mortar additive hpmcMay 11th 2023
hydroxypropyl methylcellulose HPMC in Plastering Mortar
The hydroxypropyl methylcellulose HPMC product for exterior wall insulation plastering mortar is made of highly pure cotton cellulose as the raw material, which is prepared by special etherification under alkaline conditions.The entire process is completed under automated monitoring and does not contain any animals. Active ingredients such as organs and oils. It is widely used to improve the performance of hydraulic construction materials, such as cement and gypsum. In cement-based mortar, it can improve water retention, extend correction time and opening time, and reduce sagging.
In the plastering mortar, the amount of hydroxypropyl methylcellulose added is very low, but it can significantly improve the performance of the plastering mortar, which is the main additive that affects the construction performance of the mortar. Reasonable selection of hydroxypropyl methylcellulose with different degrees of viscosity and additions has a positive effect on the improvement of the performance of dry powder mortar.
This article refers to JG ∕ T230-2007 “Ready-mixed mortar” mainly introduces the performance of hydroxypropyl methylcellulose HPMC used in plaster mortar, especially the slippery mortar, excellent work performance is the focus of this article.
In plastering mortar, hydroxypropyl methylcellulose HPMC plays a role in water retention, thickening, delaying cement hydration power, improving construction performance and so on.
Good water retention capacity makes cement hydration more completed, can improve the wet viscosity of wet mortar, improve the bonding strength of mortar, and can adjust the working time. In addition, spray mortar can improve its pumping performance due to the addition of hydroxypropyl methyl cellulose HPMC, so hydroxypropyl methyl cellulose HPMC will be widely promoted as a mortar additive.
Appropriate amount of moisture stays in the mortar to make the cement have longer time to hydrate.
The water retention is proportional to the viscosity of the cellulose ether solution in the mortar.
The higher the viscosity, the better the water retention. Once the water molecules increase, the water retention decreases.
Because for the same amount of hydroxypropyl methylcellulose HPMC solution for building, the increase of water means the decrease of viscosity.
Increased water retention will lead to longer curing time of the mortar being applied.
2. HPMC Thickening is mainly used as a thickener in the interface agent.
It can improve the tensile strength and flexural strength, improve surface coating, enhance adhesion, and increase the viscosity strength of mortar.
Good permeability improve the uniformity of the interface. Enhancing the lubricity and fluidity of the mortar make it easier to apply and improve work efficiency.
3. The application of hydroxypropyl methylcellulose HPMC can improve the construction of mortar.
Tile adhesive can be used as a water retention agent and adhesive in the bonding of tiles, which can greatly improve the construction performance of the adhesive and allow It has a longer opening time and stronger adhesive force to prevent the tiles from falling off too quickly.
It has improved workability, good water retention, enhanced adhesion, and high sag resistance.
The efficiency of sticking bricks is improved, the efficiency of tiling is improved, and the bonding strength and shear strength are improved.
4.Lubricating ability .
All air-entraining agents have the effect of wetting agents.
Because of their reduced surface tension, they help the fine powders in the mortar to disperse when mixed with water.
5. Anti-sagging mortar means that there is no danger of sag or downward flow when constructing in thick layers.
Sag resistance can be improved by plastering mortar with hydroxypropyl methylcellulose HPMC.
Especially the newly developed hydroxypropyl methylcellulose HPMC for plastering mortar can provide better sag resistance of mortar