Expanded Clay



Expanded clay is a lightweight aggregate manufactured from naturally occuring clay.  It is non-toxic, disease free, chemically inert and has a neutral pH. It  is used as a construction aggregate in lightweight concrete castings,  floors and panels and as a loose lightweight fill in geotechnical applications. It is  also used extensively in green roof systems as an additive to the  substrate and in hydroponic systems as a growing media.

Technical  Data Sheet

1. Product Name / Reference

Expanded Clay

2.  Main Intended Use

Construction aggregate, geotechnical fill, anti-slip additive, green roof substrate

3.  Chemical Description

Compound Element Chemical Formula Typical Content
Silicon Dioxide SiO2 60.60%
Aluminium Oxide Al203 18.30%
Ferric Oxide Fe203 8.54%
Magnesium Oxide MgO 3.83%
Potassium Oxide K2O 3.56%
Calcium Oxide CaO 2.18%
Titanium Dioxide TiO2 1.07%
Sodium Oxide Na2O 0.48%
Phosphorous Pentoxide P2O5 0.18%
Others   0.20%

4. Physical  Properties

a. Bulk Density 0.30 – 0.60 g/cm3
b. Melting Point 1000 oC
c. pH Value 7.0
d. Thermal Conductivity 0.113 w/mk
e. Specific Heat 1.25 – 1.35 Kj/KgK

5. Sizes  Available

Grade Size
Standard 4 – 10 mm
Medium 0 – 20 mm
Coarse 10 – 20 mm

6. Packaging

Packed in 100 litre sacks, 1000 litre IBC big bags or delivered loose in bulk

Water Filtration Yes
Odour Control No
Green Roof Systems Yes
Cosmetics Scrubs No
Dental Treatments No
PCB Scrubbing No
Glass Treatments No
Metal Finishing No
Lightweight Precast Concrete Yes
Odour Treatment No
Seawater Reverse Osmosis No
Automotive Polish No
Effluent Treatment No
Horticulture Yes
Construction Yes
Hand Cleaner No
Paints & Coatings No
Lightweight Plasters Yes

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