The steel strand caused by slow bond and non bond is a new type of non bond steel strand which is located between the non bond steel strand and the bonded steel strand.

It is a new prestress technology that has the advantages of free cable laying, convenient use, no need to pass the duct setting and grouting, and the characteristics and safety of the bonded steel strand in later use. 

The action mechanism and experiment of slow adhesion non adhesion steel strand.