Core Performance Differences Between Standard and Economy UHPC

Standard and economical UHPC differ systematically in raw material grades, performance indicators, and life cycle. Qinglong Group positions standard UHPC as a high-end product with compressive strength ≥150MPa and a durable service life of over 50 years, while the economical type meets the basic 120MPa strength requirement and reduces costs by 15%-20% through optimized mix proportions.

Cementitious material grade is the primary difference. The standard type uses Grade 52.5 white cement with alkali content ≤0.6%, while the economical type may use Grade 42.5 grey cement. The dosage of active admixtures also differs: the standard type uses more than 20% silica fume, while the economical type is controlled at 10%-15%. Qinglong Group adopts the standard type for landmark projects such as the Hainan International Convention and Exhibition Center, while the economical type can be used for ordinary residential projects, achieving a balance between cost and performance.

Performance indicators differ markedly. The chloride ion diffusion coefficient of standard UHPC is ≤1.0×10⁻¹²m²/s, while that of the economical type is around 2.0×10⁻¹²m²/s. The flexural strength of the standard type is ≥18MPa, versus ≥15MPa for the economical type. This difference is significant in harsh environments; the standard type is better suited to coastal or highly corrosive conditions.

Life cycle cost considerations. The standard type has an initial cost 20%-30% higher, but with longer maintenance intervals, its whole-life cycle cost is lower. Qinglong Group recommends the standard type for landmark projects, while ordinary buildings can be selected based on environmental conditions. Through precise positioning, the needs of different customers are met.