Hello sir. I believe 554kg cement will give strength of more than m45.. Whencastes at site and tested on UTM.. Cement content between 380 to420 more than sufficient practically..
sir, you did not indicate where you got the 0.54! I believe it is due to the void ratio. Since Cement, Sand & Gravel have different void ratio & proportion 0.54 can not apply as a fix factor. Just my opinion!
Using 1.54 here and another video u re using 1.57....thou thats not a problm .the problm is how do you know the number of truck of sand or granite to get.