Sodium Gluconate can not be replaced by five reasons
Why is Sodium Gluconate unable to replace? What makes it take such an important position?
Mainly by the five aspects to decide, it is these five functions and uses that makes Sodium Gluconate has been favorable.
First, for the steel surface cleaning agent:
Steel surface such as the need for plating, chrome, tin, nickel to adapt to special purposes, such as the manufacture of tinplate, galvanized sheet, the surface chrome (electricity), the billet surface are subject to strict cleaning.
So that the coating with the steel surface firmly bonded, this time its cleaning agent to add Sodium Gluconate will achieve a very satisfactory results.
Second, as a cement admixture:
Cement to add a certain amount of Sodium Gluconate, can increase the plasticity and strength of concrete, and a blocking effect.
Third, that is, the initial and final solidification period of concrete, such as the addition of 0.15% Sodium Gluconate, the concrete can be the initial setting time of more than 10 times longer, that is, the plastic plastic time from a few hours extended to a few days, Affect its fastness.
Plasticity and retardation The initial setting time is a very important problem in concrete operations. For example, in the high temperature season construction and large engineering operations, it is a difficult problem to delay the initial setting time. Sodium Gluconate can solve this problem satisfactorily.
In addition, it is difficult to glue the oil wells at high temperature. The concrete with the addition of Sodium Gluconate can be plasticized at 170 ℃ for several hours, so it can solve the above problems satisfactorily.
Therefore, Sodium Gluconate as a cement admixture in foreign countries has been widely used in important construction projects, such as a large number of bridges in the Middle East.
But our domestic application in this area has not yet been applied, it is said that in the papermaking wastewater extraction of sodium cellulose sulfonate, the effect and Sodium Gluconate is simply comparable.
In addition can also be used in electroplating, film manufacturing industry.
As a polyhydroxycarboxylic acid type of excellent corrosion inhibitor scale Sodium Gluconate, due to the above-mentioned many specific properties, such as in the application of technology willing to work hard, will be developed into a large industry.
Fourth, the application of Sodium Gluconate in the construction industry:
The concrete is a composite material made of cement, aggregate, blending agent and water. Concrete is the largest amount of all artificially manufactured material.
Three quarters of the concrete is aggregate, but the most active ingredient in the concrete is the cement slurry. The properties and properties of concrete are mainly determined by the nature of the cement slurry.
Admixtures in concrete can provide beneficial effects such as accelerated solidification, retardation of solidification, the presence of air bubbles, reduced water consumption and increased plasticity, and so on.
Typically, several admixtures are used in the cement, and various admixtures can be reinforced in some applications. Sodium Gluconate can be used as a blending agent in concrete. Its function in concrete is as follows: water reducing agent and retarder, Sodium Gluconate is generally used alone, but it can also be used with other retarders such as carbohydrates and phosphates Used together. Sodium Gluconate is a crystalline powder. Is produced under the conditions of proper regulation and control.
5, Sodium Gluconate as a water reducing agent:
By adding a water reducing agent, the water to cement ratio (W / C) can be reduced.
By adding Sodium Gluconate, the following effects can be obtained:
1, to improve the work of water to cement ratio (W / C) the same circumstances, adding Sodium Gluconate can improve workability.
At this time, Sodium Gluconate is the role of plasticizer. When the amount of Sodium Gluconate is less than 0.1%, the degree of improvement in work is proportional to the amount added.
2, enhance the strength When the cement content remains constant and the water content of concrete can be reduced (ie, W / C reduced). When the amount of Sodium Gluconate added 0.1%, the amount of water can be reduced by 10%.
3, reduce the cement content, water and cement content to reduce the proportion of the same, W / C ratio remains unchanged. At this point, Sodium Gluconate as a cement reducing agent. Under normal circumstances, the following two aspects of the performance of concrete is very important: shrink and produce heat.