Water retention is a measure of HPMC hydroxypropyl methylcellulose reuse, water retention performance of good and bad also is affected by many domestic manufacturers of dry mortar, especially high temperature climate of southern factory attention, at the same time, there were many reasons affecting the effects of dry powder mortar water, such as adding volume, viscosity, particle fineness as well as the use of the environment, temperature, etc.
In the dry-mixed pre-mixed mortar process, the addition amount of hydroxypropyl methyl cellulose is low. Although the addition amount is low, it can obviously improve the performance of wet mortar, which is also a main additive affecting the construction performance of mortar. Therefore, the scientific and reasonable selection of cellulose ether with different brands, different viscosity, different particle fineness and addition amount has a great influence on the improvement of dry-mixed ready-mixed mortar performance.
For the current building environment, now many masonry and plastering mortar water performance is not ideal, a quiet place for a few minutes would be a water slurry separation, and water retention is hydroxypropyl methylcellulose ether a major role, water-soluble cellulose ether in the ready-mixed mortar has a more important role, the role of main surface has three, one, Relatively good water retention performance, secondly, the influence on the consistency and thixotropy of ready-mixed mortar, thirdly, the influence of the interaction with cement. Hydroxypropyl methylcellulose water retention performance mainly depends on the base of water absorption, composition of mortar, mortar layer thickness, and mortar water requirements, and the condensation time of the condensation material, for cellulose ether self water retention, mainly from the natural dissolution and dehydration of cellulose ether.
Hydroxypropyl methylcellulose plays an important role in the process of dry-mixed ready-mixed mortar, which can play a role in water retention, thickening, delaying the hydration power of cement, and can improve the performance of construction. Good water retention performance can make cement hydration more comprehensive, can improve the wet viscosity of wet mortar, so as to improve the bonding strength of mortar, but also can adjust the time. Adding hydroxypropyl methylcellulose ether in the process of dry mixed ready-mixed mortar can improve the construction performance of mortar, can improve the structural strength, so as to be widely used in the field of mortar application.