Leca

LECA is lightweight expanded clay (Lightweight Expanded Clay Aggregate) crated by heating marine clay to temperatures of 1150 degrees centigrate. Hence, these particles are essentially burnt clay with thousands of air-filled cavaties. LECA is a natural products. It has sues in the construction industry as an aggregate, insulation in flooring and roofing and for drainage.
LECA is an ideal horticultural aggregate since it has excellent ventilating properties. The cavities within the particles help retain water and prevent evaporation from the soil. It is chemically neutral, cleaner than soil and has pests of fungi.

Common uses of LECA in horticulture:

LANDSCAPING

Leca is the ideal medium to use when building green roofs and sports pitches as it creates a very light drainage medium. This can also be the case for urban landscaping.

HYDROPONICS

Hydroponics is probably the most intensive application in South Africa.
Bags Specifications: PARTICLE SIZE 8-20mm BULK DENSITY OF MATERIAL (4.2.1) γ= 320 Kg/m3 ± 15% CRUSHING RESISTANCE (4.10) σ >1,0 N/mm2 WATER ABSORPTION AT 24 HOURS (4.8) Cimb <25% PARTICLE SHAPE (4.5) Spherical REACTION TO FIRE (Decision 2000/605/CE) Class A1 (no contribution to a fire) – NOTE – The above data are indicative; based on our experience and tests. The user is advised to evaluate thatthe material is compliant with local requirements and is responsible for the end use of the material. Bag sizes: 50l