Triethanolamine is a colorless transparent viscous liquid at room temperature with a slight ammonia smell. It is hygroscopic and can absorb water and carbon dioxide from the air. Can be arbitrarily mixed with water and alcohol, soluble in chloroform, slightly soluble in benzene and ether. The pH of 0.1moI/L solution is 10.5. There is a risk of combustion in the event of high fever, open fire or contact with oxidants. Its aqueous solution is corrosive.
Why Can Triethanolamine Be Used As Concrete Early Strength Agent?
Triethanolamine is a commonly used early strength agent in cement industry. The function of early strength agent is to accelerate the hydration process of cement and improve the early strength in the presence of liquid phase in concrete.
Although triethanolamine does not change the hydration products of cement, it can enhance the activity of cement hydration colloid, produce pressure on the surrounding, block the capillary channel, and aggravate the role of adsorption, wetting and particle dispersion, etc. promote the formation of calcium sulphoaluminate hydrate reaction between C3A and gypsum, which can improve the compactness, impermeability and frost resistance of concrete, and play the role of early strength and strength.
When used in combination with inorganic salt materials, it can catalyze the hydration of cement itself and the reaction between inorganic salts and cement, so the effect of early strength is particularly significant.
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