Industry News

Analysis of the relationship between the amount of Sodium Gluconate used in concrete and its effect.

In the construction of large-scale projects, the fast setting of concrete has always been the most troublesome problem. The common admixture product Sodium Gluconate can effectively enhance the plasticity and strength of the cement in the concrete, and delay the initial setting and final setting time of the concrete. Especially in the current building construction, the concrete materials are all mixed in the factory and pulled to the construction site for use, so the concrete setting time is even more important. Is it true that the more sodium gluconate blended, the better the coagulation effect?

The reaction of sodium gluconate in cement includes chemical shrinkage, heat of hydration, resistivity, etc., but it is mainly manifested in inhibiting cement stiffness, delaying cement setting time, and making the ratio of water and cement in concrete more scientific and more effective. However, the use of sodium gluconate as a retarder does not mean that the more parameters, the better the effect.

Sodium Gluconate has a critical content value, the standard is 0.3%~0.5%. When the dosage is less than the critical dosage, the initial setting time and retardation time increase slowly, and will increase with the increase of the dosage; when the dosage exceeds the critical dosage, with the increase of the dosage, the initial setting time will increase. will increase slowly, and final setting time will increase rapidly and vary with time.

Sodium gluconate can effectively inhibit the chemical shrinkage reaction of cement, thereby increasing the setting time of concrete. The chemical shrinkage increases with the increase of the content within 0-10 hours, and decreases with the increase of the parameters after 10 hours. When the content reaches 0.2%, the retarding effect is the weakest.

Through a large number of studies and experiments, it has been proved that the consistent use of sodium gluconate and high-efficiency water-reducing agent has a very obvious effect on improving water-reducing rate, reducing slump loss, and improving the adaptability of water-reducing agent and cement. On the use of sodium content, we must think deeply, carry out scientific research experiments, and ensure the maximum safety of engineering construction as much as possible.

BAILIN GROUP is a major large-scale enterprise for producing and sales Sodium gluconate in China. dedicated to the production of sodium gluconate for more than 20 years,private OEM package can be made for customers .welcome to contact us for more details about SG .I believe we will not let you down.