Sodium gluconate

Sodium gluconate

Gluconic acid, sodium salt

D-sodium gluconate

Sodium gluconate is an organic substance with a chemical formula of C6H11NaO7. It can be used as a high-efficiency retarder and high-efficiency water-reducing agent in the concrete industry.

Overview

Chemical formula: C6H11NaO7

CAS: 527-07-1

Melting point: 206 C

Appearance: white crystalline particles or powder

Alias: D-sodium gluconate

Index range

Index name Standard

Content 98.0% min

Loss on drying 1.0% max

Heavy metals (calculated as Pb) 0.002% max

Lead (Pb) 0.001% max

Sulfate (SO4) 0.05% max

Reductant 0.5% max

Use

It can be used as a retarder for CSA cement and cement admixture

After adding a certain amount of sodium gluconate to cement, it can increase the plasticity and strength of the concrete, and it has a retarding effect.

Sodium gluconate as water reducer

By adding a water reducing agent, the water-cement ratio (W/C) can be reduced. The following effects can be obtained by adding sodium gluconate: 1. Improve workability. When the water-cement ratio (W/C) remains unchanged, adding sodium gluconate can improve workability. At this time, sodium gluconate acts as a plasticizer. When the addition amount of sodium gluconate is below 0.1%, the degree of improvement in workability is proportional to the addition amount. 2. Improve strength. When the cement content remains the same, the water content in the concrete can be reduced (that is, W/C is reduced). When the amount of sodium gluconate added is 0.1%, the amount of water added can be reduced by 10%. 3. Reduce cement content. The water and cement content is reduced in the same proportion, and the W/C ratio remains unchanged.

Sodium gluconate as retarder

Sodium gluconate can significantly delay the setting time of concrete. When the dosage is less than 0.15%, the logarithm of the initial setting time is directly proportional to the dosage, that is, the dosage is doubled, and the initial setting time is delayed to ten times, which makes the working time from very few The hours are extended to a few days without compromising the strength. This is an important advantage especially in hot weather and when it needs to be placed for a long time.

Packing

25KG/bag