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1.Introduction
The retarder is of an anionic surfactant with its main ingredient of the organic compound and has strong retarding effect on all types of cements and concretes.
With low dosage, it can highly improve the time of the concrete setting and hardening and reduce the temperature cracking of concrete while having the excellent compounding effect with all series of the high range water reducers, especially with those of the polycarboxylate and naphthalene sulfonate superplasticizer.
It greatly reduces the cost of compounding and has strong constraining force against the slump loss.
Being free of alkali, nontoxic, nonflammable and no harm to human body, it is widely used in the concrete projects, like ports, tunnels, bridges, as well as the concrete projects of all kinds of the industrial and civil construction under the condition of high temperature in summer season.
| Appearance | Brown Liquid |
| Solid content | ≥35% |
| Fineness | 0.15mm sieve residue <15% |
| PH value | 7-9 |
| Water reducing rate | 15-25% |
| Dosage | 0.75 - 1.5% (recommend 1.0% ) |
| The initial slump of concrete | Increased more than 15cm |
| The corrosion on steel | No |
When compounding, Low dosage will result in the excellent effect on the retarding and slump retention.
High performance for retarding. The setting time can be adjusted according to the requirement for the project. However, its retarding effect should be based on the good dispersion at the early stage.
Improving the workability and reducing the slump loss.
Perfect compounding effect with the high range water reducers of polycarboxylate and naphthalene sulfonate superplasticizer.
Delaying the peak time of the heat release during the hydration heat and reducing the concrete cracking caused by the temperature stress in the concrete.
As a retarder, free of Alkali, it can highly strengthen the durability of the concrete.
3. Key Points for Technical Application
The product is in conformity with the requirements for the performance of the concrete admixture stipulated by GB8076-2008(China) and ASTM C494 Type B (U.S.A.). The dosage should be made according to the specific technical requirement for the concrete.
It has its wide multifunction. When being used in combination with the other additives in concrete, trial mixes should be made to determine the setting time and workability for the optimum dosage.
Accurate calculation for the dosage should be made and excessive dosage should be avoided.
The product is applicable for concrete curing at the temperature above 0 centigrade.
4. Packing and Storage
The product is in liquid form. Drum or Flexitank Packing
Store in cool and ventilated place. Shelf life: one year
The product is existed in the form of weak acid. Skin contacting should be avoided. Rinsing by water in case of contacting with skin.
Sodium Gluconate For Concrete Set Retarder
