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Cellulose Ether Air Entrainment

Views: 11     Author: Site Editor     Publish Time: 2020-06-23      Origin: Site

Cellulose Ether Air Entrainment

Cellulose ether has obvious air-entraining effect on freshly mixed cement-based materials. Cellulose ethers have both hydrophilic groups (hydroxyl groups, ether groups) and hydrophobic groups (methyl groups, glucose rings). It is a surfactant with surface activity and thus has an air-entraining effect. The air entrainment of cellulose ether will produce a "ball" effect, which can improve the working performance of freshly mixed materials, such as increasing the plasticity and smoothness of mortar during operation, which is beneficial to the spread of mortar; it will also increase the output of mortar , Reduce the production cost of mortar; but will increase the porosity of the hardened material, reduce its mechanical properties such as strength and elastic modulus.

As a surfactant, cellulose ether also has a wetting or lubricating effect on cement particles, which together with its air-entraining effect increases the fluidity of cement-based materials, but its thickening effect will reduce the fluidity. The effect of fluidity is a combination of plasticizing and thickening effects. Generally speaking, when the amount of cellulose ether is very low, it mainly shows plasticization or water reduction; when the amount of cellulose ether is higher, the thickening effect of cellulose ether increases rapidly, and its air-entraining effect tends to be saturated. So it is manifested as thickening or increasing water demand.

PTMA TECH is a provider of  admixture for construction mortar, coatings & paints and concrete, plastic chemicals, which has three plants with R&D……
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