Insulating roofs with Perlcon GIB

Insulating- Countless tiny air cells in GIB aggregate produce concrete with an insulating value up to 20 times better than ordinary concrete. A 2-inch thickness of GIB concrete provides insulation equal to that of 1-inch top quality insulation hoard and is entirely inorganic—not subject to damage by water, vermin or fungus and doesn’t catch fire.

Workable -Versatile GIB concrete canbe job-mixed or transit mixed, and then poured, pumped or plastered into place. Its light weight simplifies handling, speeds construction and reduces cost of placement. The dry concrete can be nailed, sawed and worked with ordinary carpentry tools.

Specifications:<./strong>
• Recommendations: For lightweight insulating GIB concrete, the proper mix proportionsrequired for the compressive strength,thermal conductivity or other physical properties desired should be specified by mix design.For insulating roof fills and shortspan structural roof decks, use a 450-500 density GIB concrete. Use 500-600 Kg/m3 density GIB concrete for floor fills and short span lightweight floors.
• Materials: Cement shall be OPC 53 grade.Aggregate shall have a loose densityof 120-190 kg/m3. Air entraining admixture can be added if required. Water shall be clear and free fromoil, acid, alkali, organic matter or otherdeleterious substances, preferably potable.
• Mixing: GIB concrete shall be mixed in a paddletype plaster or a drum type concrete mixer. The required amounts of water, air entraining admixture and Portland cement shall be placed in the mixer and shall be mixed until slurryis formed. The proper quantity of GIB concrete aggregate shall then he added to the slurry and all materials mixed until desired wet density is reached.
• Placing: GIB concrete shall he carefullydeposited and screeded in a continuous operation until a panel or section is completed. Steel troweling shall be avoided. Rodding, tamping and vibrating shall not be used unless so specified by the architect.
• Curing: GIB concrete shall be protected forat least the first three days in accordance with good job practice to keep it from drying too rapidly or freezing. Freshly poured concrete shall be given adequate protection against damage by heavy rain. No traffic shall be allowed until concrete can sustain a man’s weight without indentation. For roof deck use, concrete shall cure at least 5 to 7 days after that waterproofing to be done of insulation concrete. This is far better than conventional brickbat coba layer normally used which is 5 times heavier than the concrete with GIB,has very high insulating values as compared to brick bat coba. n