness.
• Production of ready-mix concrete and enabling the possibility of longer transport distances using delayed setting time.
• Production of concrete with a water-to-cement ratio between 0.40 to 0.45.
• Production of cement-based mortars.

Range and Method of Using Additives in Concrete:

Permissible Range for Using Additives in Concrete:

The permissible range of using CapcoNorm SPNR is from 1.0 to 2.0 percent by weight of cementitious materials (1000 to 2000 grams per hundred kilograms of cementitious materials, including cement, silica fume, slag, fly ash, and other similar pozzolans). The determination of the optimal amount of the additive should be based on the specifications of the mix design and the operational and weather conditions, and ultimately, trial mixes should be made. Exceeding the declared permissible limit may have consequences such as segregation, bleeding, and/or an immediate increase in concrete setting time, especially for concrete containing retarding cements.

How to Mix Concrete Superplasticizer:

To use the additive, it is necessary to dilute it with water in double the volume of the additive. Then, add it to the concrete when it has reached a low initial slump. Additionally, the following points should be observed:

After adding the additive, the concrete should be thoroughly mixed for 2 to 5 minutes to ensure complete blending, and uniform distribution of the additive in the concrete.
This additive should not come into direct contact with dry cement or dry aggregate materials.
The volume of water used to dilute the additive (before adding it to the concrete) should be subtracted from the total mixing water in the concrete.
If there is a desire to significantly increase the slump of fresh concrete, the mix design must be formulated in a way that prevents segregation and excessive bleeding of the concrete.

Physical and Chemical Specifications of Concrete superplasticizer (CapcoNorm SPNR)

Physical State: Liquid
Color: Brown
Chemical Base: Poly naphthalene sulfonate
Density: 1.18 ± 0.02 g/cm³
Chloride Content: Negligible
Equivalent Alkali Content (Na₂O): 3%
pH 6 ± 1
Freezing Point: -2°C

Safety Precautions When Using Concrete Plasticizer:

• In case of contact with this additive in the eyes, the person should rinse the eyes with water for at least 15 minutes, keeping the eyelids open.
• In case of contact with this additive on the skin, promptly wash the contaminated skin with clean water for 15 minutes.
• Contaminated clothing should be washed with appropriate cleaning agents before reuse.
• If the affected person continues to experience discomfort, it is necessary to seek medical attention promptly.

Concrete Superplasticizers-Capconorm SPNR

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