Construction chemicals are admixtures that are used with concrete, cement, and other construction materials to provide additional durability and workability to various structures. Concrete admixtures can provide some beneficial effects on concrete. Such as accelerating condensation, slow curing, reducing water consumption, and increasing plasticity. Sodium gluconate is a white to tan granulated to fine crystalline powder. It is highly soluble in water. Sodium gluconate powder can be used as a concrete admixture in construction. It has the function of a water reducing agent and a retarder in concrete. Sodium gluconate concrete admixture is usually used alone, but it can also be used in combination with other retarders.
|Appearance||White crystalline powder|
|Purity %||98 Min|
|Loss on drying %||0.50 Max|
|Sulfate (SO42-) %||0.05 Max|
|Chloride (Cl) %||0.07 Max|
|Heavy metals (Pb) ppm||10 Max|
|Reduzate (D-glucose) %||0.7 Max|
|PH (10% water solution)||6.2~7.5|
|Arsenic salt(As) ppm||0.2 Max|
|Packing & Loading||25 kg/PP bag, 26tons in 20’FCL without pallets; 1000kg/Jumbo bag on a pallet, 20MT in 20’FCL; 1150kg/Jumbo bag on a pallet, 23MT in 20’FCL;|
Kingsun Sodium Gluconate for Concrete
Kingsun sodium gluconate concrete retarder can significantly delay the setting time of concrete. When the amount of sodium gluconate is 0.15% or less, the amount of sodium gluconate in concrete is double, the time of concrete initial setting will be delay by ten times. This prolongs the work time of concrete from a few hours to a few days without losing its strength.
Nowadays, the concrete in many places is transported to the construction site after mixing in the plant area. If the concrete solidifies during this period of time, the construction will not be carried out. At this time, it is necessary to add sodium gluconate admixture to the concrete. Because it can retard the concrete and enhance the plasticizing performance of the concrete.
In addition, due to the large volume of the infusion project, it is difficult to construct. Adding sodium gluconate to concrete can improve the working performance of concrete and delay the setting time of concrete. Thus avoiding the formation of joints on the structure and improving the structural strength. That is conducive to the implementation of large-volume perfusion projects.
As a water reducing agent, sodium gluconate for concrete can make concrete mixes have better processability and increase concrete slump. By adjusting the water-cement ratio and adding sodium gluconate, the strength of the concrete structure can be enhanced. Besides, the cement content can be reduced while maintaining the original strength of the concrete. By adding sodium gluconate to the concrete, you can get the following results:
- Improve the workability of concrete. When the water-cement ratio is constant, the addition of sodium gluconate can improve the workability of concrete.
- Improve the strength of concrete. When the cement content remains constant and the water content of the concrete decreases. With 0.1% sodium gluconate added, the concrete water consumption can be reduced by 10%.
- Reduce cement and water. The addition of sodium gluconate can reduce the cement content to the same proportion of water consumption. The overall water-cement ratio of the concrete remains unchanged.
At present, the existing production methods of sodium gluconate include homogeneous chemical oxidation method, point solution oxidation method, heterogeneous catalytic oxidation method, enzyme reaction method, and fermentation method.
Sodium gluconate produced by homogeneous chemical oxidation has the advantages of high conversion rate, simple process, and low cost. However, there are many steps and many by-products, and the product is difficult to decompose, so its application is limited.
The point oxidation method is rarely used in industrial production because of its high energy consumption and difficulty in control.
The heterogeneous catalytic oxidation process is simple, the reaction is stable and easy to control, the reaction conditions are mild, and the glucose conversion rate is about 95%. The disadvantage is that after being recycled for a certain number of times, the catalytic effect is reduced, the glucose conversion rate is reduced, the reaction time is prolonged, and even the catalyst has no catalytic activity. Therefore, the catalyst must be scrapped and replaced, which correspondingly increases the catalyst consumption per unit product and makes the production cost of sodium gluconate higher.
Biological fermentation methods include fungal fermentation and bacterial fermentation processes, of which the process of preparing sodium gluconate by Aspergillus niger fermentation is more commonly used. In this process, glucose is used to obtain glucose lactone and hydrogen peroxide by simple dehydrogenation of glucose oxidase produced by Aspergillus niger, and a certain amount of NaOH solution is added to maintain a certain pH value to obtain sodium gluconate. The biological fermentation method has gradually become the main production method of sodium gluconate.
The enzymatic method is to use enzyme preparation (glucose oxidase plus catalase) to oxidize glucose to gluconic acid while adding NaOH to neutralize to produce sodium gluconate and then it is finished. The enzymatic method saves nutrients and auxiliary materials, the process is simple, the product purity is high, and the energy consumption is low. But glucose oxidase and catalase are more expensive. However, as the level of enzyme preparations increases, the activity of enzymes increases, and the cost of enzymes decreases. In the long run, the replacement of fermentation processes by enzymatic processes will become the future development trend of the industry.
Where to Buy Sodium Gluconate Admixture
If you are going to buy sodium gluconate uses in construction or concrete, then Henan Kingsun Chemical Co., Ltd. is your good choice. As a leading construction chemcials manufacturer in China, We have more than 15 years of experience in this industry. We always regard efficiency, innovation, and practicality as our business philosophy.
- Kingsun has its own factory and R & D team, so we have sufficient inventory, and we can also arrange delivery for customers in time. More importantly, we promote our products to the international market at a very competitive price.
- All of our products have passed ISO9001 quality management system, ISO14001 environmental management system, safety management system, etc.
- We always provide high-quality products and excellent service for all the clients, so we have already established a long-term cooperative relationship with many customers.
- Kingsun products have exported to around 30 countries and regions, they are Israel, Indonesia, Thailand, Philippines, Vietnam, Malaysia, Singapore, Qatar, Brazil, Turkey, UAE, Saudi Arabia, Pakistan, Bangladesh, Bahrain, Mexico, Chile, South Africa, Russia, etc.