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There are exceptions.

Surface is pressureless, guess is to hang pulp or dip process, board has long and short, some show bubble, the thickness of visual paste is about 2~5mm.

Recently, on a business trip, I saw the foam core made by customers and wrapped the thick board of mud outside.

After the formwork was handed over to the customer for use, the customer made it with concrete, and the feedback was good.

In 2005, I made a formwork for concrete components for a Japanese customer, with a plane size of 6m x2 8m, the flatness is required to be controlled within 3mm, and there are some retaining edges, some of which are special-shaped.

This shows that someone is developing the technology of thermal insulation materials for precast buildings.

Limited by geographical conditions such as earthquake and sea waves, Japan faction usually uses steel as the skeleton and thin plates, wood and thermal insulation materials to make houses, with light materials.

The European and American school focuses on factory prefabrication, which is precast with dry and hard concrete, and the precast parts are usually heavy.

Rebar Cap

Finally, in order to ensure the accuracy, the edge is processed on the machine tool and the tool marks are eliminated by grinding.

At that time, in order to ensure the accuracy, it was made on two large platforms, the plane plate was cut by plasma, and the deformation of the control plate was controlled.

Precast buildings are divided into European and American style and Japanese style.

The thickness of the foam is about 100mm, and it is hung with fiberglass cloth and fine lime mud.

Weigh it with your hand: sink.