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PERLIMIX is a light weight Perlite based aggregate which when combined with portland cement and water, produces an ultra light weight concrete that is used for insulating roof decks and lightweight floor fills, insulating structural rock decks, curtain wall systems and for a variety of permanent insulating applications. WHY PERLIMIX? World over building consumes 40% of total energy generated and they are major contributors to the carbon emissions. In order to reduce carbon emission, the concept of construction of green buildings and use of green building materials is gaining momentum in our country. In India, our construction practices involve reinforced cement concrete as the roofing element which is noted for its high thermal conductivity. Therefore, proper treatment of the roof structure plays an important role in providing comfort levels and reducing cooling loads inside the building. Use of thermal insulation in roofs significantly cuts down the heat gains through reduced conduction. Thermal insulation plays an important role and reducing the U value for the roof section. The function of roof insulation is to insulate the building against heat in flow from outside during the day. Further, the upper roof surface is exposed for the longest duration directly to almost intense perpendicular solar heat radiation. The heat accumulated on the roofing material is transmitted gradually and ultimately radiates the heat in the room living/working space, thereby increasing the inner warmth. Especially in cities like Ahmedabad, Jaipur, Delhi, this phenomenon occurs even after sunset which is very commonly experienced and so the heat keeps transmitting till late in the evening giving a prolong effect. PERLIMIX provides an insulating sheath which intercepts and combats the solar heat radiation and thus retards the heat from entering the slab. Conventional methods of curbing heat are by fans, air coolers or air-conditioners which are the recurring energy consuming methods. By incorporating a good insulating material like Perlimix the heat transmission is reduced by about 30%, thereby leading to permanent electrical energy savings. In order to ensure permanent savings in energy, even ECBC CODE also has recommend the use of insulating material like Perlite for roof insulation. PERLIMIX is a very unique insulating material especially when studied in comparison with other conventional insulating materials e.g. Vermiculite, EPS, PUF etc. All the insulating materials are either used for cold (cryogenic) or hot (thermal), whereas Perlite is the only insulating material which is used for both cold as well as hot insulation.
BENEFITS OF ROOF INSULATION:- Benefits of roof insulation are manifold.
MIXING PROCEDURE: All concrete should be mechanically mixed in Cement / Perlimix ratio (as indicated in table below) to produce a uniform distribution of the materials with a suitable consistency and the required as-cast unit weight. Excessive mixing should be avoided because of the possibility of changes in unit weight and consistency. MATERIAL PER CUBIC METER BASED ON 100 % YIELD
NOTE : Loose Bulk Density of PERLIMIX is 90 – 110 Kg/m3 Ideally a 3 to 4 inch or 75mm to 100 mm thickness of PERLIMIX insulation is recommended internationally.
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