Chemical anchor bolts, as a new type of anchoring material, have better performance compared to traditional anchor bolts. They are widely used in construction reinforcement projects due to their advantages such as convenient construction and strong anchoring force. The reinforcement principle is to fix the screw into the base material hole through a chemical adhesive to achieve anchoring. However, in actual construction, there may be situations where the reinforcement effect does not meet expectations, and the anchor bolt medication becomes ineffective. We can look for the reasons for such problems from the following aspects:
- Incorrect construction method
When using chemical anchor bolts, attention should be paid to the details of the construction project. For example, when rotating the anchor bolt medication, it should be terminated in time when the medication reaches the standard position. If it is not stopped promptly, the medication may be lost, which may lead to poor reinforcement of the rebar. The rotation speed and force may affect the penetration of the medication. Some construction workers directly tap the medication into the hole, which is the wrong approach and may result in the anchor bolt not touching the bottom or over-penetrating, which may affect the anchoring force of the chemical anchor bolt.
When using chemical anchor bolts, attention should be paid to the details of the construction project. For example, when rotating the anchor bolt medication, it should be terminated in time when the medication reaches the standard position. If it is not stopped promptly, the medication may be lost, which may lead to poor reinforcement of the rebar. The rotation speed and force may affect the penetration of the medication. Some construction workers directly tap the medication into the hole, which is the wrong approach and may result in the anchor bolt not touching the bottom or over-penetrating, which may affect the anchoring force of the chemical anchor bolt.
- Inadequate hole cleaning
When using chemical anchor bolts, we must carry out drilling treatment for the reinforcement parts. The drilled holes need to be cleaned, and a brush can be used to clean the holes, implementing "three blows and three brushes" to ensure that there is no dust or water left inside the holes. Impurities will affect the curing of the medication, and if the actual effect of the chemical anchoring is poor, the reason is likely that the hole cleaning is not in place.
- Storage and transportation of chemical anchor bolts
The temperature during the storage and transportation of chemical anchor bolts also needs attention, which should be kept between 5°C and 25°C, and it should be dry and shaded. Temperatures that are too low or too high will cause the performance state of the chemical medication to change, thereby affecting the subsequent reinforcement effect.
- Quality issues of the medication itself
The adhesive of the chemical anchor bolt is composed of quartz sand, resin, and curing agent. If the content of the curing agent is too low, it may lead to slow curing speed or even failure to cure of the adhesive. Some products' chemical adhesives contain a lot of butadiene, which is unstable when heated, reducing the fire resistance characteristics of the chemical anchor bolt, unstable quality, shorter storage time, and not resistant to aging.
In addition, before construction, it is necessary to observe the state of the medication. Check through the glass packaging whether the medication has crystallized and whether there are any issues with fluidity. The medication with excellent performance should exhibit a fluid state. The state of the medication may also change at low temperatures, and attention should be paid to this during the construction process. If necessary, the medication should be warmed and insulated.
- Quality issues of the screw
Screws of unqualified quality cannot pass the tensile pull test during construction and will directly affect the anchoring performance. Therefore, when selecting chemical anchor bolts, it is necessary to have a keen eye to identify and prevent the purchase of inferior anchor bolts with poor anchoring force. Recognize the brand and carefully select products that have passed quality inspection to ensure that the engineering anchoring achieves the expected effect.
SHB-Chemical Anchor Bolts are made from high-quality carbon steel and stainless steel raw materials, showing excellent performance in acid and alkali resistance, low-temperature resistance, aging resistance, and heat resistance. They can also carry a long-term load stably in a humid environment, with strong seismic resistance, and the pull force is similar to that of embedded bolts. Whether in bridges, tunnels, or building construction, SHBANG high-strength chemical anchor bolts play an important role!
Small anchor bolts show great effects, and in the near future, SHIBANG chemical anchor bolts will play a greater role in construction reinforcement projects! SHIBANG - Building a trustworthy safety for you!
