There are various parameters for injection anchoring epoxy to measure the quality of glue, and thixotropy is of course important for injection anchoring epoxy. How important is it? HORSE will give you a popular science today.

The thixotropy of injection anchoring epoxy may not be known to many friends. To put it simply, thixotropy means that the viscosity of the glue drops rapidly under agitation, which is convenient for painting. When it stops, the viscosity of the glue increases immediately and will not flow randomly. This is what we call thixotropy.

Don't underestimate thixotropy, it is very important for planting steel bars, bonding steel plate, and bonding carbon fiber. Because the glue has good thixotropy, it can reduce labor intensity and ensure the uniformity of painting and the controllability of glue seam thickness.

Is the thixotropic index larger the better? Not really!

It should be pointed out here that the thixotropic index of the injection anchoring epoxy is not as large as possible. Because the thixotropic index is too large, it means that the initial viscosity of the glue is very large. Although the viscosity will drop quickly during the brushing process, the decreased viscosity will increase immediately as soon as the brushing stops. So that the glue has no time to let the bubbles escape, which will affect the bonding strength of the adhesive due to the deterioration of the defoaming property.

As for the adhesive for bonding fiber fabric, although it is also required to be easy to brush, it also requires that the glue has good infiltration and permeability to the fiber. This property is clearly at odds with thixotropy. However, experiments have shown that through coordination, both indicators can be within an acceptable range. Take carbon fiber impregnated glue as an example. Carbon fiber fabric is coated with impregnated glue, in addition to requiring easy construction of glue, it must also require low glue viscosity and easy penetration of carbon fiber cloth. Make carbon fiber cloth wire and wire, layer and layer, layer and substrate concrete surface can be good adhesion. Therefore, the carbon fiber impregnating glue after research and development: low viscosity, good wettability, and certain thixotropic properties.

Therefore, the measurement of thixotropy index is of great significance to engineering construction. Why do you say that?

Take steel bonding glue as an example, because of its good thixotropy, the glue is easy to be brushed and evenly distributed, and after the brushing is completed, the glue is not easy to flow. Its significance to the reinforcement project is visible. When the steel glue adhesive with poor thixotropy is operated on the elevation or upside of the concrete structure, the glue will easily flow out from the bottom of the component under the action of gravity. It not only contaminates the surface of the substrate, but also causes unwarranted waste of glue. The bonding effect is even more predictable.

In the process of planting the steel bar, when the steel bar is rotating, the injection anchoring epoxy is also required to be in a low-viscosity state, so that the glue can be in good contact with the steel bar itself. After the reinforcement is planted, the colloid is in a high-viscosity state and can well wrap around the reinforcement. The modified injection anchoring epoxy glue is especially suitable for side or top anchoring planting bar because of its "touch and change" characteristics.

In summary, a good thixotropic injection anchoring epoxy adhesive has the following benefits for reinforcement projects:

　　1. The injection anchoring epoxy has good stability during storage and transportation;

　　 2. Good construction performance, no wire drawing or flow during construction;

　　3. Glue is more even;

　　4. Keep the working surface clean and tidy;

　　5. Better gluing effect;

　　6. Save glue and save engineering cost.