Production, General Physical Properties & Shipping
Fired Buildex Leaving Kiln
- Buildex is produced by quarrying shale and introducing it
into a rotary kiln, where the shale is gradually heated in about one hour to 20000F. During the process the shale expands, becomes less dense, and
is vitrified, just as clay is vitrified into pottery. All organic compounds are burned off
in the process. The resulting Buildex particles contain numerous microscopic non-connected
air voids, making the product lightweight, strong, and durable. Since it is processed at
high temperatures, Buildex is fire resistant and thermally stable.
aggregate particles leaving the kiln are rounded to cubical in shape, with particle size
from 2 inches (50 mm) down to fines. They are then screened into production sizes, and
some larger fractions are crushed into finer fractions. The fractions smaller than 1/4
inch contain some of the angular particles from the crushing process.
Compared to common normal weight aggregates,
Produced at temperatures in excess of 10000C,
ESCS aggregate offers more than twice the volume for the same weight of conventional
- Light. Over 50% lighter than normal weight aggregate, due to the internal air
- Strong. Despite being lighter, the aggregate still produces about the same
strength as normal weight rock in concrete. Buildex is "strong like a
submarine," because of its strong vitrified shale composition, the same material that
brick is made from.
- Durable. The vitrification process fuses all the minerals in Buildex together,
forming a solid that is stable and will last indefinitely.
- Insulating. The air voids that make Buildex light also increase its insulation
factor over 1000% compared to normal weight rock.
- Fire Resistive and Thermally Stable. Buildex is physically stable from below
freezing to service temperatures approaching 20000 F. Many normal weight
aggregates are not, and undergo chemical or crystalline changes as they are heated,
causing instability and in some cases failures.
Typical Physical Properties of Buildex compared to Rock & Sand (a)
Primary Chemical Component
|Loose Density, lb/cu ft
|Specific Gravity, bulk
|Conductivity (k-factor) (b)
(a) the density and specific gravity vary with
production plant; refer to the information on a particular Buildex plant for details.
(b) Btu/hrft2 (deg F/in).
Most of our production is shipped in truckload quantities of 30
cubic yards or more. We also have rail and barge shipment available.
Uses and Guide Specifications |
Production, General Physical Properties & Shipping | New
Market MO Plant: Aggregate Physical Properties | Marquette
KS Plant: Aggregate Physical Properties | About Buildex
| Projects | History | Pricing and Request Form
P.O. Box 77
Ottawa, Kansas 66067-0077
This site was designed and developed by InterPRO Resources, Inc.
Copyright Buildex, Inc. 1996-1998 All Rights Reserved
Buildex, Haydite and Car-Go are Registered Trademarks of Buildex, Inc., Ottawa, Kansas.