Using 52.
5 grade ordinary Portland cement with a specific surface area of 3148m2/kg; 5mm to 25mm continuous graded crushed stone, with an apparent density of 2660kg/m3 and a fineness modulus of 2.
8 for ordinary river sand, with an apparent density of 2640kg/m3; Ordinary tap water; High performance polycarboxylate superplasticizer ME-1, with a water reduction rate of 25% and a solid content of 27%.
The dosage is adjusted according to the state of the concrete, so that the slump of the concrete is between 140mm and 160mm.
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