How many times Hesa Shuttering Plywood should be used for concrete?

HESA SHUTTERING PLYWOOD

The repetition actually depends on a couple of factors. Hesa Shuttering Ply is a highly densified ply with resin films on both sides of the surface to afford a smooth clean concrete finish in formwork.


Now, higher the density, the higher repetitions the ply can deliver without getting swollen or splitting due to water absorption. So Indian market has the following standard grades which are also the grades that we manufacture at our plant

1.    12mm - 30Kg - Good for 10 - 12 Repetitions or it’s depends on handling.

2.    12mm - 34Kg - Good for 12 - 15 Repetitions or it’s depends on handling.

3.    18mm – 45Kg - Good for up to 15 - 17 Repetitions or it’s depends on handling.

4.    18mm - 50Kg - Good for 17 - 20+ Repetitions or it’s depends on handling.

 So the Kgs mentioned is the weight of a single 8x4ft panel of a shuttering ply. If you notice most of them have the same thickness but their weights keep on increasing which basically translates into higher density, therefore higher repetitions.
    Second factor which affects repetitions is the thickness of the film coating used on both sides of the ply surface. Standard thickness is that of 45 GSM in the industry with higher quality panels with 60 GSM up to 120 GSM also available in the market as per requirement.
     Apart from these manufacturing factors, there’s also the usage factor which also matters a lot in delivering higher repetitions. For example, before each application, these panels’ surfaces have to be coated with oil to give a better finish as well as render the panel some resistance against the corrosive effect of cement & water. If not coated with oil, the film coating of the panels starts to wear off real soon.
      Another important lookout at the construction site is to seal any cut ply’s edges with acrylic paint to ensure water doesn’t find its way inside the ply. If not done properly, water tends to seep inside the core layers of the ply therefore allowing for absorption, bulging and finally splitting of the core layers due to weakened bonding which will in effect make the panel useless.

I hope all this helps in getting a better understanding.

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