Affiliate Blog Article – Epoxy Anchors
Affiliate blog article for a fastener manufacturer.
What Makes An Epoxy Anchor Fail?
In most concrete fastener applications, a connection is maintained through proper tension between the installation material and the inserted portion of the fastener. Concrete anchors will usually do this through the structure of their threads or expansion capabilities, as in the case of nail-in or sleeve anchors.
There is an additional type of concrete anchor that delivers an extra secure hold with the aid of special curatives. They are known as epoxy anchors.
Epoxy anchors work in many applications that need an exceptionally reliable installation, but where installation tools or mechanical anchors will not work. Epoxy anchors, also called chemical or adhesive anchors, are not just fasteners, but a special combination of an anchor and resin, which creates a strong and cohesive bond with concrete. They can be used in notably challenging placements, including cracked or thinner concrete, overhead placements, and softer materials like brick and tile.
These anchors deliver many advantages, but they are not flawless. There are issues that can cause epoxy anchors to fail. Here are a few common mistakes that should be avoided when using these fasteners.
Installation Depth or Placement Issues
As with most construction anchors, epoxy anchors are meant to be installed into tapped or pre-drilled holes. Drilling to fit the diameter and length of the anchor is critical to a reliable installation. This is especially true for epoxy anchors, as one of the leading reasons for failure is insufficient embedment depth.
The tapped hole must be deep enough to accommodate the resin as well as the anchor. This is very important for fostering a sufficient and long-lasting bond with the surrounding concrete. It will also ensure the anchor will deliver the right hold for the application.
Curing Faults
Even if the installation site is prepared properly, faults can still occur during the curing process. Epoxy anchors facilitate a quick and easy installation, but there are a number of factors that need to align. This includes the proper consistency and ratios of the acrylic epoxy and the curing agent. Incorrect ratios will amount to resin that becomes weak, brittle, or that never fully cures.
Epoxy anchors are typically provided in an easy-to-dispense cartridge, which can prevent ratio and mixing problems. AC 100 epoxy and HY200 epoxy anchors, for example, are offered in special containers that help to ensure a more efficient and consistent insertion with less mix-ratio sensitivity.
Even with easy installation methods, other factors such as temperature, humidity, and time can interfere with curing. Almost all epoxy anchor kits will indicate ideal curing conditions regarding surface and ambient temperature ranges, as well as humidity.
In general, resins will cure best in moderately warmer conditions and when the installation temperature is consistent with the temperature at which the epoxy anchor cartridges are stored. Colder temperatures will amount to a slower curing process and extreme cold could prevent the epoxy from curing completely.
In addition to temperature, make sure the epoxy anchor is given ample time to cure without being disturbed. Depending on the product, curing time can range from several hours or days. Attempting to use the anchor prematurely can cause the installation to fail.
Mismatching Product With Job Demands
While epoxy anchors are versatile, they are still light-to-moderate duty components. If they are used in applications that call for high-strength, heavy-duty mechanical anchors, they may fail. Issues can also occur if the epoxy formula is not correctly matched to the job parameters. For example, A7+ epoxy anchors can be used with treated rod or rebar, but other acrylic formulas are not suitable for such pairings.
Carefully evaluate the parameters of the job and selecting an epoxy anchors formula that meets those requirements are vital to ensuring they preform as required and maintain their hold without fail.