Shire Green Roof Substrates Ltd

Shire Crushed Recycled Aircrete

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Substrate Description

Lightweight crushed aggregate made from recycled aircrete blocks.

Substrate Application

General purpose green roof growing media and insulating aggregate.

Technical Information (Typical)
 
Size: Sieve Size (mm) % passing Shire minerals aircrete substrate for green roofs from recyclable building materials 
12 87
5 >5
 
pH value: 9.4
Thermal conductivity: The apparent thermal conductivity of crushed aircrete measured dry is 0.098 w/mk [gross bulk density 404 kg/m³]
Data provided by H+H UK Limited
From the above data, for an average bulk density of 496 kg/m3 the anticipated apparent thermal conductivity is circa 0.12 W/mK
 
Key Properties:
Aggregate type
for Comparison		 Porosity Loose Bulk Density (Kg/M3) 100mm weight (kg) per m2
Dry Wet Dry Wet
Recycled aircrete 5-12mm 63% 496 807 50 81
Clay pellets 5-10mm 27% 816 1040 82 104
Gravel 5-10mm 0% 1532 1568 153 157
Packaging: Supplied tipper, in single trip 1 m3 Big bags or 25kg sacks

The above information is issued in good faith and without warranty and is intended as a guide only. The information comprises typical data and does not constitute a specification. Specification values are available separately upon request.

The Manufacturing Process

Demolition of old buildings generates large quantities of recyclable building materials and the part which is made from used aircrete blocks are sorted and crushed  to create this lightweight insulating aggregate.  The blocks are of a range of density and compressive strength from circa 2.5MPa to 7Mpa.

It is inevitable that some other building materials will also make its way into this product and this can include small amounts of brick, roof tile, masonry and glass.

This mixture does not contain organics but the high water holding value sustains plant growth when used in green roof applications.