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Right in the middle of the plant

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Here at NR we are not throwing away our remaining/returned concrete since many years ago.

We are continuing this zero emission system also in our new plant that we started this January.

To organize our new plant we took some ideas from many GNN plants.

And we decided to put our concrete recycling pool and equipment right in the middle of the plant, so everybody can see how we are treating our waste and transforming it into a re-usable material.

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Depending on the conditions of the remaining/returned concrete, its slump, sludge and washing water, the process may take from 5 to 10 minutes.

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After the treatment the obtained material is placed on the ground.

Then it is mixed together with previously made IWA aggregates and becomes itself part of the recycled aggregates stockyard.

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Once required, the IWA aggregates are moved on the above hopper, where the too big pieces are removed.

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When the remaining concrete comes back at the plant it is discharged into the pool. 

Then the drum is washed and the dirty sludge water is thrown into another pool (picture above).

After a while the water is made go through the red fence, leaving inside the pool only the hard part of the sludge (pic below).

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This is then mixed with the remaining/returned concrete and treated by Re-Con Zero EVO.

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The water is then treated separately and used again to mix our recycled concrete.

So nothing is disposed in our plant, but everything is re-used.

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Sludge and waste emissions=0.

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In the above pictures Mapei's Re-Con Zero EVO boxes, used to treat our remaining/returned concrete.

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Then we made a demonstration also with CellDrone, the paper powder to treat small amounts of concrete.

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Remaining/returned concrete happens everyday in every plant.

It is not easy to change habits and attitude, but we must do it.

It took about 10 years to us at NR to create this system for concrete recycling.

Of course it is not yet 100% perfect, so with the help of GNN members and the remaining concrete forum we want to continue to make it better and better.

Our goal is to make it easier for our young people, so they don't have to worry anymore about remaining/returned concrete in the future.

 

Mitsuya Miyamoto (translated by Alberto Ferrari)

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