Concrete Superplasticizers-Capconorm SPN265

CapcoNorm SPN265 is a superplasticizer, strong water reducer, and retarder used to significantly increase the flowability of concrete/mortar without changing the water-to-cement ratio or reducing flowability.

This product is manufactured according to the general requirements of the Iranian National Standard No.293-1, as well as the performance specifications outlined 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 specifications of Tables 1-11 and 2-11 of EN 934-2 standard.

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The advantages of using a concrete superplasticizer include:

• Reducing the water-to-cement ratio in concrete results in uniform consistency and increased compressive strength at 7 and 28 days.
• 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.
• Improved Cement Distribution, Enhanced Compaction Ability in Various Conditions, and Increased Compressive Strength at Equal Water-to-Cement Ratios.
• Delay in initial and final setting time and increased workability of concrete.

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-Quality Cement-Based Mortar Production
• Production of concrete with a water-to-cement ratio between 0.40 to 0.45
• Reducing construction costs due to increased speed in concrete pouring and formwork removal operations.

Range and Method of Using Additives in Concrete:

Permissible Range for Using Additives in Concrete:

The permissible range for the use of CapcoNorm SPN265 is from 0.5% to 1.5% by weight of cementitious materials (500 to 1500 grams per hundred kilograms of cementitious materials including cement, silica fume, slag, fly ash, and other similar pozzolans). The optimum dosage of the additive should be determined based on the mixture design specifications and the prevailing construction and weather conditions. Exceeding the declared limit may lead to consequences such as segregation and water bleeding.

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.

Physical and Chemical Specifications of Concrete superplasticizer (CapcoNorm SPN265):

Physical State: Liquid
Color: Brown
Chemical Base: Poly naphthalene sulfonate
Density: 1.18 ± 0.02 g/cm³
Chloride Content: Negligible
Equivalent Alkali Content (Na₂O): 2.5%
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 SPN265

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