The type of sand is also important. The right ratio for a mixture of cement and sand is 1:5 to 1:6
Cement send of ratio 1:5 for brick work
Sand and gravel together
what is ratio of rcc work machine foundation
six to one.
1 to 4
My research has found the ratio Cement:Hydrated lime:washed sand = 1:1:6
7 Parts sand to 1 Part portland cement
It depends on what you are mixing for. The ratio would vary for specific applications.
1:5 (cement:sand) is the best ratio
Well, if you have a ratio of cement, water and sand that is about 1:1:2, it can make it stronger. However, add any more sand to that, and the concrete can become brittle, making it weak and easy to break.
Shear strength of fine sand is determined by the angularity of the sand particles, the grading of the sand. These two features governs the critical state shear strength parameters of the sand. Density, however, dictates the peak shear strength of the sand. i.e. the denser the sand, the higher the peak shear strength. But the critical shear strength remain the same. The denser the sand, the lower the void ratio. Shear strength of fine sand is determined by the angularity of the sand particles, the grading of the sand. These two features governs the critical state shear strength parameters of the sand. Density, however, dictates the peak shear strength of the sand. i.e. the denser the sand, the higher the peak shear strength. But the critical shear strength remain the same. The denser the sand, the lower the void ratio.