TYPES OF GROUT

 
 👉GROUTS SPECIFIED ARE OF THREE TYPES:

➤TYPE G1: 

A PROPRIETARY NON-SHRINK CEMENTITIOUS, NON-METALLIC, NON CORROSIVE GROUT WITH MINIMUM CUBE CRUSHING STRENGTH OF 40 N/mm2 AT 28 DAYS, WHICH SHALL BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S WRITTEN INSTRUCTIONS.

THIS TYPE OF GROUT SHALL BE USED FOR MAJOR STEEL STRUCTURES AND  STATIONARY EQUIPMENT.

➤TYPE G2:

A PROPRIETARY EPOXY GROUT WHICH SHALL BE MIXED AND INSTALLED IN ACCORDANCE WITH THE MANUFACTURER'S WRITTEN INSTRUCTIONS. 

THIS TYPE OF GROUT SHALL BE USED FOR ALL MACHINERY,PUMPS AND RECIPROCATING MACHINES. 

IT SHOULD HAVE MINIMUM COMPRESSIVE STRENGTH OF 85N/mm² AT 7 DAYS.

➤TYPE G3:

SAND-CEMENT GROUT. CEMENT SHALL BE ORDINARY PORTLAND CEMENT IN ACCORDANCE WITH IS 8112 / IS 12269 AS APPLICABLE.

SAND SHALL MEET THE REQUIREMENTS FOR FINE AGGREGATE AS SPECIFIED IN IS 383.

 THE SAND-CEMENT MIX SHALL BE SUCH THAT THE COMPRESSIVE STRENGTH OF THE GROUT SHALL NOT BE LESS THAN 14N/mm² AND 22N/mm² AT 7 DAYS AND 28 DAYS RESPECTIVELY.



GENERAL NOTES-

* NOMINAL THICKNESS OF GROUTING BETWEEN THE TOP OF CONCRETE FOUNDATION LEVELS AND THE UNDERSIDE OF BASE PLATES SHALL BE 30mm, FOR UP TO A PLATE DIMENSION OF 500mm AND 50mm FOR PLATE SIZES IN EXCESS OF 500mm. 

*GROUT EDGES & SIDES SHALL BE SPLAYED AT 45°.

*THE THICKNESS OF GROUT SHALL NOT BE LESS THAN 30mm AND SHALL NOT BE MORE THAN 60mm.

*FOR ALL GROUTING WORK BELOW EQUIPMENT BASES AND FOR ANCHOR BOLT POCKETS FOR EQUIPMENT FOUNDATIONS GROUT SHALL BE FREE FLOW GROUT AS PER MANUFACTURE SPECIFICATIONS.

*NEAT CEMENT SHALL NOT BE USED FOR GROUTING UNDER ANY CONDITION.

*ORDINARY CEMENT SAND (1:2) GROUT SHOULD ONLY BE USED UNDER THE BASE PLATES OF CROSS-OVERS,SHORT PIPE SUPPORTS (NOT EXCEEDING 1.5 M HEIGHT) & SMALL OPERATING PLATFORMS (NOT EXCEEDING 2.0 M HEIGHT) NOT SUPPORTING ANY EQUIPMENT.

*FOR ROTATING EQUIPMENT BASES (ABOVE 300 kw RATING) GROUT SHALL BE AS PER REQUIREMENTS OF EQUIPMENT VENDOR OR IN ABSENCE OF ANY STATED REQUIREMENTS, GROUT TYPE SHALL BE NON-SHRINK EPOXY GROUT. FOR ALL OTHER ROTATING EQUIPMENT, NON-SHRINK CEMENTITIOUS GROUT TYPE SHALL BE USED, UNLESS SPECIFIED OTHERWISE BY EQUIPMENT VENDOR.

*IF THE THERMAL EXPANSION OF THE GROUT MATERIAL IS DIFFERENT FROM THAT OF CONCRETE, EXPANSION JOINTS SHALL BE PROVIDED IN THE GROUT AS PER GROUT MANUFACTURERS SPECIFICATION.

*SURFACE TO RECEIVE GROUT SHALL BE ROUGH, CLEAN AND LEVEL.

*IN SPECIFIC INSTANCES WHERE GROUT THICKNESS IN EXCESS OF 60mm ARE UNAVOIDABLE, GROUT SHALL BE PROVIDED WITH SUITABLE MESH REINFORCEMENT.

*AT LEAST 5-10mm OF RCC MEMBER SHALL BE CHIPPED OFF FOR GROUTING.

 

Blog By- Er. Navneet kumar






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