CHEMICAL & ELECTRICAL METHOD IN POST TENSIONING OF PRE - STRESSING CAN BE USED FOR MAKING DUCKED THROUGH S TRUCTURAL ELEMENT AFTER CASTING

The pre - stressing concrete used for casting of section is quite different from Reinforced cements concrete (RCC.) in concrete Technology. The device mechanism developed for duct forming & anchoring with less losses of pre - stressing value in steel bars o f concrete structural element. In modern type of pre - stressing electricity with low voltage and high current is used for a duct forming in concrete member & sulpher coating on steel bars, as duct material. While supplying electricity in the structure, sulpher get melted up because heat gen erated on the steel bars of the structure. No provision of any duct formation is requiring in concrete structural element. The high strength steel structure could be anchored by tightening nuts at both the ends. The Pre - stressing in concrete structure ele ment is found more effective as compare to the RCC technology. To - day pre - stressing is preferred for many large structural elements like bridge etc. minute modification is required to adopt for all small concrete structure section s also. It is demand to re place RCC completely by pre - stress concrete, because of RCC have large section with less strength as com pare to pre - stress concrete. RCC system is rein - forced first, to concrete structural element and then loaded after casting, when ever in the pre - stre ssing system, where reinforcement which are stressed first then casted & force is applied