For the process, ordinary portland cement with density of 3.1 g / cm3, crushed stone with apparent density of 2.68 g / cm3 and medium sand with apparent density of 2.70 g / cm3 are used The concrete prepared in the laboratory is ordinary portland cement with density of 3.1 g / cm3, crushed stone with apparent density of 2.68 g / cm3 and medium sand with apparent density of 2.70 g / cm3. It is known that the water consumption of one cubic meter of concrete is 190 kg, the water cement ratio is 0.50, and the sand ratio is 33%?

For the process, ordinary portland cement with density of 3.1 g / cm3, crushed stone with apparent density of 2.68 g / cm3 and medium sand with apparent density of 2.70 g / cm3 are used The concrete prepared in the laboratory is ordinary portland cement with density of 3.1 g / cm3, crushed stone with apparent density of 2.68 g / cm3 and medium sand with apparent density of 2.70 g / cm3. It is known that the water consumption of one cubic meter of concrete is 190 kg, the water cement ratio is 0.50, and the sand ratio is 33%?

1) When w / C = 0.5, w = 190kg, C = 380kg can be obtained;
2) When the density is known, the volume method is used to calculate the mix proportion
Mc/ρc + Ms/ρs +MG/ρg +Mw/ρw =1
Substituting data: 380 / 3100 + S / 2700 + G / 2680 + 190 / 1000 = 1
S/(S+G)=0.33
The equation is s = 616 kg
G=1232 kg
The amount of sand is 616kg and the amount of gravel is 1232kg