KimaCell® HEMC MH20M hydroxyethyl methyl cellulose can be used to build mortar that has more pores and pliants. When the mortar test block is folded, the pores will reduce the flexural strength of the mortar, and the flexible polymer will increase the flexural strength of the mortar. Therefore, the two are the same The influence will make the flexural strength of the mortar decrease to a small extent. When the test block is under pressure, one is that the composite matrix is relatively weakened because the pores and flexible polymers can not play a supporting role, resulting in a decrease in the compressive resistance of the mortar; Most of them remain in the mortar, and the actual water glue is much larger than that to be mixed, so the compressive strength of the mortar will be significantly reduced.
HEMC is mixed into the mortar, which greatly improves the water retention of the mortar, so that when it is in contact with the air-entrained concrete, the water is not easily absorbed by the concrete with high water absorption rate, thus ensuring that the cement in the mortar can be hydrated more completely.
HEMC penetrates into the surface of air-entrained concrete at the same time to form a new bonding surface. The surface has good strength and flexibility, and the bonding strength with air-entrained concrete higher.
|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 MH20M|
|Solubility||Water Soluble Cellulose ether|
|Physical form||White to off-white cellulose powder|
|Viscosity Brookfield 2% solution||10000-20000mPa.s|
|Viscosity NDJ 2% solution||16000-24000mPa.s|
|Mesh size||99% pass 100mesh|
KimaCell® HEMC MH20M Cellulose ether is mixed into the mortar, it can play a dual role of water retention and thickening. When the dosage is only 0.2%, it can greatly reduce the delamination of the plastering mortar for air-entrained concrete and improve the water retention of the mortar. , play a very good role in water retention.
HEMC has an air-entraining effect, improves the workability of mortar, and significantly reduces the dry density of mortar, and the greater the amount of HEMC, the smaller the dry density of mortar.
When HEMC is added to the mortar, the flexural strength of the mortar decreases slightly, while the compressive strength decreases greatly, and the bending ratio curve shows an upward trend, indicating that the addition of HEMC can improve the toughness of the mortar.
HEMC has a good water retention effect, which prevents the air-entrained concrete from quickly absorbing the water in the plastering mortar, ensures that the cement in the mortar is fully hydrated, and makes the combination of the mortar and the air-entrained concrete more dense and the bond strength higher.