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RESIN
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RESIN CARTRIDGE
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RESIN COMPARTMENT( 90% BY VOLUME )
• UNSATURATED POLYESTER RESINPolyester Backbone
PromotersInhibitors
• COURSE FILLER
• FINE FILLER
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CATALYST COMPARTMENT ( 10% BY VOLUME )
• BENZOYL PEROXIDE
• CARRIERThickened Water
Oil
• FILLER
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30-35 Revolutions
Mix Both Components
RESIN MIXING TIME
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RESIN SYSTEMS
TYPE OF RESIN
MIX TIME orSPIN TIME
HOLD TIME
WHAT IS GEL TIME ?WHAT IS CURE TIME ?
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WHAT GEL TIME ?
• GEL TIME IS THE TIME IT TAKES RESIN TO REACH A PASTE, OR SEMISOLID STATE.
• ( THIS USUALLY TAKES APPROXIMATELY 5 - 30 SECONDS )
• GEL TIME = SPIN TIME + HOLD TIME
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WHAT CURE TIME ?• CURE TIME IS THE TIME IT
TAKES RESIN TO REACH ABOUT 90 - 95 % OF ITS FINAL STRENGTH ( THIS USUALLY TAKES APPROXIMATELY 10 MINUTES )
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• GEL TIME
• AS A
• FUNCTION
• OF
• TEMPERATURE
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TYPICAL SYSTEMS• 1” (#5 REBAR)
• 5/8” DIA REBAR 0.9” DIA CARTRIDGE
• 1” DIA BORE 3/16” ANNULUS……
• 1” (#6 REBAR)
• 3/4” DIA REBAR 0.9” DIA CARTRIDGE
• 1” DIA BORE 1/8” ANNULUS………
• 1- 3/8” (#7 REBAR)
• 7/8” DIA REBAR 1-1/4” DIA CARTRIDGE
• 1-3/8” DIA BORE 1/4” ANNULUS………
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WHAT IS ANCHORAGE ?
ANCHORAGE MEANS HOW WELL A BOLT IS ANCHORED IN THE ROOF. WE WANT THE ANCHORAGE ZONE
OF THE BOLT TO BE GREATER THAN THE ULTIMATE STRENGTH OF THE BOLT. ( DURING A PULL TEST,
WE WANT TO BREAK THE BOLT INSTEAD OF PULLING IT OUT OF
THE MINE ROOF )
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RESIN ANCHORAGE RELATED TO COMPRESSIVE STRENGTH OF ROCK
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WHAT IS RESIN SHOW ?( ON FULLY GROUTED RESIN BOLTS)
• RESIN SHOW IS WHEN A SMALL AMOUNT OF EXCESS RESIN APPEARS BETWEEN THE BOLT HEAD AND PLATE.
• RESIN SHOW IS CAUSED, BECAUSE THERE IS APPROXIMATELY 6% MORE RESIN BY VOLUME THAN THE VOLUME OF THE ANNULUS AROUND THE BOLT.
• A LACK OF RESIN SHOW CAN MEAN A BAD INSTALLATION
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COMMON MISTAKES WHEN INSTALLING RESIN BOLTS• DRILL HOLE TOO DEEP
• DRILL HOLE TOO LARGE IN DIA.
• SPINNING BOLT TOO LONG.
• RESPINNING BOLT AFTER HOLD TIME.
• BOLT SPACING NOT ACCORDING TO ROOF CONTROL PLAN.
• OVER TORQUING BOLT DURING INSTALLATION.
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STORAGE OF RESIN
• KEEP IN A COOL, DRY PLACE.
• AVOID DOUBLE STACKING.
• AFFECTED BY HIGH STORAGE TEMPERATURE.
• UNAFFECTED BY FREEZING.
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SHELF LIFE
• QC PRODUCTS 6 MONTHS
• ALL OTHERS 1 YEAR
• SHELF LIFE CAN BE EXTENDED UP TO TWO MONTHS, BUT ONLY BY THE RESIN MANUFACTOR AFTER TESTS HAVE BEEN PREFORMED.
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SHELF LIFE
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THE END