How many cement bags needed to lain 3500 blocks?

To determine the number of cement bags needed for laying 3,500 blocks, you first need to know the mortar mix ratio and the volume of mortar required per block. On average, about 0.5 to 0.75 bags of cement are needed for every 100 blocks, depending on the mortar thickness and mix used. Therefore, for 3,500 blocks, you would need approximately 17.5 to 26.25 bags of cement. Always consider local building codes and specific project requirements for more precise calculations.