Concrete grade

Concrete type

Cost (yuan/m³)

Spread (yuan/m³)

Sand saving cost

Increased cost of water reducer

C30

Ordinary pumping class

(226.5 × 20)/1000 = 4.53

335 × 2 × 0.2% = 1.34

3.19

C20

Ordinary pumping class

(238.5 × 20)/1000 = 4.77

275 × 2 × 0.15% = 0.83

3.94

C25

Ordinary pumping class

(232.5 × 20)/1000 = 4.65

305 × 2 × 0.15% = 0.92

3.73

C30

Low slump non-pumping class

(375 × 20)/1000 = 7.5

310 × 2 × 0.1% = 0.62

6.88

C30

Ordinary pavement

(340 × 20)/1000 = 6.8

310 × 2 × 0.1% = 0.62

6.18