Effect of hydroxyeethylcellulose on denological properties of cement mortar

The effects of the viscosity of hydroxyethyl methyl cellulose viscosity of new cement mortar were studied. For unmodified HEMC, the greater the viscosity. The lower the yield stress and plastic viscosity; the viscosity change of modified ological properties of mortar. And the greater the viscosity of HEMC, the more obvious the development of mortar yield stress and plastic viscosity. When dosage is greater than 0.3%, the mortar yield stress and plastic viscosity increase. When HEMC dosage is large, the mortar yield stress decreases and the plastic viscosity increases with time.

HEMC viscosity change, modification, and mixing change can significantly affect the rheological energy of mortar. Which can be reflected by the two parameters: yield stress and plastic viscosity. For unmodified , the greater the viscosity, the lower the mortar yield stress and plastic viscosity within 0-120min. The viscosity change of modified decreases the unmodified; the greater the viscosity delays the development of mortar yield stress and plastic viscosity.

When the mortar yield stress of 40 with 40,000 m P a s viscosity is greater than 0.3%. When the mixture exceeds 0.9%, the mortar yield stress begins to decrease with increasing time. The mortar plastic viscosity increases; when the mixture exceeds 0.7%, the mortar plastic viscosity begins to increase with increasing time.

HEMC

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