Protection method of prestressed concrete post-tensioning steel strand anchorage
A steel strand and concrete technology, applied in the field of science, can solve problems such as the difficulty of fully sealing the anchor clips and anchor holes, the complex structure of the porous anchorage system, and the impact on the bonding of new and old concrete, so as to ensure long-term service safety , The protective operation specification is easy to follow, and the protective effect is good
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Embodiment 1
[0060] A prestressed concrete post-tensioned steel strand 10 anchorage protection method, the protection method requirements of the prestressed concrete post-tensioned steel strand 10 anchorage are as follows:
[0061] 1) First, use a solvent-free thermosetting polymer liquid paint to repair and pour the paint to specifically perform surface coating anti-corrosion maintenance treatment, and form an insoluble and fused durable protective coating on the outside of the anchorage of the steel strand 10; the solvent-free thermosetting polymer liquid The performance index of the coating should meet the requirements stated in Table 1;
[0062] 2) Select reasonable perfusion plastic jackets and fixtures: through reasonable design, chlorine-free plastic jackets can protect the prestressed concrete post-tensioned steel strand 10 anchors on site, whether they have been stretched or not. The tension can be installed quickly, and the seal is reliable, and the length of the injection is arb...
Embodiment 2
[0087] The content of this embodiment is basically the same as that of Embodiment 1, and its difference mainly lies in:
[0088] In the prestressed concrete post-tensioned steel strand 10 anchorage protection method described in this embodiment, the anti-corrosion construction scheme of the anchor head of the pre-stressed concrete post-tensioned steel strand 10 anchor is specifically the sheath pipe anti-corrosion method: The specific requirements of the sheath pipe anti-corrosion method are (anchor system anti-corrosion as attached figure 2 ):
[0089] 1) After the on-site prestressed steel strand 10 is stretched, use a special hydraulic cutting tool to cut off the excess steel strand 10 at the tensioned end;
[0090] 2) Use an appropriate method to quickly remove the oil stains left during the anchorage tensioning process, and then use a special cleaning agent to quickly clean up the remaining pollutants;
[0091] 3) According to the stripping length of the 10 steel stran...
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