Mungo MIT-SP Polyester Injection Mortar for Masonry: European Technical Assessment ETA 13/0033

Key things to remember

The essentials from this document in plain words. Check the full document before you rely on a figure.

• ✓Assessed to ETAG 029 as an injection anchor for masonry: a cartridge of mortar with a commercial M8, M10, M12 or M16 threaded rod, nut and washer, with or without a plastic sleeve. For static and quasi-static loads, on an assumed working life of 50 years.
• ✓Base materials: autoclaved aerated concrete, solid brick and hollow brick masonry, with masonry mortar of strength class M2.5 or better. For bricks not listed, the resistance may be found by job-site tests using the ETA's β-factors.
• ✓Without a sleeve (aerated concrete and solid masonry): M8, M10, M12 and M16 rods in 10, 12, 14 and 18mm holes, 80, 90, 100 and 100mm deep, in a wall at least the embedment plus 30mm thick. Hollow masonry uses the SH plastic sleeves, 12 to 20mm diameter and 80 to 200mm embedment; only the SH16x130/330 sleeve may be cut.
• ✓Working and curing time depend on the base material temperature. MIT-SP / MIT-SPE Plus: 6 minutes working and 45 minutes curing at 20 to 29°C; 45 minutes and 3 hours at 0 to 4°C. MIT-SP Winter can be used down to -10°C: 60 minutes working and 4 hours curing at -10 to -6°C.
• ✓Installation: drill square to the surface with a hard-metal tipped bit, using the drilling method set for each brick type. Blow out twice, brush twice, blow out twice. Pump at least three full strokes (six for foil tubes) to waste until the mortar is an even grey. Do not move or load the anchor until fully cured, then tighten with a calibrated torque wrench to no more than the maximum torque for that brick.
• ✓Temperature ranges: -40 to +40°C (long term +24°C) and -40 to +80°C (long term +50°C). Zinc-coated rods are for dry internal conditions only; stainless or high corrosion resistant (HCR) steel for outdoor and permanently damp conditions; only HCR where conditions are particularly aggressive, such as seawater or indoor swimming pools. Reaction to fire class A1; resistance to fire not assessed.
• ✓Anchorages must be designed by an engineer experienced in anchorages and masonry, to ETAG 029 Annex C, design method A. The tables give characteristic resistances for engineers, not working loads. Example: M12 at 100mm effective depth, no sleeve, in AAC6 aerated concrete (compressive strength at least 6 N/mm²), installed and used dry, 40°C/24°C range: 4.5kN characteristic tension.

Who it helps: Engineers and builders who need the certified basis for resin anchors with threaded rod in brick, block and aerated concrete.