KimaCell® HEMC MH40M hydroxyethyl methyl cellulose has a certain influence on the setting time of cement mortar, and the setting time is tested by using a consistency meter.The addition of hydroxyethyl methyl cellulose will affect the setting time of cement mortar, the initial setting time is reduced by 30 minutes, and the final setting time is increased by 5 minutes, indicating that cellulose does have better water retention, and at a lower dosage of 0.5 Effect on coagulation time when the concentration is below %.
It does not change with the change of cellulose ether concentration. The addition of hydroxyethyl methyl cellulose does not affect the setting time of cement mortar too much, and has little effect on engineering applications.
|Chemical name||Hydroxyethyl Methyl Cellulose|
|Synonym||Cellulose ether, 2-hydroxyethyl methyl cellulose, Cellulose, 2-hydroxyethyl methyl ether, Methyl hydroxyethyl cellulose, HEMC, MHEC|
|Product Grade||HEMC MH40M|
|Solubility||Water Soluble Cellulose ether|
|Physical form||White to off-white cellulose powder|
|Viscosity Brookfield 2% solution||16000-24000mPa.s|
|Viscosity NDJ 2% solution||32000-48000mPa.S|
|Mesh size||99% pass 100mesh|
KimaCell® HEMC MH40M Cellulose ether is a commonly used concrete viscosity modifier. It is widely used in self-compacting concrete and grouting materials. It can improve the cohesion of cement-based materials and the uniformity of hardened structure. The effect of HEMC as a viscosity modifier on the fresh properties, mechanical properties, and drying shrinkage of mortar, and the mechanism of action were analyzed according to the non-evaporating water content and pore structure, and the positive effect of HEMC modification in iron tailings sand cement mortar was demonstrated.
HEMC will significantly increase the viscosity of mortar, and its combined use with water reducing agent can control the fluidity in an appropriate range and reduce the bleeding rate of mortar.
With the increase of HEMC content, the compressive strength of mortar specimens 7d and 28d first increased and then decreased, and reached the maximum when the HEMC content was 0.3%.