LECA anniversary

Description

LECA (Lightweight Expanded Clay Aggregate) is an aggregate made of expanded clay at average  ***0 C° in rotary kiln, the Yielding gases are expanded by thousands of small bubbles as long as this temperature and those will be provide many voids and honeycombs at these round shape aggregates when melted materials become cold.
 
The clays and shales expanded were developed about ***7 in Kansas City, Missouri, to the production in a rotary kin of a patented expanded aggregate known as Haydite which was used in the construction of USS Selma, an ocean-going ship launched in ***9 year. There following in the USA the development of a series of aggregates known as Gravelite, Perlite, Rocklite and etc. In Europe, LECA commenced in Denmark, Germany, Holland (Netherlands) and the UK. 
Our factory establish at ***0 and it still the only manufacturer in Middle East that export to many counties and able to built factory which is did many time.
 
The manufactured aggregates are produce in various sizes; Four usual grades are    (**4) mm, (***0) mm, (****5) mm and mix grade ***5 mm which has **0 kg/m3  max density, LECA boulder is a the bigger size of LECA with ******0 mm size and **0 kg/m3 density.
 
Some of the important advantages of LECA aggregate are: lightness, thermal insulation by low conductivity coefficient, soundproofing by high acoustic resistance, moisture impermeable, incompressible under permanent pressure and gravity loads, non–decomposition against severe condition, fire resistant, Ph of nearly 7, freezing and melting resistance, easy movement and transportation, lightweight backfill and finishing, reduction of construction dead load and earthquake lateral load,   perfect sweet soil for plants, best material for drainage and filtration.