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ASTM Standard aids selection of aggregate for green roof systems.

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July 18, 2012 - ASTM E2788, Specification for Use of Expanded Shale, Clay, and Slate (ESCS) as a Mineral Component in the Growing Media and Drainage Layer for Vegetative (Green) Roof Systems, was developed by Subcommittee E60.01. According to E60.01 member Chuck Friedrich, ASTM International standard provides typical gradations as well as physical and chemical properties of rotary kiln expanded lightweight aggregates that can be used as lightweight fill, drainage material, or growing media component.

ASTM Sustainability Committee Develops Standard for Use of Expanded Shale, Clay and Slate in Vegetative Roofing Systems


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ASTM International
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Press release date: July 16, 2012

W. CONSHOHOCKEN, Pa.-A new ASTM International standard will aid in the selection of lightweight aggregate best suited for use in the design and construction of vegetative roof systems. ASTM E2788, Specification for Use of Expanded Shale, Clay and Slate (ESCS) as a Mineral Component in the Growing Media and Drainage Layer for Vegetative (Green) Roof Systems, was developed by Subcommittee E60.01 on Buildings and Construction, part of ASTM International Committee E60 on Sustainability.

Specifiers, blenders and users of lightweight growing media for green roof applications will be the primary users of ASTM E2788.

According to Chuck Friedrich, an E60.01 member, ASTM E2788 provides typical gradations, physical and chemical properties of the rotary kiln expanded lightweight aggregates that can be used as a lightweight fill, drainage material or as growing media component for green roofs.

"ASTM E2788 can be used to select the size and type of lightweight aggregate best suited for a project," says Friedrich, of the Carolina Stalite Co. "The selection will be determined by local availability, but the new standard gives a broad scope of the properties that will allow most ESCS products in each region to meet the specification."

According to Friedrich, ESCS is regularly manufactured for use in the lightweight concrete industry but is also desirable for most green roof media because its availability, consistency and physical properties meet the requirements of most green roof media specifications. ESCS materials also contribute to good drainage, which has been determined to be the most crucial physical property needed for green roofs.

All interested parties are invited to join the ongoing standards developing activities of E60.01. Chief among its current projects is the development of a proposed new standard, ASTM WK25385, Guide for Vegetative (Green) Roof Systems, which will identify terminology, principles and fundamental concepts including those related to sustainability, technical requirements of construction, and types of vegetated green roof systems or green roofs used on buildings.

To purchase ASTM standards, visit www.astm.org and search by the standard designation, or contact ASTM Customer Relations (phone: 877-909-ASTM; sales@astm.org). ASTM International welcomes participation in the development of its standards. For more information on becoming an ASTM member, visit www.astm.org/JOIN.

ASTM International is one of the largest international standards development and delivery systems in the world. ASTM International meets the World Trade Organization (WTO) principles for the development of international standards: coherence, consensus, development dimension, effectiveness, impartiality, openness, relevance and transparency. ASTM standards are accepted and used in research and development, product testing, quality systems and commercial transactions.

For more news in this sector, visit www.astm.org/sn-environmental or follow us on Twitter @ASTMEnvironment.

ASTM Committee E60 Next Meeting: Oct. 23-25, 2012, October committee week, Atlanta, Ga. Technical Contact: Chuck R. Friedrich, Carolina Stalite Co., Salisbury, N.C., Phone: 704-637-1515; cfriedrich@stalite.com

ASTM Staff Contact: Stephen Mawn, Phone: 610-832-9726; smawn@astm.org ASTM PR Contact: Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org
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