contrast to the precise dimensions of the straight-edged precision
block, slump blocks are intentionally distorted during the
manufacturing process to simulate the appearance of old adobe
bricks. The rustic, rounded appearance of slump block is produced
by utilizing a wetter than normal mixture that is subjected
to an additional compression immediately upon ejection from
When specifying concrete masonry units, the dimensions are
indicated in the following manner: width x height x length.
Dimensions of slump blocks are usually expressed in terms
of their nominal size, which is one-half an inch greater than
their actual size. This half-inch difference accommodates
the standard 1/2 inch mortar joint that is utilized with precision
units. For example, a unit with the nominal dimensions of
8" x 6" x 16" would have actual dimensions
of 7 1/2" x 5 1/2" x 15 1/2".
Slump Block Accessory Units
The slump block manufactured by Air Vol Block, Inc. comply
with the requirements of ASTM C-90 and section 21-4 of the
Uniform Building Code. For more information regarding the
ASTM standards pertaining to concrete masonry units, please
call our office.
Air Vol Block has on-site testing facilities in which we can
test our products to ensure that they comply with the necessary
specifications. Additionally, we participate in a testing
program in which an independent laboratory randomly samples
and tests our concrete masonry units.
Air Vol Block stocks a wide variety of slump block sizes in
natural Gray and our tan slump color. Adobe colored slump
units are now considered to be a "special-order"
item. Please give us advance notice of projects requiring
the adobe color. A wide variety of other custom colors may
also be special ordered. Please contact your Air Vol Block
representative for more information regarding custom colors.
The raw materials utilized in the manufacture of concrete
masonry units are subject to natural variations in color which
affect the color of the finished product. It is important
that our customers understand that color can be guaranteed
only to a range of color. Even natural Gray units, which are
manufactured without pigments, may have noticeable shade variations
from run to run.
Slump blocks are readily available in 4" and 6"
heights. Available widths include 4", 6", 8",
12", and 16". Open-end units can be special ordered.
Many slump units can be special ordered as open-end units.
Please contact our Sales Department for more information.
Air Vol Block is constantly
adding new sizes and shapes to its product line. Please contact
our sales office about sizes and shapes not shown.
And for consistent quality
be sure to specify Mason Mix