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Triethanolamine (TEA)

Views: 5     Author: su     Publish Time: 2018-12-13      Origin: Site


Triethanolamine (TEA)

Triethanolamine (TEA) and its solution are used as engineering admixtures and early strength agents in the cement clinker grinding process, which can not only prevent the aggregation and air cushion of the pulverization process, improve the fluidity and packing density of the cement, but also Reduce the power consumption of the pulverizer, increase production efficiency, increase production capacity, and increase the fineness of cement and improve the quality of cement products.

In the actual cement industry, a large amount of energy is consumed in the grinding of raw materials and clinkers. During the grinding process, the free charge density on the surface of the cement particles increases, the free energy of the solid surface increases, and the collision between the particles increases the probability of agglomeration and adhesion of the particles. If the cement particles are further ground, The need for additional factors to destroy this tendency of agglomeration and adhesion, and the use of grinding aids is the most simple and convenient method, the addition of grinding aid investment is less effective, and can effectively improve the physical quality of cement. At present, the common organic material grinding aids at home and abroad are alkanolamines and polyhydric alcohols, such as triethanolamine, diethanolamine, triisopropanolamine, etc., among which triethanolamine is a very polar alcoholamine, aqueous solution It is alkaline and has a certain grinding effect on cement. It can quickly improve the early strength of cement, increase production capacity and reduce the loss of raw materials.

Points for attention in the use of triethanolamine. Although the addition of triethanolamine can improve the water reducing effect of the polycarboxylic acid water reducing agent, it has a certain negative impact on the preservation effect. The incorporation of triethanolamine extends the setting time of the concrete. When it is combined with polycarboxylate water reducing agent, the dosage should not be too much, otherwise the cement hydration speed will be delayed, the concrete demoulding time will be prolonged, and the construction efficiency will be reduced. In many projects, in order to speed up the project schedule and shorten the construction period, it is necessary to use concrete early strength agent or early strength water reducer to accelerate the hydration speed of the cement, improve the early strength of the concrete, and ensure the smooth completion of the project. In practical engineering applications, composite early-type water-reducing agents are mostly used. The purpose of using the composite early strength water reducing agent is to ensure the good construction performance of the fresh concrete under the lower water-binder ratio conditions and to promote the cement hydration process and improve the early strength of the concrete.

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