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J. Clarke[_4_]

In article om,
says...

On 06/23/2015 02:53 PM, J. Clarke wrote:

Ok, please explain how to identify "quality concrete block" and where
one obtains such in Hartford.

From:

http://www.waybuilder.net/free-ed/Courses/05%20Building%20and%20Contruction/050202%20Masonry/Masonry00.asp?iNum=02

"Blocks are considered heavyweight or lightweight, depending on the
aggregate used in their production. A hollow load-bearing concrete block
8-by-8-by-16-inches nominal size weighs from 40 to 50 pounds when made
with heavyweight aggregate, such as sand, gravel, crushed stone, or
air-cooled slag. The same size block weighs only 25 to 35 pounds when
made with coal cinders, expanded shale, clay, slag, volcanic cinders, or
pumice. The choice of blocks depends on both the availability and
requirements of the intended structure."

Thanks, that's actually useful. Now if I can find the bathroom scale
and find out what the ones I have weigh--they feel heavy compared to the
25 pound box of mortar mix though, so I suspect they're OK.