29 lb
The standard 6 by 8 by 16 cinder block weighs 28 pounds. They have a compression strength of 1900 psi.
There are many kinds of cinder block depending on what it's made for. They differ in many respects as to what exactly goes in the mix. -The average for the size you are enquiring about is 45 pounds, but specific types could be less or more.
Concrete weighs about 150#'s per cubic foot. Given that your measurements are 2'x2'x4', the block contains about 16 cubic feet. 16 cubic feet of concrete at 150#'s is about 2400#'s per block.
around twenty kgs
You have not provided the dimensions of the cinder blocks. 8 by 8 by 16 in what units of measurement?
8" x 16" Cinder block will weigh just under 30 lbs
The standard 6 by 8 by 16 cinder block weighs 28 pounds. They have a compression strength of 1900 psi.
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.
There are many kinds of cinder block depending on what it's made for. They differ in many respects as to what exactly goes in the mix. -The average for the size you are enquiring about is 45 pounds, but specific types could be less or more.
Standard block is basically 8" x 16" which is 128 square inches 128/144=0.8888888888888889. The size of the mortar joints will also have a bearing on the overall wall size.
Concrete weighs about 150#'s per cubic foot. Given that your measurements are 2'x2'x4', the block contains about 16 cubic feet. 16 cubic feet of concrete at 150#'s is about 2400#'s per block.
16
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around twenty kgs
Usually a pound of past will weigh in at 16 ounces... but sometimes it could weigh as much as .45 Kilo
16 lbs.
16 ounces (ozs) is a MEASURE of the weight of something. 16 ozs of lead will weigh exactly 16 ozs. 16 ozs of feathers will weigh exactly 16 ozs. Oh and by the way there are 16 ozs in a pound.