Concrete Superplasticizers – CapcoNorm SPCR218

CapcoNorm SPCR218 is a superplasticizer for concrete, a high-range water reducer, and a retarder. It is used to significantly increase the flowability of concrete/mortar, especially for concrete pouring in hot weather, without changing the water-to-cement ratio, or to reduce the water-to-cement ratio without reducing flowability. This additive also maintains the slump over time.

This product is produced in accordance with the general requirements of the Iranian National Standard No. 2930-1 and the performance requirements of Tables 1-11 and 2-11 in the Iranian National Standard No. 2930-2. Additionally, this additive complies with the 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 the 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 flowability 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.
  • • 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, increasing concrete workability window.
The use of concrete superplasticizers:
  • • Production and implementation of various reinforced and non-reinforced concrete types, including self-compacting concrete, pumped concrete, pozzolanic concrete, lightweight concrete, decorative concrete, etc., in hot weather conditions.
  • • Pouring large-scale concrete in high thickness.
  • • Production of ready-mix concrete and enabling longer transportation of concrete using delayed setting.
  • • 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 for the use of CapcoNorm SPCR218 is from 0.5 to 1.5 percent 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 mix design specifications and the prevailing execution and environmental conditions. Exceeding the declared limit may lead to consequences such as segregation, water bleeding, and an increase in the initial setting time of concrete, especially for concrete containing retarding agents.

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, it is necessary for the concrete mix design to be prepared in such a way that the concrete does not experience segregation and water bleeding.
Physical and Chemical Specifications of Concrete superplasticizer (CapcoNorm SPCR218):
  • Physical State: Liquid
  • Color: Colorless to amber
  • Chemical Base: Polycarboxylate ether
  • Density: 1.07 ± 0.02 g/cm³
  • Chloride Content: Negligible
  • Equivalent Alkali Content (Na₂O): 0.8%
  • 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.
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