![]() This method is widely used in building monolithic slabs for mega house construction projects where expansive soil sometimes creates problems. After the jacks are removed, tension remains and it transfers pressure to the concrete. When the tendons have tensioned sufficiently, according to design, they are fixed in position. After the concrete becomes hard, the tendons are tensioned by hydraulic jacks against the concrete. Tendons are placed at suitable places in the member and then casting is done. Similar to pre-stressing but here concrete is poured first then tendons are tensioned. ![]() Pre-tensioned Concrete Bonded Post-tensioned Concrete ![]() Then the tendon tries to get back to the original length but is resisted by the bond between the concrete hence it induces compressive force in it. Tendons are anchored and stretched and the stress is transferred to the concrete when it is hard. As a result, the tendons are protected from corrosion, and tensions are transferred directly. ![]() It creates good bondage between the tendon and concrete. In this method, wires or tendons are tensioned at first and concrete is poured later. According to the construction method, there are two kinds of prestressed concrete: ![]()
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