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Introduction To Light Weight Concrete
Lightweight concrete is mainly used as back-filling material. When talking about lightweight concrete, we refer to a concrete of which its specific gravity (density) is much more lower than normal concrete. Basically normal concrete: 2.35 – 2.42 ton/m3 while lightweight concrete 0.80-1.40 t/m3.
Therefore final strength is not issue. Expected final strength would be usually lower 5 MPa at 28 day as such concrete contained of lot of air entrained. The strength would be affected by type of lightweight aggregate to used.
Production Principle
Basically there are 2 ways to produce light weight concrete.
1) Cement/ Water/ Sand / Lightweight aggregate/ Chemical additives (admixtures)
2) Cement/ Water/ Sand / Chemical additives
By lightweight aggregate we can consider polystyrene balls, expanded clay for instance. Chemical additives, we mainly means special air entrained agent such as Sika Lightcrete 1-500VP. This admixture ca entrained safely up to 30% of air entrained into the mix.
As per the use of the special air entrained, usually, the mix is batched for a designed volume the air entrained is measured in order to determine final volume of the concrete batched. Indeed in term of concrete production it is important to know about about which volume we are talking.
Challenge
The main challenge of the new technological solution is to shorten the time of connecting the concrete mass and improved thermal characteristics and strength
Solution
Finds presents new in the production of lightweight concrete and making factory elements for the construction industry for construction of wall structures and business facilities .This solution allows you to mix be built in different molds allowing most ready to factory withdrawn from the patterns for a minimum of one hour to four hours depending on the geometry of the material has factory element.
The volume mass in dry condition 600-800 kg / 1m3, Thermal conductivity 0.09 W / mk, Vedralit external walls (e =20 cm) does not require additional knowledge the mainstream because thermal insulation themselves an excellent thermal insulator little weight to the elements directly vedralit affect weight of the structure, and thus the dimensions of the supportive items and quantities of reinforcement. Due to the small-mass of the object increases seismic characteristics of the object.
Low weight allows easy manipulation of the elements, vertical and horizontal light transport it will increase the speed of construction, shortens the time of construction of buildings reduces the number of people engaged in building
Existing Application & Potential
New technological solution to the production of lightweight concrete on the basis of perlite can be manufactured as a mixture of production Hot factory as elements of external and internal walls, as elements and tiles, ventilation ducts and chimneys as well as mixture for casting floor ceiling tiles and wall paintings of buildings. In depending on the needs of developers.
