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What are the matters needing attention in using gluing steel glue?
Date:2020-09-08 09:40:00 Share:
Bonding steel plate reinforcement, also known as sticking steel plate reinforcement, is to use high-performance epoxy adhesive to bond steel plate on the surface of concrete components, so that steel plate and concrete form a unified whole, using the good tensile strength of steel plate to achieve the purpose of enhancing the bearing capacity and stiffness of components.
 
What are the steps of gluing steel glue?
 
Surface treatment of concrete and steel plate → unloading of reinforced members → preparation of hm-120 structural steel adhesive in proportion → gluing and pasting → anchoring and pressurization → solidification → unloading support → quality inspection → anti-corrosion and subsequent treatment.
What are the matters needing attention in using gluing steel glue?
 
1. Before using the steel glue, the type, grade, batch number, package, Chinese mark, product certificate, date of delivery, inspection report and other data on the construction site shall be in good condition.
 
2. Attention should be paid to the test report of steel adhesive. At present, many manufacturers in the market have issued test reports based on the standard for concrete structure reinforcement plan (GB 50367-2006), but this set of standards has been abolished after the implementation of the standard for concrete structure reinforcement plan (GB 50367-2013). At present, more standardized manufacturers, such as sels, use the latest and strictest code for safety appraisal of application of engineering structural reinforcement materials (GB 50728-2011) as the test basis. The test basis of "standard for reinforcement plan of concrete structures (GB 50367-2013)" is also indexed to "code for safety appraisal of application of engineering structural reinforcement materials (GB 50728-2011)".
 
3. If the steel glue used does not provide the test report of fatigue stress resistance, measures such as traffic interruption and business suspension should be taken at the construction site, and the steel glue can be reopened after curing. Generally, the freeze-thaw resistance report is required for steel adhesive used for construction in Northeast China, and the report on moisture heat aging resistance and heat resistance aging performance is required for steel adhesive for construction in South China. If the design requires that the service life of the adhesive is 50 years, the adhesive must pass the test of resistance to damp heat aging and long-term stress action.
 
4. The normal steel glue should be a putty like colloid without bubbles. For example, the better glue, such as sels, will not have obvious delamination and precipitation even after standing for one year. However, if the general steel glue is used, if there is precipitation or stratification, it needs to be stirred evenly before use.
 
5. The bonding surface shall be set out and polished according to the requirements, and the aggregate shall be exposed. The two components of the adhesive shall be mixed in strict accordance with the proportion and mixed evenly. A. B glue mixing tools shall not be mixed.
 

6. When the temperature on the construction site is too low, iodine tungsten lamp, electric furnace or water bath can be used to preheat the glue to about 30 ~ 50 ℃ before application, and it should be noted that water should not be mixed into the barrel. In addition, the bonding part of steel glue was heated to above 0 ℃ and maintained for more than 24 hours after sticking.
 
7. After fully solidified, the steel glue is non-toxic material, but the components before curing are generally irritating to skin and eyes. Therefore, construction workers should pay attention to labor protection, such as safety helmet, work clothes, gloves, etc.
 
8. The higher the ambient temperature of the construction site is, the shorter the operation time is. The amount of steel glue should be estimated before use to avoid unnecessary waste. The glue that can not be used up at one time in the packaging barrel needs to be sealed and stored tightly, which is also a very important thing to pay attention to in the use of gluing steel glue.