Each cubic meter of plain concrete weighs 22-24KN;; ; Reinforced concrete weighs 24-25KN (related to vibration and weak tamping);
The weight of sand per cubic meter is 12.2-20KN (related to water content and thickness, the wetter it is, the heavier it becomes);
The weight per cubic meter of crushed stone is 14- 15KN (related to the particle gradation of crushed stone, with good gradation being heavy and poor gradation being light).
1KN is approximately equal to 100Kg.