ESCS ProductESCS Test Tubes

   Expanded shale, clay and slate (ESCS) is a unique
   lightweight aggregate prepared by expanding
   select minerals in a rotary kiln at temperatures
   over 1000° C. The production and raw material
   selection processes are strictly controlled to
   insure a uniform, high quality 
product that is 
   structurally strong, stable, 
durable and inert,
   yet also 
lightweight and insulative. ESCS lightweight 
aggregate gives designers greater flexibility in creating
   solutions to meet the challenges of dead load, energy
budgets, terrain, seismic conditions, construction 
   schedules and budgets in today’s marketplace.

The unique properties of ESCS, ceramic 
   lightweight aggregate provides time-tested
sustainable performance. This material offers
and environmental engineering 
solutions in structural concrete, geotechnical,
concrete masonry, and other applications.


Basic History of ESCS and ESCSI 

                                                                                              Rotary Kiln                           
   For nearly a century Expanded Shale, Expanded Clay and 
   Expanded Slate has been used successfully around the world in 
   more than 50 different types of applications. The most notable  
   among these are SmartWall lightweight concrete masonry units,
   high-rise buildings, concrete bridge decks, high performance  
   marine platforms, asphalt bituminous surface treatments,  
   lightweight chip seal, soil conditioner and lightweight 
   geotechnical fills.
   Expanded shale, clay and slate structural lightweight aggregate,
SLA, as manufactured by the rotary kiln process was originally
   developed in 1908 and patented in 1918 as Haydite®. Today, SLA
   is available throughout the world.

   ESCS ceramic lightweight aggregate improves concrete in several ways. The most notable are weight reduction and the ability to design with specified density concrete. ESCS also provides moisture for internal curing which improves the quality of concrete.

ESCSI is the international trade association for manufacturers of rotary kiln-produced expand­ed shale, expanded clay and expanded slate lightweight aggregate. ESCSI promotes the exten­sive use of rotary kiln-produced lightweight aggregate in the lightweight concrete masonry and structural lightweight concrete markets, as well as use in asphalt, geotechnical and other appli­cations. Based on research and development, educational material is disseminated to all phas­es of the building industry. The association works closely with other technical organizations, ACI, ASTM, etc. to maintain product quality, life-safety and professional integrity throughout the construction industry and related building code bodies.

General Information on ESCS

7600 ESCS Applications and Uses 7600 ESCS Applications and Uses (Jan 2006)
Gives a general overview of the many uses for ESCS.
“A World of Applications…Worldwide”
7600.1 LWC 7600.1 Lightweight Concrete ●History●Applications●Economics (Nov 1971)
Gives an excellent overview and history of the Lightweight Aggregate Industry. 43 pages.
7700 Structural LWA Holistic Contribution 7700 Structural Lightweight Aggregates’ Holistic Contribution to Sustainable Development
ESCSI commitment to Sustainable Development and How SLC fits into the LEED
Green Building Rating System. (June 2004)
7700.1 A Holistic Approach 7700.1 A Holistic Approach to Sustainability For the Concrete Community
( J.P. Ries and T.A. Holm) (Mar 2004)
9340 Moisture Dynamics in LWA 9340 Moisture Dynamics in Lightweight Aggregate and Concrete
(T.A. Holm, O.S. Ooi, T.W. Bremner) (Feb 2004)
9602.0 Structural LWAC 9602.0 Structural Lightweight Aggregate and Concrete
(J.P. Ries, P.E.) (June 2008)
HPC Bridge Views 9603.0 HPC Bridge Views, Iss.11 (Sept/Oct 2000)