Incomplete hole cleaning can reduce the performance of chemical anchors by up to 70%?
Hole cleaning is the most critical yet easily overlooked step in chemical anchor installation. Dust and impurities remaining in the hole can form a barrier layer, severely hindering the effective bonding of the chemical anchor to the concrete substrate.
Experiments show that compared to standard hole cleaning, uncleaned holes can result in a 70% reduction in the final anchoring performance of chemical anchors!
Standard Solution:
Use specialized tools: A dedicated air blower, vacuum cleaner, or air gun must be used.
Follow the hole cleaning procedure: It is recommended to follow the “blow, brush, blow” principle—first blow with an air gun, then repeatedly brush with a specialized hole cleaning brush, and finally vacuum to ensure the hole is dust-free and dry.
Improper drilling significantly reduces anchoring strength.
Each chemical anchor has its own designed drilling parameters. Failure to drill according to specifications will directly lead to anchoring system failure.
Excessive Drill Diameter: This results in an excessively thick adhesive layer, causing the chemical anchor to “wobble” within the hole and significantly reducing pull-out strength.
Insufficient Drill Depth: The required anchoring depth cannot be achieved, making the anchor easily pulled out.
Strictly Follow Parameters: Before installation, always consult the product manual and strictly adhere to the drill bit diameter and drilling depth specified by the manufacturer.
Use Standard Tools: Use calibrated drill bits and depth gauges to ensure accurate drilling dimensions.
Incompatible Installation Methods and Environment
Incorrect selection and installation methods for chemical anchors may not be suitable for specific construction environments and subsequent usage conditions.
High-Temperature Environments or Welding Operations
Risk: If high-temperature operations such as welding occur nearby after installation, the chemical agent in ordinary epoxy resin-based chemical anchors will rapidly degrade due to the high temperature, resulting in zero anchoring force.
Solution
Choose High-Temperature Resistant Products: Chemical anchors using high-temperature resistant components such as methyl methacrylate or vinyl ester resin should be selected.
Confirm Product Description: When purchasing, be sure to confirm the product description’s “weldability” or specific high-temperature resistance specifications.
Special Substrates (e.g., hollow bricks, asphalt layers)
Risks: When used on loose substrates such as hollow bricks and red bricks, the anchoring force of chemical anchors will be significantly reduced, making them unsuitable for load-bearing structures. When penetrating asphalt layers, asphalt dust will hinder resin curing.
Assess Suitability: First, assess the suitability of chemical anchors for these substrates and consider alternatives.
Deepen Drilling and Thoroughly Clean the Hole: When penetrating asphalt layers, the drilling depth must be increased to the solid concrete, and all asphalt dust must be carefully removed.
Source chemical anchor factory, technology-backed
Post time: Nov-03-2025