Polyester Resin Anchoring System
The FASLOC® resin in the cartridge is used to anchor bolts to the surrounding strata. This unification of the resin, bolt and strata layers provides the necessary strength and rigidity to prevent sag by acting as a reinforcement which anchors the individual stratified layers of rock into a single high strength beam.
The two-compartment cartridge shown in illustration A above consists of a heat-sealed tube of polyester film clipped at both ends. One compartment contains a dark gray resin; the other, a light gray catalyst. A cross section of the cartridge is shown in illustration B.
A film barrier of heat sealed polyester film prevents migration between the resin and the catalyst to provide optimum shelf life. The excellent chemical resistance of the film minimizes migration from the inside and the absorption of contaminants from the outside.
The light-weight, dimensionally stable casing of film is strong enough to withstand rough handling, but shreds quickly and thoroughly during the installation procedure.
FASLOC® is thixotropic and fast setting. This reduces viscosity during insertion of the bolt and permits relatively low installation force and torque. The results are fast installation, rapid achievement of full strength, and a minimum tendency for ungelled resin to drip from the holes during installation.
B. Cross Section
1. Figure 1 represents the range of anchorage strengths for estimating requirements.
2. Depending upon the compressive strength of the rock being considered, the diameter of the hole may affect the anchorage strength - the larger the diameter, the larger the contact area.
3. Pull test under field conditions should be used to determine actual requirements.
4. Gel times are faster when temperatures exceed 55°F and slower when temperatures are below 55°F.
5. For RPM not shown in the Mix Table, determine minimum spin time based on 30 revolutions.
6. For 1-minute and lower gel times, the spin times indicated exceed the minimum 30 revolutions necessary for mixing. The additional spin times generates heat to achieve the stated gel times.
7. Mixing the resin and catalyst components in a cartridge creates a strong three dimensional polymer matrix that is reinforced with limestone filters. Most of the anchorage strength is reached in 5 to 10 times the product gel time.
General Installation Instructions
- The installation procedures should be followed carefully to ensure successful application of FASLOC® resin grouting.
- Various factors affect installation. These instructions are general guidelines. Mine tests must be conducted with bolts to determine actual “mix” and “hold” times.
- Bolts should be installed as soon as possible in newly-exposed roof. Roof that has shifted or sagged offers least chance for successful support.
- Do not use ruptured or broken cartridges.
- Refer to M.S.D. sheets and Product Bulletin for additional technical and safety data.
Safe Handling Precautions
Caution: Do not open or puncture cartridge. Physical contact with liquid contained in cartridge may cause mild irritation. Safety glasses or eye shield should always be used when roof bolting is done. In case of eye contact, immediately flush with plenty of water for at least 15 minutes. Call a physician.
In case of skin contact, flush skin with water. Prolonged contact with skin may cause mild irritation. Irritation should subside when material is removed.
For complete safety information, refer to the Material Safety Data Sheets. Copies will be furnished upon request.
Cartridges are filled with inert fillers, water, polyester resin and activator (active ingredients include low levels of styrene and modified benzoyl peroxide). FASLOC® cartridges are for industrial use only and are intended for use in conjunction with bolts. The relationship between hole dimensions, bolt size and the size and number of cartridges is critical to good performance. Your DSI Underground representative will be glad to assist in determining the proper combinations for specific applications.
FASLOC® has been a leading supplier of polyester resin cartridges to the mining industry for over 30 years. FASLOC® resin cartridges allow for quick and reproducible anchoring of many varieties of bolts and cables. In mine roof support, FASLOC® systems reinforce strata, providing strength and rigidity in untensioned systems, and ensure a durable anchorage for FASLOC® resin grouted tensioned bolts. The reinforcement technique bonds the individual stratified layers of rock into a single, high strength beam. FASLOC® resin cartridge can also be used in many other reinforcement, stabilization, and anchoring applications. The reliability of the anchorage system, plus ease of use and minimal resin setting times, will increase productivity and safety.
Storage life is up to 1 year when the resin cartridges are stored in a cool (less than 70°F), dry, ventilated area out of direct sunlight. Under adverse conditions the anticipated shelf-life is reduced. Note that DSI Underground strongly recommends a vigorous stock rotation program, where resin is used on a first in, first out basis.
While cold storage does not adversely affect the shelf-life of FASLOC®, it should be warmed to 50-60°F before use to bring gel times within the specified range. Use at temperatures below this range will result in slower gel times.
The time required for cases of FASLOC® to warm or cool to ambient temperature is dependent on both the initial temperature and how the cases are stacked. Where the initial temperature is anywhere
The proprietary FASLOC® package has a distinct advantage over other resin systems due to:
- High catalyst/resin ratio
- Uniform installation time
- Mixing efficiency
Nominal diameters for both imperial and metric are available. Diameters are as follows: