Production process

1.   Precast concrete purlin producing bed prepare and tensioning.

1.1  Cleaning the producing bed：Clean the concrete residue on the producing bed with special tools and make the platform surface clean, smooth.

1.2  Painting parting agent：The adopted parting agent must be up to the required standard without harmful
chemical substance.

1.3   Distribute the steel wire.Steel wire of low relaxationand stress relieving is adopted .

2.  Prestressed concrete purlin material compositions and quality standard 

1.1 Cement：32.5R or 42.5R Portland cement and ordinary Portland cement

1.2  Sand：Medium sand

1.3 Stone：Rubble and broken pebble are optional

1.4  Water：Drinking water without harmful substance

1.5   Dry concrete is used for precast purlin material with a strength grade of C30 or C40.

3. Precast purlin technological flow

Cleaning the producing bed→ painting parting agent→ distribute steel wire and fix→tensioning the steel wire→ mix and transportation of concrete → slab molding →make testing block→ covering and curing →testing block intensity →relief the steel wire→ cutting slab→ storage

We can design and manufacture all kinds of concrete forming equipment according to customers'demands. Meanwhile we also can provide our costomers a complete set of technology and solution for all producing flow.