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BEAM PLUS FOR NEW B UILDINGS MATERIALS ASPECTS (M A)
V ERSION 1.2 MA 7 RECYCLED MATERIALS
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 82
acceptance are that they can perform their intended functions throughout
the design life without being deleterious on the environment or
associated constructional features.
There are many opportunities for using recycled materials in structural
and non-structural elements of a building and the surrounding site works.
For large sections, high strengths, where shrinkage and cracking are
critical, where resistance to sulphate attack is required, and where
surface finish is particularly important, PFA concrete should be specified.
Crushed concrete aggregate complying with the quality and grading
requirements of British Standard BS 882 [1] or similar for use in concrete
for foundations. The fills in foundations and for over-site use of recycled
materials should comply with the requirements of BS 6543 [2] or similar
specification.
A list of Recycled Construction Products is available from the
Environmental Protection Department [ 3 ]. Works Branch Technical
Circular 14/90 [4] and 14/90 Addendum 1 [5] discusses the quantities of
PFA that can be used. PNAP No. APP-33 [6] sets out the conditions in
which the use of PFA as a partial cement replacement in concrete is
permitted. PNAP No. APP-129 [7] sets out the technical guidelines for
using recycled aggregates in prescribed mix concrete of specified grade
strength of 20P and designed mix concrete of specified grade strengths
of 25D to 35D.
Materials which normally consist of recycled content will not be
considered for this credit, for instance, steel and glass.
1 British Standards Institution. Specification for aggregates from natural sources for concrete. British Standard BS 882:1992.
2 British Standards Institution. Guide to use of industrial by-products and waste materials in building and civil engineering.
British Standard BS 6543: 1985.
3 Environmental Protection Department.
4 Works Branch Technical Circular No. 14/90. The Use of PFA in Structural Concrete.
5 Works Branch Technical Circular No. 14/90 Addendum 1 to LWB PN4.
6 Buildings Department. Practice Note for Authorized Persons, Registered Structural Engineers and Registered
Geotechnical Engineer, PNAP No. APP-33 Pulverized Fuel Ash in Concrete.
7 Buildings Department. Practice Note for Authorized Persons, Registered Structural Engineers and Registered
Geotechnical Engineer, PNAP No. APP-129 Use of Recycled Aggregates in Concrete.