Concrete block also known as a concrete masonry unit and sometimes called a cinder block typically has one or two holes or voids to reduce the weight of the block.
How much concrete to core fill a block wall.
Given that your measurements are 2 x2 x4 the block contains about 16 cubic feet.
When reinforced with steel and filled with concrete a rock solid wall can be built to withstand the elements.
Whenever you are working with cinder block you can strengthen them significantly by filling them with concrete.
The hollow core of each concrete block keeps it from weighing too much to work with and provides a cavity that can be filled with concrete for added strength.
Cinder blocks are less expensive to work with than poured concrete in home construction projects but they are not as strong you can make up the difference by spending a little more to reinforce the blocks a project that is still less expensive than using just poured concrete.
How much concrete does it take to fill a 10 inch.
Contractors elect to fill the hollow openings or voids in concrete blocks sometimes referred to as grouting after they are stacked or laid to achieve a stronger wall one with properties nearly identical to a poured concrete wall.
For smaller projects and those poured by hand some type of funnel.
16 cubic feet of concrete at 150 s is about 2400 s per block.
Note that this is an estimate.