How many Sand bags required for 30 square meter sand hollow blocks?

The number of sandbags required for 30 square meters of sand hollow blocks depends on the thickness of the walls and the specific dimensions of the blocks. Typically, a standard sandbag weighs about 15-20 kg and contains around 0.03 cubic meters of sand. To determine the exact number of bags needed, calculate the volume of sand required based on the wall thickness and block dimensions, then divide that volume by the volume contained in one sandbag.