Post Stressed Anchor – Drop By Our Team Today To Locate Further Pertinent Facts..

Post tensioning is actually a way of strengthening concrete. Post-tensioning tendons is stressing anchorage inside plastic ducts or sleeves, are positioned in the forms ahead of the concrete is put.” Post tension cables ultimately let us safely build large concrete constructions. They allow larger spans, thinner slabs and greater distances between support commons. Post tensioning is utilized in bridges and box girder structures globally such as on our bridges, off and on ramps. These tendons have the ability to develop structures which may not otherwise be attainable. Because concrete is not flexible it may crack under loads. Although rebar is used to strengthen the concrete to stop cracks from growing the concrete can certainly still sag under increased loads. PT or post tension tendons are load bearing and can stand large increases in loads bearing up the concrete.

There are many benefits which are gained using a post-tensioned approach. It enables flexibility of design, faster construction and lower material costs. Over time, it can reduce maintenance costs and permit for increased loads as time passes.

Bridges that utilize post tension tendons are able to contain long and clear spans, have few beams and slender members and thinner slabs may be used which can be unachievable in the event of regular bridges. This technique reinforces or strengthens the concrete or other material with high strength steel bar or strand which is known as “tendons”. It significantly cuts down on the building weight and foundation load which can be very helpful in seismic areas.

Post tension tendons aid in construction of wedge anchor which includes specific geometry requirements such as complex curves and super elevation. Extremely long span bridges can be constructed through the help of post tension tendons. Such architectures functions effectively without disrupting the traffic moving under it as well as cuts down on the effect on environment significantly.

Post tension tendons are made of prestressing strand, anchorage, ducts, and grout and corrosion protection materials. As this technology is completely new therefore you will find no inspection systems for tendon components. Recent cases of corrosion of post tension tendons in complex bridges are becoming a substantial problem.

Once you have details about tendon corrosion, department of transportation has inspected their post tension structure inventory to evaluate and quantify the pace of tendon corrosion and also to estimate the other lifespan from the affected member.

Infrastructure Preservation Corporation (IPC) has developed a thorough post tension tendon inspection service named “TendonScan┬«” which utilizes non destructive testing and evaluation methods that may find corrosion and section loss within a PT tendon.

What it is? Since we have mentioned previously that it must be a thorough tendon scanning system which works on non destructive testing principals to learn voids, water intrusion and bleeding grout in external tendons. This method comes with a device to detect section loss in the tendon.

Why was it developed? During construction of complex bridges, tendons are filled in grout to stop corrosion. But during grouting process, the grout is likely to separate depending on grout’s quality, admixtures, pumping equipment and operations. This separation result into low pH grout at tendon points and anchorage which made these locations prone to corrosion. Complex bridge inspection is incomplete without tendon testing therefore we have developed this TendonScan system to solve this problem.

The way it is utilized? It really is a battery operated robotic system that uses the latest in non destructive testing and modern technology. This system couples itself with all the tendon and travel along it to carry out a MRI like inspection of smtzmh material inside it. The inspector stands on the mobile control unit which travels together with the sensor. The sensor works through wireless connectivity to deliver the collected data. The information is moved to control station for real-time assessment of the tendon condition. The photo of internal section of tendon will be illustrated in 3D color graphics to ensure that any discontinuity like water intrusion, void or bleeding grout can be identified and quantified easily.

What problem does it solve? This post stressed anchor helps in locating corrosion, voids, bleeding grout, section loss as well as other problems in and out of the tendon. Moreover, it may also help in monitoring the discontinuities over a duration of time which will help in deciding that whenever to correct or replace a post tension tendon.