What Is the Significance of a Low Water-Cement Ratio in GRC Production? Qinglong GRC Water-Cement Ratio Control Technology Explained

The water-cement ratio is the most critical parameter affecting GRC performance. High-quality GRC has a water-cement ratio controlled between 0.30-0.35. This control reduces porosity to 12%-15%, increases flexural strength to 18-25MPa, and significantly improves durability. Through precise water-cement ratio control, Qinglong GRC achieves industry-leading product performance.

Regarding the influence mechanism of the water-cement ratio, when the water-cement ratio drops from 0.40 to 0.32, the capillary pore rate decreases from 20% to 12%, and the proportion of harmful pores (>50nm) decreases from 30% to 15%. This reduces the chloride ion diffusion coefficient by 50% and improves frost resistance by 100 cycles. In a key project, optimizing the water-cement ratio from 0.38 to 0.32 increased the 28-day strength of GRC components by 25% and reduced drying shrinkage by 30%, fully demonstrating the importance of a low water-cement ratio.

Effect on Mechanical Properties

For every 0.05 reduction in the water-cement ratio, compressive strength increases by 15%-20%; flexural strength increases by 10%-15%; elastic modulus increases by 8%-10%. These improvements are significant.

Improvement of Durability

Porosity decreases by 30%-40%; the chloride ion diffusion coefficient decreases by 50%-60%; the frost resistance grade improves by 1-2 levels. These improvements extend service life.

Requirements for Workability

High-efficiency water reducers (water reduction rate ≥25%) must be used; particle gradation should be optimized to improve flowability; these measures ensure construction performance.

Control Precision Requirements

Water-cement ratio fluctuation must not exceed ±0.02; automatic batching systems must be adopted; these controls ensure consistent quality.

Water-cement ratio control is key to GRC quality. Through precise control, Qinglong GRC ensures excellent product performance.