Views: 17 Author: Site Editor Publish Time: 2025-06-02 Origin: Site
Select the appropriate HPMC: We recommend HPMC with a medium viscosity (40,000-100,000 mPa·s) to balance water retention and fluidity.
Select low-air-entrained HPMC to minimize strength loss caused by air bubbles.
Adjust aggregate gradation: Use sand with a fineness modulus of 2.0-2.5 to reduce porosity and increase density.
Use low-shrinkage cement or admixtures: Use sulphoaluminate cement or add gypsum or fly ash to reduce shrinkage.
Substrate Preparation: Clean loose dust and oil stains, apply a specialized primer (such as epoxy or acrylic) to seal the base layer for moisture absorption.
Check the base layer's strength and repair any hollow areas before proceeding.
Environmental Control: The recommended construction temperature is 10-30°C, with a humidity >50%. Avoid strong winds.
If necessary, cover with plastic sheeting to slow evaporation.
Appropriate Construction Thickness: A single layer should be 5-10mm thick. If the thickness is too thick, apply in layers.
Control the water-cement ratio: Strictly follow the manufacturer's recommended water usage and avoid adding water arbitrarily.
Add anti-cracking ingredients: Add 0.1%-0.3% polypropylene fiber (PP fiber) to increase tensile strength.
Use a shrinkage-reducing agent (SRA) or an expansion agent (such as UEA) to compensate for shrinkage.
Enhance curing: Avoid walking on the surface for 24 hours after application. Use wet curing or seal the surface with a curing agent.
Low-viscosity HPMC (20,000 mPa·s) caused poor water retention.
Hot weather (35°C) accelerated water evaporation.
No primer was used, so the substrate absorbed too much water.
Switched to 80,000 mPa·s HPMC for better water retention.
Added 0.2% PP fibers.
Applied acrylic primer and covered with a curing film post-application.
