The emergence of chemical planting bars adhesive brings about the development of planting bars reinforcement technology. Through reasonable reinforcement of the reinforced bars, it is possible to solve the problems of new beams and columns, structural members extending or increasing the stress on the steel bars.
Through long-term research by experts, it is found that the joints between the beams and columns are the most vulnerable parts of the reinforced concrete frame, especially under the action of seismic forces. Generally speaking, the damage forms are as follows:
1. The beam end is broken. The beam end is yielded by the tensile steel; the concrete in the compression zone is broken; the concrete protective layer is peeled off, and the beam end forms a plastic hinge.
2. The column end is bent and destroyed. The column end concrete is crushed under the joint action of bending moment and axial pressure. The outer drum of the column bar is broken, and the column end forms a plastic hinge.
3. Anchorage damage. The beam is not properly anchored. Before the beam reinforcement has yet to yield, the bond between the steel and the concrete is first destroyed, and the beam is slipped or even pulled out.
4.The core area shear damage. Under the action of low cycle repeated load, the frame is laterally moved, and the concrete shear strength of the core area is insufficient, resulting in diagonal cracks or cross cracks. In severe cases, the concrete is peeled off and the hoops are externally drum or broken, and the column bars are flexed into a lantern.
In the above several types of damage, the first and second types are ductile failure, which is the effect required by the design, and the other two are brittle failure, which is designed to be avoided. Therefore, the planting node must have sufficient strength and necessary ductility, even in strong earthquakes, anchor failure and shear failure should not occur.
Therefore, in the selection of chemical planting bars adhesive, high-strength chemical planting bars adhesive should be selected for the above-mentioned failure characteristics. NJMKT high-strength chemical planting bar adhesive has strong anchoring force and is embedded in the same shape; no expansion stress, small margin spacing; quick installation, rapid solidification, saving construction time; hard plastic packaging; unused glue can be reused; suitable for almost all building substrates. The product anchoring force value meets the requirements of Class A adhesive of Concrete Structure Reinforcement Design Specification GB50367-2006, and it is underwritten by China Ping and has passed through strict safety certification.
If you are interested in this reinforcement product, please call our one-stop service hotline: 400-894-5118.
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(Editor: Nanjing Mankate, if you need to reprint, please indicate the source)
