Improve water retention: HPMC can significantly improve the water retention of mortar. A lower dosage of HPMC can significantly improve the water retention of mortar. For example, when the dosage is 0.02%, the water retention rate increases from 83% to 88%; when the dosage is 0.2%, the water retention rate reaches 97%. Good water retention performance ensures sufficient hydration of cement and improves the strength and durability of mortar.
Improved workability: HPMC can make the mortar show better fluidity under low shear force, making it easy to apply and level; while under high shear force, the mortar shows higher viscosity, preventing sagging and flowing. . This unique thixotropy makes the mortar smoother during construction, reducing construction difficulty and labor intensity.
Improve crack resistance: By increasing the elastic modulus and toughness of mortar, HPMC can effectively reduce the occurrence of cracks, improve the crack resistance of mortar, and extend its service life.
Increased flexural strength: HPMC increases the flexural strength of mortar by strengthening the matrix and improving the bonding between particles. This will increase resistance to external pressures and ensure the structural stability of the building.
Enhanced bond strength: HPMC forms a thin film around the particles, improving the interaction between the mortar and the substrate. This enhanced adhesion ensures a strong bond, reducing the risk of delamination or failure.
Improved durability: The addition of HPMC can produce lighter materials, with a weight reduction of 11.76%. This high void ratio helps with thermal insulation, reducing the material’s electrical conductivity by up to 30% while maintaining a fixed heat flux of approximately 49W when subjected to the same heat flux. The resistance to heat transfer through the panel varied with the amount of HPMC added, with the highest incorporation of the additive resulting in a 32.6% increase in thermal resistance compared to the reference mixture.
Reduce Shrinkage and Cracking: Shrinkage and cracking are common challenges in mortar applications, resulting in compromised durability. HPMC forms a flexible matrix within the mortar, reducing internal stresses and minimizing the occurrence of shrinkage cracks.
Improved water resistance and impermeability: In drywall and caulk, HPMC enhances water resistance and impermeability, maintaining stability in humid environments and extending the life of the material.
Improve freeze-thaw resistance: Due to its excellent water retention and crack resistance, HPMC can maintain stable performance in extreme environments, ensuring the construction quality and durability of mortar.
Improve tensile bonding strength: HPMC can also significantly increase the pressure-shear bonding strength of mortar. Adding 0.2% HPMC can increase the bonding strength of mortar from 0.72MPa to 1.16MPa.
HPMC has a significant effect in improving the durability of mortar. It can improve the water retention of mortar, improve workability, improve crack resistance, enhance bonding strength, improve durability, reduce shrinkage and cracks, and improve water resistance and impermeability. properties, improve freeze-thaw resistance and improve tensile bonding strength. These properties make HPMC an important additive for improving the durability of mortar.