There are several sizes, however the one most commonly referred to is the large, rectangular block with two holes - usually used for building foundations. This type of block measures 8" x 8" x 16" and weighs approximately 29 pounds.
8 by 8 by 16 inches is the nominal size, but 7 5/8 by 7 5/8 by 15 5/8 inches actual size. It's 3/8 of an inch smaller to all room for the mortar that goes between the blocks.
A standard 8x8x16 2 core block contains about .25cf of open space
There are 10 concrete block per m2.
The dry weight of a medium density concrete block (215 x 450 x 100mm thick) is approximately 7.5Kg --- There are many different sizes, shapes and mixes used to make concrete block. Additionally the weight varies if the unit is wet or not since they absorb water. I see varying weights of 35 to 55 pounds for 8x8x16 block.
A concrete block is made from concrete, a brick block is made from brick. They are two different building materials. Both have their respective advantages and disadvantages.
A concrete block is normally 8 inches high so that an 18 concrete block wall is 12 feet high.
The standard concrete building block for load-bearing walls is 8 x 8 x 16
8"X16"
Without the size opf the block, if is not possible tell the weight,
In America: 8x8x16 inches, This is the standard CMU: Concrete Masonry Unit There also the half blocks 8x8x8. Source: http://concreteblocksizes.blogspot.com/
It weighs 59 lbs. There is a difference between a "real" cinder block and a concrete block. A cinder block uses cinders--ash from the burning of coal--as its aggregate. Concrete blocks are made from concrete. Concrete block is far stronger than is cinder block, and some jurisdictions prohibit the use of cinder block. The only justification for cinder block is that it weighs less than concrete block, which is important if the ground you're building on isn't strong enough to support a heavy structure. This justification has gone away, because now you can buy concrete block made from expanded-shale aggregate that's as light as cinder block and as strong as standard-weight concrete masonry.
A standard 8x8x16 2 core block contains about .25cf of open space
The answer will depend on the size of the concrete block!
Concrete block.
The answer depends on how much of the block is hollow.
That depends on what sort of block you mean, but there is no standard size for any sort of "block". City blocks are not a standard size and neither are cinderblocks or building blocks. You'd have to be more specific for a numerical answer.
Basic concrete block it 8x8x16 inches.
There are 10 concrete block per m2.