Treatment method for improving adhesive force of interfaces of new and old concrete

Abstract

The invention discloses a treatment method for improving the adhesive force of interfaces of new and old concrete. The treatment method includes the following steps that (1) shear reinforcement is reserved in an old concrete layer poured first; (2) chiselling treatment is carried out on an old concrete interface; (3) a high-performance interface adhesive is evenly applied on the old concrete interface to form an adhesive layer; and (4) after applying of the high-performance interface adhesive is completed, new concrete is poured immediately, the end of the shear reinforcement is anchored intoa new concrete layer, the new concrete layer is cured, and after the curing is completed, an adhesive structure of the interfaces of the new and old concrete is completed. According to the treatment method of the interfaces of the new and old concrete, the adhesive force of the interfaces of the new and old concrete is treated through a method of reserving the reinforcement in the old concrete, anchoring the reinforcement into the new concrete and combining with the adhesive, the bonding force and the adhesive force of the interfaces are greatly improved, the force transmission effect of the interfaces of the new and old concrete is improved, the shear bearing capacity of the interfaces is greatly improved, the construction quality is ensured, and the construction is convenient.

Description

technical field [0001] The invention relates to a method for treating the interface between old and new concrete, in particular to a method for improving the cohesive force of the interface between old and new concrete. Background technique [0002] In order to ensure the construction period, simplify the formwork system, and ensure the safety of tall formwork, a large number of construction methods of cast-in-place lamination and jumping warehouses are used in concrete pouring, so there will be a large number of new and old concrete interfaces, and the new and old concrete interfaces The specific bonding method and bonding mechanical properties directly affect the joint work effect of the old and new concrete structures. The existing new-old concrete interface bonding method usually uses adhesives, but the bonding strength of the new-old concrete interface is low, and it is easy to form a weak surface, which cannot form a continuous whole, and is prone to damage along the i...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing bonding method of the old and new concrete interface usually adopts the use of an adhesive, but the bonding strength of the new and old concrete interface is low, and it is easy to form a weak surface, which cannot form a continuous whole, and the force Afterwards, damage along the interface is easy to occur, leaving engineering hidden dangers. The purpose is to provide a treatment method to improve the bonding force of the new and old concrete interface. The new and old concrete is fixed by anchoring the old concrete to the new concrete with the adhesive. The bonding force of the concrete interface is treated, which greatly improves the bonding force and bonding force of the interface, improves the force transmission effect of the old and new concrete interface, greatly improves the shear bearing capacity of the interface, and ensures the construction quality. convenient