Experimental verification of the effect of HPMC on mortar performance

It has been confirmed by multiple authoritative experiments that HPMC significantly optimizes the overall performance of mortar by improving its microstructure. The following are key experimental conclusions and engineering guidance:

I. Thermal performance improvement experiment

◆ Lightweight breakthrough: Adding 0.06% HPMC, the material bulk density is reduced by 11.76%, and the thermal conductivity is reduced by 30%

◆ Thermal resistance enhancement: The thermal resistance is increased by 32.6% at the highest addition, and the thermal insulation performance is comparable to professional insulation materials

◆ Energy saving verification: Under the same heat flux (49W), energy consumption is reduced by about 1/3

II. Construction performance optimization experiment

▼ Water retention revolution: 0.4% addition achieves 100% water retention rate (Figure 1), and cement hydration efficiency is increased by 40%

▼ Anti-sagging breakthrough: The vertical surface construction thickness increases by 50% without collapse (ASTM C230 standard)

◆ Intelligent fluidity: 0.025%-0.05% golden ratio, realizing the characteristics of "smoothing and smoothing, and setting when standing"

III. Strength balance system

✓ Bonding strength: jumped from 0.72MPa to 1.16MPa (+61%), reaching the C2 grade tile adhesive standard

✎ Strength control: For every 0.1% increase in HPMC, the compressive strength decreases by about 8%, and aggregate optimization is required

◆ Anti-crack breakthrough: The plastic cracking index is reduced by 75%, and the self-repair rate of micro cracks is increased by 60%

IV. Special scene verification

■ Extreme climate: The strength retention rate is increased by 45% after -20℃ freeze-thaw cycle

■ Ceramic molding: When 25% HPMC is added, the green body strength reaches a peak of 7.5MPa

■ Recycled building materials: The flexural strength of cement-based recycled materials is increased by 22%

Golden rule for engineering application

√ Addition amount control: 0.02%-0.2% is the efficiency range, and exceeding 0.6% will cause a sharp drop in strength

√ Viscosity selection: 40,000 mPa·s is the water retention threshold, and there is no gain in higher viscosity

√ Construction adaptation: Low viscosity is preferred for thin layer construction, and high water retention models are suitable for thick layer pouring

Experimental conclusions show that HPMC is like a "performance regulator" for mortar. Through precise proportioning (recommended within 0.4%), it can achieve a 30%-60% performance leap in core indicators such as water retention, construction, and bonding. Engineers should find the best balance point in the triangle relationship of "water retention-strength-constructibility" based on the strength requirements, construction conditions, and environmental factors of specific scenarios.