Know 'foundation bolts' and 'chemical anchor bolts'

In the process of building construction management, I really have endless technical knowledge. I have encountered two methods of anchor bolts in steel structure engineering. One is the common embedded anchor bolt and the other is chemical anchors. bolt. In the field of industrial and civil construction, the use of chemical anchors is relatively small. So what is a chemical anchor?

As a new, simple and effective post-fixing method, chemical bolt anchoring construction has been widely used in building renovation, building use change, or existing building renovation and expansion.

The so-called chemical bolts should have acid and alkali resistance, low temperature resistance, aging resistance, good heat resistance, no creep at room temperature, water stain resistance, long-term load stability, solder resistance, and good flame retardancy in a humid environment , Good seismic performance and some of these properties.

The composition of chemical bolts: Chemical bolts are composed of chemical hoses, screws, washers and nuts.

The screws, washers and nuts (hexagonal) of chemical bolts are generally available in galvanized steel and stainless steel (hot-dip galvanized as required). Chemical bolt anchoring technology belongs to post-reinforcement technology. (Guide: Some basic common sense that you have to read about fasteners)

Chemical anchor bolts are high-strength anchor bolts made of vinyl resin as the main raw material. In the early days, they were called chemical bolts. Chemical anchor bolts are a new type of anchor bolts after expansion anchor bolts. They are cemented and fixed to the concrete base material borehole through special chemical adhesives to realize the composite part that anchors the fixed parts.

Chemical anchor with powder

Chemical hose (or pharmaceutical tube wrapped in plastic) contains reactive resin, curing agent and quartz particles.

Anchor bolts can be divided into fixed anchor bolts, movable anchor bolts, expansion anchor anchor bolts and bonded anchor bolts. According to different shapes, it is divided into: L-shaped embedded bolts, 9-shaped embedded bolts, U-shaped embedded bolts, welded embedded bolts, and bottom plate embedded bolts.

Anchor bolts are generally made of Q235 smooth round steel. The hook is to ensure the friction between the bolt and the foundation, so that the bolt will not be pulled out and damaged.

Compared with chemical anchor bolts, expansion bolts are a kind of mechanical bolts. Expansion bolts are bolts that are fixed to a fixed body after expanding the jacket by its own taper.

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