Preparation of solidification type dead burning structure glue in low-temperature and humidity surroundings

Abstract

A method for preparing steel-bonding structural adhesive curable in low-temperature and humid environment comprises the following steps: preparing a component A; preparing a component B; and mixing the component A with the component B at a weight ratio of 1:(0.3 to 0.5) to obtain the steel-bonding structural adhesive curable in low-temperature and wet environment. The steel-bonding structural adhesive can fully meet the requirement for steel-bonding construction in the environment with a temperature of subzero 10 to 0 DEG C and a relative humidity larger than 65 percent. A test shows that, 168 hours after the curing, the compressive strength of the adhesive is equal to or larger than 65 MPa, steel-steel tensile shear strength is equal to or larger than 15 MPa, steel-steel adhesion tensile strength is equal to or larger than 33 MPa, and the normal tensile bonding strength with concrete is equal to or larger than 2.5 MPa.

Description

1. Technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a preparation method of a low-temperature and humid environment-cured steel-bonded structural adhesive. 2. Background technology [0002] Existing technology: China has a huge construction market. Among the existing buildings of nearly 10 billion square meters, a large number of structures and bridges, culverts, and tunnel structures, concrete structures account for a large proportion. In these concrete buildings, due to defects in design and construction and aging, damage and disasters in the long-term use process, the concrete structure cracks, poor seismic performance, insufficient bearing capacity and other problems that affect their safety and use functions are urgently needed. High-tech reinforcement materials that are durable and easy to construct and the construction technology of reinforcement and repair. When this method is used to bond and strengthen ...

AI Technical Summary

Problems solved by technology

[0003] In the past ten years, reinforcement techniques such as planting reinforcement anchorage, pasting steel plates and carbon fiber cloth have been widely used in China, which to a certain extent has promoted domestic construction structural adhesive manufacturers to continuously improve the formula process and develop new varieties, but also exposed many existing problems. Insufficient: For example, the specialization of varieties is not enough, the use of technology cannot fully meet the needs of on-site construction, there are no special varieties to choose from under special circumstances, etc.

For example, for bonding steel structure glue, the room temperature curing type needs to be cured at room temperature at about 23°C for 168 hours, while in the northern region, the temperature is between -10°C and 0°C for half a year from October to April of the next year. At this low temperature, the curing speed of ordinary building structural adhesives is difficult to meet the needs of the construction progress, so that the construction of some projects that urgently need reinforcement and transformation has to be postponed or even wait for the temperature to warm up in the next year before proceeding.