At present, reinforced concrete structures play an important role in various structural forms all over the world. However, due to prolonged service life or other reasons such as natural disasters, such as reinforced concrete members strength, stiffness caused by insufficient cracking, damage and other frequent occurrences.

In China, many buildings built after the founding of the People's Republic of China have reached the peak period of maintenance and reinforcement after decades of use. How to ensure the normal and safe use of buildings is a common problem encountered by the construction industry. In recent years, due to the change of the use of the original structure of the building, members of the transformation, reinforcement and reinforcement of the project is also increasing. Through the long-term efforts of engineers and technicians, a set of relatively perfect and feasible engineering reinforcement methods has been gradually formed, which has been widely used and developed in the actual reinforcement projects. At the same time, with the rapid development of science and technology, the emergence of a variety of new building materials also provide favorable conditions for the continuous innovation and upgrading of reinforcement technology and methods.

Application of structural adhesive in structural reinforcement

This kind of application mainly uses structural adhesive as a bonding material. The steel plates or profiles used for reinforcement, or other reinforcement materials such as carbon fiber, aramid fiber and chloride fiber, are firmly bonded to various reinforced concrete members, such as beams, columns, joints, bracket slabs, tunnels and arch roofs, and satisfactory results have been obtained. For example, beams can be ordinary load-bearing beams on buildings, crane beams, highway bridges and slab beams, railway bridges and other reinforced concrete beams. Through careful design, the effect of reinforcement is very good.

The application of building structural adhesives in chemical bolts or anchor bars is another widely used area as chemical adhesives in Post-Anchorage technology. It buries bolts, reinforcing bars, plastic poles and other anchorage materials in concrete, rock, brick, stone and other substrates, exerts the bonding strength of building structural adhesive, makes the Post-Anchorage firmly embedded in the substrates, and plays a bearing role under the external force. This is one of the areas of rapid development and application in recent years, ranging from the planting of anti-seismic steel bars to the embedding of a screw for decoration, building structural adhesives are useful.

The application of building structural adhesive in pouring and repairing bonding can be the application of pouring and bonding steel plates for strengthening steel sheets and concrete members. Building structural adhesive can combine steel plates and concrete firmly and play a joint effect. It can also be used to plug the cracks in general components to meet the original design requirements and prevent the cracks from expanding. This kind of application is also a wide range of fields, not only can be used in building components, also can be used in hydraulic engineering and military engineering and other structural repair and repair.

Application of building structural adhesive for construction of bonding components.The scope of application is that structural glue has just begun. It has been used in the splice and assembly of the concrete roof of the Sydney Opera House in Australia. In China, there are some practical examples of column and foundation pile lengthening, but the basic research of design theory and calculation method is still in its infancy, and it is still in use at present, but the development and application prospect of this field is very broad.

Application of building structural adhesives in bonding and repairing various buildings. Adhesives can also be used to bond and repair all kinds of old buildings, ancient building timber structures, concrete structures, stone structures and brick structures, etc. They can also be used to repair a certain unit component. The repair process is simple and the repair and repair effect is good. There are many examples of this application. In addition, it has decades of application history in the repair of highway surface and airport runway. There is also a broad prospect for hydraulic underwater bonding.

The application of building structural adhesives in other fields is the application of building and engineering. Such as emergency rescue of various projects, waterproof and leak plugging, sealing and moisture-proof and anti-corrosion applications.