Handan Zhongfu Industrial And Mining Accessories Co., Ltd.
Handan ZhongFu company is a professional manufacturer for underground mining supporting products with over ten year experience. We can manufacture Split sets ,friction bolt, Combi split sets, Expandable friction bolt,Swellex, Threaded bar bolt, Cable bolt, Combi cable bolt, Welded mesh, Domed plate, Nuts, other mining Equipment.
What are the process characteristics of prestressing anchors?
Firstly, make the member, and leave the corresponding aperture in the member according to the position of prestressing tendons, after the concrete strength of the member reaches the specified strength (generally not less than 75% of the standard value of the design strength), put the prestressing tendons into the reserved aperture for tensioning, and use anchorage to anchor the tensioned prestressing tendons in the end of the member, and rely on the anchorage at the end of the member to pass the pretensioned tension of the prestressing tendons to the concrete, so that it produces pre-compressive stress; finally, pour cement paste into the aperture, so that the prestressing tendons form a whole with the concrete member. The pre-tensioning force is transmitted to the concrete by the anchorage at the end of the member, so that the pre-compressive stress is generated; finally, cement paste is poured into the aperture to make the pre-stressing tendons and the concrete member form an integral whole.
process characteristics
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Wedge And Barrel
First pouring concrete, until the concrete reaches the design strength of 75% or more, and then tensioning steel (rebar bundle). The main tensioning procedures are: buried control holes → pouring concrete → pumping pipe → maintenance through the bar tensioning → anchoring → grouting (to prevent rusting of steel bars). The force transfer pathway is to rely on the anchorage to prevent the elastic rebound of the steel bar, so that the cross-section of the concrete to obtain the pre-compressive stress, this practice makes the reinforcement and concrete as a whole, known as bonded prestressed concrete.
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Bonded Prestressed Concrete
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Wedge And Barrel
Bonded prestressed concrete should be minimized because the effect of the bond (resistance) reduces the tensile stress in the prestressing steel reinforcement, leading to a reduction in the compressive stress in the concrete. This method is simple, does not require a tensioning table, flexible production, and is suitable for on-site construction of large components.
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Wedge And Barrel
The main tensioning procedures for the prestressing steel along the entire length of the exterior of the lubricating and anti-corrosion materials such as asphalt coating → wrapped with plastic paper or casing (prestressing steel and concrete does not establish a bond) → pouring concrete maintenance → tensioning steel → anchoring.
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Unbonded Prestressed Concrete
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Wedge And Barrel
Construction with ordinary concrete, will be placed into the design position of the reinforcing steel can be poured directly into the concrete, do not have to reserve holes, wear bars, grouting, simplify the construction process, due to the effective pre-compressive stress of non-bonded prestressing concrete increased, reduce the cost of the beams for large spans of curved reinforcement.
Our address
West Side Of Jianshe Street, Southwest Industrial Zone, Linmingguan Town, Handan, Hebei, China
Phone Number
+8615830050566
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