Pozzolanic Products-CapcoGel D

Supplementary Materials Containing Silica Fume and Water-Reducing Admixture (CapcoGel D)

Capcogel D is a supplementary material containing microsilica with strong pozzolanic properties, along with a powerful superplasticizer and water reducer. It is used to increase the fluidity of concrete/mortar without changing the water-to-cement ratio or to reduce the water-to-cement ratio without decreasing fluidity. This product, with its strong pozzolanic properties, reacts with calcium hydroxide resulting from hydration. The secondary products of this pozzolanic reaction reduce the permeability of concrete and enhance its mechanical strength and abrasion resistance.

The microsilica present in this product complies with the general requirements of the national standard of Iran numbered 13278, as well as the specifications mentioned in ASTM C1240 and EN 13263-1 standards. Additionally, the superplasticizer in this product also meets the performance requirements outlined in Tables 1-3 and 2-3 of the national standard of Iran numbered 2930-2, the Grade F requirements of ASTM C494, and Tables 1-3 and 2-3of EN 934-2 standard.

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The advantages of using a HyperGel include:

• Reducing the water-to-cement ratio in concrete results in uniform consistency and increased compressive strength at 7 and 28 days.
• Improved Cement Distribution, Enhanced Compaction Ability in Various Conditions, and Increased Compressive Strength at Equal Water-to-Cement Ratios.
• Significant reduction in water absorption and permeability is achieved due to the decrease in the water-to-cement ratio and the presence of microsilica in the additive material.
• Reduced risk of corrosion for reinforcement bars in chloride environments.
• Reduced risk of alkali-silica reactions.
• Easy transportation, storage, and usage without generating dust on the production and construction site, along with adhering to health and safety principles to protect the personnel's well-being.

The use of HyperGel:

• All types of Concrete Structures
• Production of High-Strength Ready-Mix Concrete
• Production of High-Strength Precast Components
• Installation of Industrial and High-Strength Concrete Floors
• Production and Application of Shotcrete
• Production of Low Permeability Concrete
• Production of Concrete in Areas with Moderate to High Corrosion Risk
• Producing concrete with a water-to-cement ratio between 0.4 to 0.45

Range and Method of Using HyperGel in Concrete:

Permissible Range for Using HyperGel in Concrete:

The allowable range for the use of microsilica gel or CapcoGel D is from 8 to 18 percent by weight of cementitious materials (8 to 18 kilograms per hundred kilograms of cementitious materials, including cement, silica fume, slag, fly ash, and other similar pozzolans). The optimal dosage of this additive should be determined based on the specifications of the mix design, environmental conditions, and actual execution, considering the creation of experimental mixtures. Exceeding the specified limit may result in issues such as segregation, bleeding, and an immediate increase in concrete setting time, especially for concrete containing retarder cements. If reactive silica aggregates are present in the concrete, the minimum required dosage of the additive must be determined in the laboratory.

How to Mix HyperGel with concrete:

Hypergel should be added to the concrete mix at the batching plant and during the mixing of concrete components. Additionally, the following points should be observed:

After adding the additive, the concrete should be thoroughly mixed for 2 to 5 minutes, ensuring uniform distribution of the additive throughout the concrete.
This additive should not come into direct contact with dry cement or dry aggregates.
55% of the weight of this additive should be subtracted from the mixing water used for the concrete.

Physical and Chemical Specifications of HyperGel:

Physical state: Gel
Gel color: Dark gray
Microsilica content in the gel: 40%
Chemical base of the superplasticizer in the gel: Polycarboxylate ether
Density: 1.30 ± 0.02 g/cm³
Chloride content: Negligible
Alkaline materials equivalent (Na₂O): Negligible
pH: 7 ± 1
Freezing point: 0 degrees Celsius

Safety Precautions When Using HyperGel:

• This product should not be poured in the working environment. After drying, it can contaminate the surrounding air with airborne particles, making breathing in this environment hazardous.
• 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.

Pozzolanic Products-CapcoGel D

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