The pre- stress concrete structure, Found to-be More Effective Then THE Reinforced concrete structure & System developed for mechanism OF, Anchoring devices in pre and post Tensioned concrete structural elements.

摘要

The pre-stressing concrete Used for casting of section is quite different from reinforced cemen ts concrete (RCC.) in concrete Technology. The pre- stressing system used is o f two kind, pre- tensioning & posttensioning methods. The prestressing by pre &post tensioning device mechanism, developed for Anchoring system in concrete structural element is adopted for structures. In modern type of Pre stressing electricity with Low voltag e and high current is used in anchoring for a concrete mem ber & sulpher Coating as applied on steel bars working, as duct material before the casting of concrete member. While supplying electricity in the structure sulpher get melted up because heat genera ted in the steel structure & allow them for pre stressing. No provision of any d uct is required .The High strength steel alloy structure could be anchored by tightening nuts at both the ends. The Pre-stressing in concrete structure is found more effective then RCC technology. To-day prestressing is preferred for large structures like bridges etc. ,it is required to adopted for all small concrete structure sections also. It is to-days demand to replace RCC completely by Pre-stress concrete, because of RCC have large section with less strength as compare to pre-stress concrete. In RCC System it is rein-forced first and then loaded after casting, when ever in the Pre stressing system, where reinforcement which may called 'tendons' are as one kind used for stressing in the concrete itself . They are stressed first then casted & force is applied. It is required that, effective & less cost (Economic) anchoring devices must be available for the prestressing techniques; It is because of its initial investment is high and less pre-stress work is restricted also, must be possible to make adoption easily. It is found possible to make concrete having light weight & high strength in all structures. High strength alloy steel & Rich strength concrete may be used along with large prestressing force application along with avoiding grouting in to pos- tensioned duct