​The golden rule of HPMC application in putty construction

The golden rule of HPMC application in putty construction

—— Improve the efficiency and quality of wall treatment

I. Model selection decision tree

✅ Viscosity selection guide

- 100,000 viscosity: quick-drying type (<2h open time), suitable for rush projects

- 150,000 viscosity: balanced type (3-4h), first choice for general use

- 200,000 viscosity: long-lasting type (>5h), suitable for high-end fine decoration

◆ Experimental data: For every 50,000 increase in viscosity, the bonding strength increases by 18%

II. Precise ratio control table

| Construction scene | Recommended addition amount | Synergistic combination |

|----------------|------------|-------------------|

| Interior wall scraping | 0.3%-0.5% | 0.1% starch ether |

| Exterior wall anti-cracking | 0.6%-0.8% | 0.2% latex powder |

| Old wall renovation | 0.4%-0.6% | 0.15% bentonite |

⚠️ Warning line: Exceeding 1.2% will cause the initial setting time to be extended by 2 times

Three, three-step intelligent preparation method

1. Pre-activation: Dissolve HPMC in 30℃ warm water (1:50 ratio) and let it stand for 15 minutes to form a transparent colloid

2. Gradient mixing: Add aggregate first and then glue, and control the stirring speed to 800-1200rpm

3. Maturation treatment: Let it stand for 20 minutes to fully stretch the molecular chain and increase the water retention rate by 30%

Four, environmental adaptation strategy